[205132] First step in refactoring IDMContext:

- Removed the type parameter from IDMContext
- Got rid of the IDMContext.getServiceFilter() method.

plugins/org.eclipse.dd.dsf.debug.ui/plugin.xml

@@ -117,7 +117,6 @@
          </action>
          <action
                class="org.eclipse.dd.dsf.debug.ui.viewmodel.update.actions.RefreshAlwaysActionDelegate"
-               definitionId="org.eclipse.debug.ui.RegisterView"
                icon="icons/refreshalways.gif"
                id="org.eclipse.dd.dsf.debug.ui.update.registers.RefreshAlways"
                label="Always"
@@ -159,7 +158,6 @@
          </action>
          <action
                class="org.eclipse.dd.dsf.debug.ui.viewmodel.update.actions.RefreshAlwaysActionDelegate"
-               definitionId="org.eclipse.debug.ui.RegisterView"
                icon="icons/refreshalways.gif"
                id="org.eclipse.dd.dsf.debug.ui.update.registers.RefreshAlways"
                label="Always"
@@ -201,7 +199,6 @@
          </action>
          <action
                class="org.eclipse.dd.dsf.debug.ui.viewmodel.update.actions.RefreshAlwaysActionDelegate"
-               definitionId="org.eclipse.debug.ui.RegisterView"
                icon="icons/refreshalways.gif"
                id="org.eclipse.dd.dsf.debug.ui.update.registers.RefreshAlways"
                label="Always"

plugins/org.eclipse.dd.dsf.debug.ui/src/org/eclipse/dd/dsf/debug/ui/actions/DsfTerminateCommand.java

@@ -52,7 +52,7 @@ public class DsfTerminateCommand implements ITerminateHandler {
         // Javac doesn't like the cast to "(AbstractDMVMLayoutNode<?>.DMVMContext)" need to use the 
         // construct below and suppress warnings.
         @SuppressWarnings("unchecked") 
-        AbstractDMVMLayoutNode<?>.DMVMContext vmc = (AbstractDMVMLayoutNode.DMVMContext)request.getElements()[0];
+        AbstractDMVMLayoutNode.DMVMContext vmc = (AbstractDMVMLayoutNode.DMVMContext)request.getElements()[0];
         final IExecutionDMContext dmc = DMContexts.getAncestorOfType(vmc.getDMC(), IExecutionDMContext.class);
         if (dmc == null) {
             request.setEnabled(false);

plugins/org.eclipse.dd.dsf.debug.ui/src/org/eclipse/dd/dsf/debug/ui/sourcelookup/MISourceDisplayAdapter.java

@@ -89,13 +89,13 @@ public class MISourceDisplayAdapter implements ISourceDisplay
 	 */
 	class LookupJob extends Job {
 		
-		private IDMContext<?> fDmc;
+		private IDMContext fDmc;
 		private IWorkbenchPage fPage;
 
 		/**
 		 * Constructs a new source lookup job.
 		 */
-		public LookupJob(IDMContext<?> dmc, IWorkbenchPage page) {
+		public LookupJob(IDMContext dmc, IWorkbenchPage page) {
 			super("DSF Source Lookup");  //$NON-NLS-1$
 			setPriority(Job.INTERACTIVE);
 			setSystem(true);
@@ -103,7 +103,7 @@ public class MISourceDisplayAdapter implements ISourceDisplay
 			fPage = page;
 		}
 
-        IDMContext<?> getDmc() { return fDmc; }
+        IDMContext getDmc() { return fDmc; }
         
 		/* (non-Javadoc)
 		 * @see org.eclipse.core.runtime.jobs.Job#run(org.eclipse.core.runtime.IProgressMonitor)
@@ -164,7 +164,7 @@ public class MISourceDisplayAdapter implements ISourceDisplay
 		private SourceLookupResult fResult;
 		private IWorkbenchPage fPage;
         
-        IDMContext<?> getDmc() { return fResult.getDmc(); }
+        IDMContext getDmc() { return fResult.getDmc(); }
         
 		/**
 		 * Constructs a new source display job
@@ -257,7 +257,7 @@ public class MISourceDisplayAdapter implements ISourceDisplay
         /**
          * Positions the text editor for the given stack frame
          */
-        private void positionEditor(ITextEditor editor, final IDMContext<?> dmc) {
+        private void positionEditor(ITextEditor editor, final IDMContext dmc) {
             if (!(dmc instanceof IFrameDMContext)) return;
             final IFrameDMContext frameDmc = (IFrameDMContext)dmc;
             
@@ -387,7 +387,7 @@ public class MISourceDisplayAdapter implements ISourceDisplay
     private DsfSession fSession;
     private DsfExecutor fExecutor;
     private DsfServicesTracker fServicesTracker;
-    private IDMContext<?> fPrevModelContext;
+    private IDMContext fPrevModelContext;
     private SourceLookupResult fPrevResult;
     private ISourceLookupDirector fSourceLookup;
     private DsfMISourceLookupParticipant fSourceLookupParticipant;
@@ -430,7 +430,7 @@ public class MISourceDisplayAdapter implements ISourceDisplay
         if (!(context instanceof DMVMContext)) return;
         // Correct cast: (AbstractDMVMLayoutNode<?>.DMVMContext) breaks the javac compiler
         @SuppressWarnings("unchecked")
-        final IDMContext<?> dmc = ((DMVMContext)context).getDMC();
+        final IDMContext dmc = ((DMVMContext)context).getDMC();
 
         // Quick test.  DMC is checked again in source lookup participant, but 
         // it's much quicker to test here. 
@@ -455,7 +455,7 @@ public class MISourceDisplayAdapter implements ISourceDisplay
         }
     }
     
-    private void startLookupJob(final IDMContext<?> dmc, final IWorkbenchPage page) {
+    private void startLookupJob(final IDMContext dmc, final IWorkbenchPage page) {
         // If there is a previous lookup job running, cancel it.
         if (fRunningLookupJob != null) {
             fRunningLookupJob.cancel();

plugins/org.eclipse.dd.dsf.debug.ui/src/org/eclipse/dd/dsf/debug/ui/sourcelookup/SourceLookupResult.java

@@ -24,7 +24,7 @@ class SourceLookupResult  {
     /** 
      * Element that source was resolved for.
      */
-    private IDMContext<?> fDmc;
+    private IDMContext fDmc;
     /**
      * Corresponding source element, or <code>null</code>
      * if unknown.
@@ -45,7 +45,7 @@ class SourceLookupResult  {
      * Creates a source lookup result on the given artifact, source element, 
      * editor id, and editor input.
      */
-    public SourceLookupResult(IDMContext<?> dmc, Object sourceElement, String editorId, IEditorInput editorInput) {
+    public SourceLookupResult(IDMContext dmc, Object sourceElement, String editorId, IEditorInput editorInput) {
         fDmc = dmc;
         setSourceElement(sourceElement);
         setEditorId(editorId);
@@ -55,7 +55,7 @@ class SourceLookupResult  {
     /* (non-Javadoc)
      * @see org.eclipse.debug.ui.sourcelookup.ISourceLookupResult#getArtifact()
      */
-    public IDMContext<?> getDmc() {
+    public IDMContext getDmc() {
         return fDmc;
     }
     
@@ -121,7 +121,7 @@ class SourceLookupResult  {
 	 * 
 	 * @param artifact new artifact state
 	 */
-	public void updateArtifact(IDMContext<?> dmc) {
+	public void updateArtifact(IDMContext dmc) {
 		if (fDmc.equals(dmc)) {
 			fDmc = dmc;
 		}

plugins/org.eclipse.dd.dsf.debug.ui/src/org/eclipse/dd/dsf/debug/ui/viewmodel/detailpanesupport/DetailPane.java

@@ -321,7 +321,7 @@ public class DetailPane implements IDetailPane, IAdaptable, IPropertyChangeListe
                  */
                 if ( element instanceof DMVMContext) {
                     IFormattedValues service = null;
-                    IFormattedDataDMContext<?> dmc = null ;
+                    IFormattedDataDMContext dmc = null ;
                     
                     /*
                      *  We are specifically looking to support the following Data Model Contexts
@@ -384,7 +384,7 @@ public class DetailPane implements IDetailPane, IAdaptable, IPropertyChangeListe
                      *  typically be a burden. We should probably consider perhaps doing a
                      *  preference where they can select what formats they want to show.
                      */
-                    final IFormattedDataDMContext<?> finalDmc = dmc;
+                    final IFormattedDataDMContext finalDmc = dmc;
                     final IFormattedValues finalService = service;
 
                     final DataRequestMonitor<String[]> getAvailableFormatsDone = 

plugins/org.eclipse.dd.dsf.debug.ui/src/org/eclipse/dd/dsf/debug/ui/viewmodel/expression/AbstractExpressionLayoutNode.java

@@ -21,7 +21,6 @@ import org.eclipse.dd.dsf.concurrent.DataRequestMonitor;
 import org.eclipse.dd.dsf.concurrent.MultiRequestMonitor;
 import org.eclipse.dd.dsf.concurrent.RequestMonitor;
 import org.eclipse.dd.dsf.datamodel.IDMContext;
-import org.eclipse.dd.dsf.datamodel.IDMData;
 import org.eclipse.dd.dsf.debug.ui.DsfDebugUIPlugin;
 import org.eclipse.dd.dsf.service.DsfSession;
 import org.eclipse.dd.dsf.service.IDsfService;
@@ -39,11 +38,11 @@ import org.eclipse.jface.viewers.TreePath;
  * 
  */
 @SuppressWarnings("restriction")
-public abstract class AbstractExpressionLayoutNode<V extends IDMData> extends AbstractDMVMLayoutNode<V> 
+public abstract class AbstractExpressionLayoutNode extends AbstractDMVMLayoutNode 
     implements IExpressionLayoutNode
 {
     
-    public AbstractExpressionLayoutNode(AbstractVMProvider provider, DsfSession session, Class<? extends IDMContext<V>> dmcClassType) {
+    public AbstractExpressionLayoutNode(AbstractVMProvider provider, DsfSession session, Class<? extends IDMContext> dmcClassType) {
         super(provider, session, dmcClassType);
     }
 

plugins/org.eclipse.dd.dsf.debug.ui/src/org/eclipse/dd/dsf/debug/ui/viewmodel/expression/ExpressionVMProvider.java

@@ -60,8 +60,8 @@ public class ExpressionVMProvider extends AbstractDebugDMVMProviderWithCache imp
         /*
          *  Allocate the synchronous data providers.
          */
-        SyncRegisterDataAccess syncRegDataAccess = new SyncRegisterDataAccess();
+        SyncRegisterDataAccess syncRegDataAccess = new SyncRegisterDataAccess(getSession());
-        SyncVariableDataAccess syncvarDataAccess = new SyncVariableDataAccess() ;
+        SyncVariableDataAccess syncvarDataAccess = new SyncVariableDataAccess(getSession()) ;
         
         /*
          *  Create the top level node which provides the anchor starting point.

plugins/org.eclipse.dd.dsf.debug.ui/src/org/eclipse/dd/dsf/debug/ui/viewmodel/launch/StackFramesLayoutNode.java

@@ -15,7 +15,6 @@ import java.util.List;
 import org.eclipse.dd.dsf.concurrent.DataRequestMonitor;
 import org.eclipse.dd.dsf.concurrent.RequestMonitor;
 import org.eclipse.dd.dsf.datamodel.DMContexts;
-import org.eclipse.dd.dsf.datamodel.IDMContext;
 import org.eclipse.dd.dsf.datamodel.IDMEvent;
 import org.eclipse.dd.dsf.debug.service.IRunControl;
 import org.eclipse.dd.dsf.debug.service.IStack;
@@ -28,10 +27,12 @@ import org.eclipse.dd.dsf.debug.service.IRunControl.StateChangeReason;
 import org.eclipse.dd.dsf.debug.service.IStack.IFrameDMContext;
 import org.eclipse.dd.dsf.debug.service.IStack.IFrameDMData;
 import org.eclipse.dd.dsf.service.DsfSession;
+import org.eclipse.dd.dsf.service.IDsfService;
 import org.eclipse.dd.dsf.ui.viewmodel.AbstractVMProvider;
 import org.eclipse.dd.dsf.ui.viewmodel.IVMContext;
 import org.eclipse.dd.dsf.ui.viewmodel.VMDelta;
 import org.eclipse.dd.dsf.ui.viewmodel.dm.AbstractDMVMLayoutNode;
+import org.eclipse.dd.dsf.ui.viewmodel.update.VMCacheManager;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenUpdate;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IHasChildrenUpdate;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.ILabelUpdate;
@@ -41,7 +42,7 @@ import org.eclipse.debug.ui.DebugUITools;
 import org.eclipse.debug.ui.IDebugUIConstants;
 
 @SuppressWarnings("restriction")
-public class StackFramesLayoutNode extends AbstractDMVMLayoutNode<IStack.IFrameDMData> {
+public class StackFramesLayoutNode extends AbstractDMVMLayoutNode {
     
     public IVMContext[] fCachedOldFrameVMCs;
     
@@ -143,8 +144,49 @@ public class StackFramesLayoutNode extends AbstractDMVMLayoutNode<IStack.IFrameD
     }
     
     @Override
-    protected void fillColumnLabel(IDMContext<IFrameDMData> dmContext, IFrameDMData dmData, String columnId, int idx,
+    protected void updateLabelInSessionThread(ILabelUpdate[] updates) {
-                                   ILabelUpdate update) 
+        for (final ILabelUpdate update : updates) {
+            final IFrameDMContext dmc = findDmcInPath(update.getElementPath(), IFrameDMContext.class);
+            if (!checkDmc(dmc, update) || !checkService(IStack.class, null, update)) continue;
+            
+            VMCacheManager.getVMCacheManager().getCache(update.getPresentationContext())
+                .getModelData(getServicesTracker().getService(IStack.class, null),
+                dmc, 
+                new DataRequestMonitor<IFrameDMData>(getSession().getExecutor(), null) { 
+                    @Override
+                    protected void handleCompleted() {
+                        /*
+                         * Check that the request was evaluated and data is still
+                         * valid.  The request could fail if the state of the 
+                         * service changed during the request, but the view model
+                         * has not been updated yet.
+                         */ 
+                        if (!getStatus().isOK()) {
+                            assert getStatus().isOK() || 
+                                   getStatus().getCode() != IDsfService.INTERNAL_ERROR || 
+                                   getStatus().getCode() != IDsfService.NOT_SUPPORTED;
+                            handleFailedUpdate(update);
+                            return;
+                        }
+                        
+                        /*
+                         * If columns are configured, call the protected methods to 
+                         * fill in column values.  
+                         */
+                        String[] localColumns = update.getPresentationContext().getColumns();
+                        if (localColumns == null) localColumns = new String[] { null };
+                        
+                        for (int i = 0; i < localColumns.length; i++) {
+                            fillColumnLabel(dmc, getData(), localColumns[i], i, update);
+                        }
+                        update.done();
+                    }
+                },
+                getExecutor());
+        }
+    }
+
+    protected void fillColumnLabel(IFrameDMContext dmContext, IFrameDMData dmData, String columnId, int idx, ILabelUpdate update) 
     {
         if (idx != 0) return;
         

plugins/org.eclipse.dd.dsf.debug.ui/src/org/eclipse/dd/dsf/debug/ui/viewmodel/register/RegisterBitFieldLayoutCellModifier.java

@@ -41,7 +41,7 @@ public class RegisterBitFieldLayoutCellModifier extends WatchExpressionCellModif
      */
     private IBitFieldDMContext getBitFieldDMC(Object element) {
         if (element instanceof AbstractDMVMLayoutNode.DMVMContext) {
-            IDMContext<?> dmc = ((AbstractDMVMLayoutNode.DMVMContext)element).getDMC();
+            IDMContext dmc = ((AbstractDMVMLayoutNode.DMVMContext)element).getDMC();
             return DMContexts.getAncestorOfType(dmc, IBitFieldDMContext.class);
         }
         return null;

plugins/org.eclipse.dd.dsf.debug.ui/src/org/eclipse/dd/dsf/debug/ui/viewmodel/register/RegisterBitFieldLayoutNode.java

@@ -18,7 +18,6 @@ import org.eclipse.dd.dsf.concurrent.RequestMonitor;
 import org.eclipse.dd.dsf.datamodel.DMContexts;
 import org.eclipse.dd.dsf.datamodel.IDMContext;
 import org.eclipse.dd.dsf.datamodel.IDMEvent;
-import org.eclipse.dd.dsf.datamodel.IDMService;
 import org.eclipse.dd.dsf.debug.service.IFormattedValues;
 import org.eclipse.dd.dsf.debug.service.IRegisters;
 import org.eclipse.dd.dsf.debug.service.IRunControl;
@@ -64,13 +63,13 @@ import org.eclipse.jface.viewers.TreePath;
 import org.eclipse.swt.widgets.Composite;
 
 @SuppressWarnings("restriction")
-public class RegisterBitFieldLayoutNode extends AbstractExpressionLayoutNode<IBitFieldDMData> implements IElementEditor {
+public class RegisterBitFieldLayoutNode extends AbstractExpressionLayoutNode implements IElementEditor {
 
     protected class BitFieldVMC extends DMVMContext
         implements IVariable, IFormattedValueVMContext
     {
         private IExpression fExpression;
-        public BitFieldVMC(IDMContext<?> dmc) {
+        public BitFieldVMC(IDMContext dmc) {
             super(dmc);
         }
         
@@ -285,7 +284,7 @@ public class RegisterBitFieldLayoutNode extends AbstractExpressionLayoutNode<IBi
             final IBitFieldDMContext dmc = findDmcInPath(update.getElementPath(), IRegisters.IBitFieldDMContext.class);
             
             VMCacheManager.getVMCacheManager().getCache(update.getPresentationContext())
-				.getModelData((IDMService)getServicesTracker().getService(null, dmc.getServiceFilter()),
+				.getModelData(getServicesTracker().getService(IRegisters.class),
                 dmc, 
                 new DataRequestMonitor<IBitFieldDMData>(getSession().getExecutor(), null) { 
                     @Override
@@ -296,7 +295,7 @@ public class RegisterBitFieldLayoutNode extends AbstractExpressionLayoutNode<IBi
                          * service changed during the request, but the view model
                          * has not been updated yet.
                          */ 
-                        if (!getStatus().isOK() || !getData().isValid()) {
+                        if (!getStatus().isOK()) {
                             assert getStatus().isOK() || 
                                    getStatus().getCode() != IDsfService.INTERNAL_ERROR || 
                                    getStatus().getCode() != IDsfService.NOT_SUPPORTED;
@@ -392,7 +391,7 @@ public class RegisterBitFieldLayoutNode extends AbstractExpressionLayoutNode<IBi
     }
     
     @Override
-    protected IVMContext createVMContext(IDMContext<IBitFieldDMData> dmc) {
+    protected IVMContext createVMContext(IDMContext dmc) {
         return new BitFieldVMC(dmc);
     }
     

plugins/org.eclipse.dd.dsf.debug.ui/src/org/eclipse/dd/dsf/debug/ui/viewmodel/register/RegisterGroupLayoutNode.java

@@ -56,14 +56,14 @@ import org.eclipse.jface.viewers.TreePath;
 import org.eclipse.swt.widgets.Composite;
 
 @SuppressWarnings("restriction")
-public class RegisterGroupLayoutNode extends AbstractExpressionLayoutNode<IRegisterGroupDMData>
+public class RegisterGroupLayoutNode extends AbstractExpressionLayoutNode
     implements IElementEditor
 {
 
     protected class RegisterGroupVMC extends DMVMContext implements IVariable
     {
         private IExpression fExpression;
-        public RegisterGroupVMC(IDMContext<?> dmc) {
+        public RegisterGroupVMC(IDMContext dmc) {
             super(dmc);
         }
         
@@ -173,13 +173,55 @@ public class RegisterGroupLayoutNode extends AbstractExpressionLayoutNode<IRegis
     }
     
     @Override
-    protected IVMContext createVMContext(IDMContext<IRegisterGroupDMData> dmc) {
+    protected IVMContext createVMContext(IDMContext dmc) {
         return new RegisterGroupVMC(dmc);
     }
 
     
     @Override
-    protected void fillColumnLabel(IDMContext<IRegisterGroupDMData> dmContext, IRegisterGroupDMData dmData,
+    protected void updateLabelInSessionThread(ILabelUpdate[] updates) {
+        for (final ILabelUpdate update : updates) {
+            final IRegisterGroupDMContext dmc = findDmcInPath(update.getElementPath(), IRegisterGroupDMContext.class);
+            if (!checkDmc(dmc, update) || !checkService(IRegisters.class, null, update)) continue;
+            
+            VMCacheManager.getVMCacheManager().getCache(update.getPresentationContext())
+                .getModelData(getServicesTracker().getService(IRegisters.class, null),
+                dmc, 
+                new DataRequestMonitor<IRegisterGroupDMData>(getSession().getExecutor(), null) { 
+                    @Override
+                    protected void handleCompleted() {
+                        /*
+                         * Check that the request was evaluated and data is still
+                         * valid.  The request could fail if the state of the 
+                         * service changed during the request, but the view model
+                         * has not been updated yet.
+                         */ 
+                        if (!getStatus().isOK()) {
+                            assert getStatus().isOK() || 
+                                   getStatus().getCode() != IDsfService.INTERNAL_ERROR || 
+                                   getStatus().getCode() != IDsfService.NOT_SUPPORTED;
+                            handleFailedUpdate(update);
+                            return;
+                        }
+                        
+                        /*
+                         * If columns are configured, call the protected methods to 
+                         * fill in column values.  
+                         */
+                        String[] localColumns = update.getPresentationContext().getColumns();
+                        if (localColumns == null) localColumns = new String[] { null };
+                        
+                        for (int i = 0; i < localColumns.length; i++) {
+                            fillColumnLabel(dmc, getData(), localColumns[i], i, update);
+                        }
+                        update.done();
+                    }
+                },
+                getExecutor());
+        }
+    }
+
+    protected void fillColumnLabel(IRegisterGroupDMContext dmContext, IRegisterGroupDMData dmData,
                                    String columnId, int idx, ILabelUpdate update) 
     {
         if (IDebugVMConstants.COLUMN_ID__NAME.equals(columnId)) {

plugins/org.eclipse.dd.dsf.debug.ui/src/org/eclipse/dd/dsf/debug/ui/viewmodel/register/RegisterLayoutNode.java

@@ -18,7 +18,6 @@ import org.eclipse.dd.dsf.concurrent.RequestMonitor;
 import org.eclipse.dd.dsf.datamodel.DMContexts;
 import org.eclipse.dd.dsf.datamodel.IDMContext;
 import org.eclipse.dd.dsf.datamodel.IDMEvent;
-import org.eclipse.dd.dsf.datamodel.IDMService;
 import org.eclipse.dd.dsf.debug.service.IFormattedValues;
 import org.eclipse.dd.dsf.debug.service.IRegisters;
 import org.eclipse.dd.dsf.debug.service.IRunControl;
@@ -63,14 +62,14 @@ import org.eclipse.jface.viewers.TreePath;
 import org.eclipse.swt.widgets.Composite;
 
 @SuppressWarnings("restriction")
-public class RegisterLayoutNode extends AbstractExpressionLayoutNode<IRegisterDMData> 
+public class RegisterLayoutNode extends AbstractExpressionLayoutNode 
                                 implements IElementEditor
 {
     protected class RegisterVMC extends DMVMContext
     implements IVariable, IFormattedValueVMContext
     {
         private IExpression fExpression;
-        public RegisterVMC(IDMContext<?> dmc) {
+        public RegisterVMC(IDMContext dmc) {
             super(dmc);
         }
 
@@ -282,10 +281,10 @@ public class RegisterLayoutNode extends AbstractExpressionLayoutNode<IRegisterDM
     protected void updateLabelInSessionThread(ILabelUpdate[] updates) {
         for (final ILabelUpdate update : updates) {
             final IRegisterDMContext dmc = findDmcInPath(update.getElementPath(), IRegisters.IRegisterDMContext.class);
-            if (!checkDmc(dmc, update) || !checkService(null, dmc.getServiceFilter(), update)) continue;
+            if (!checkDmc(dmc, update) || !checkService(IRegisters.class, null, update)) continue;
             
             VMCacheManager.getVMCacheManager().getCache(update.getPresentationContext())
-	        		.getModelData((IDMService)getServicesTracker().getService(null, dmc.getServiceFilter()),
+	        		.getModelData(getServicesTracker().getService(IRegisters.class),
 	        		dmc,             
             		new DataRequestMonitor<IRegisterDMData>(getSession().getExecutor(), null) { 
                     @Override
@@ -296,7 +295,7 @@ public class RegisterLayoutNode extends AbstractExpressionLayoutNode<IRegisterDM
                          * service changed during the request, but the view model
                          * has not been updated yet.
                          */ 
-                        if (!getStatus().isOK() || !getData().isValid()) {
+                        if (!getStatus().isOK()) {
                             assert getStatus().isOK() || 
                                    getStatus().getCode() != IDsfService.INTERNAL_ERROR || 
                                    getStatus().getCode() != IDsfService.NOT_SUPPORTED;
@@ -394,7 +393,7 @@ public class RegisterLayoutNode extends AbstractExpressionLayoutNode<IRegisterDM
     }
     
     @Override
-    protected IVMContext createVMContext(IDMContext<IRegisterDMData> dmc) {
+    protected IVMContext createVMContext(IDMContext dmc) {
         return new RegisterVMC(dmc);
     }
     

plugins/org.eclipse.dd.dsf.debug.ui/src/org/eclipse/dd/dsf/debug/ui/viewmodel/register/RegisterLayoutValueCellModifier.java

@@ -45,7 +45,7 @@ public class RegisterLayoutValueCellModifier extends WatchExpressionCellModifier
      */
     protected IRegisterDMContext getRegisterDMC(Object element) {
         if (element instanceof AbstractDMVMLayoutNode.DMVMContext) {
-            IDMContext<?> dmc = ((AbstractDMVMLayoutNode.DMVMContext)element).getDMC();
+            IDMContext dmc = ((AbstractDMVMLayoutNode.DMVMContext)element).getDMC();
             return DMContexts.getAncestorOfType(dmc, IRegisterDMContext.class);
         }
         return null;

plugins/org.eclipse.dd.dsf.debug.ui/src/org/eclipse/dd/dsf/debug/ui/viewmodel/register/RegisterVMProvider.java

@@ -35,7 +35,7 @@ public class RegisterVMProvider extends AbstractDebugDMVMProviderWithCache
         /*
          *  Create the register data access routines.
          */
-        SyncRegisterDataAccess regAccess = new SyncRegisterDataAccess() ;
+        SyncRegisterDataAccess regAccess = new SyncRegisterDataAccess(session) ;
         
         /*
          *  Create the top level node to deal with the root selection.

plugins/org.eclipse.dd.dsf.debug.ui/src/org/eclipse/dd/dsf/debug/ui/viewmodel/register/SyncRegisterDataAccess.java

@@ -17,6 +17,7 @@ import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.dd.dsf.concurrent.DataRequestMonitor;
 import org.eclipse.dd.dsf.concurrent.Query;
+import org.eclipse.dd.dsf.concurrent.ThreadSafe;
 import org.eclipse.dd.dsf.concurrent.ThreadSafeAndProhibitedFromDsfExecutor;
 import org.eclipse.dd.dsf.datamodel.DMContexts;
 import org.eclipse.dd.dsf.datamodel.IDMContext;
@@ -38,45 +39,59 @@ import org.eclipse.dd.dsf.ui.viewmodel.dm.AbstractDMVMLayoutNode;
 import org.osgi.framework.InvalidSyntaxException;
 import org.osgi.util.tracker.ServiceTracker;
 
-@ThreadSafeAndProhibitedFromDsfExecutor("")
+@ThreadSafeAndProhibitedFromDsfExecutor("fSession#getExecutor")
 public class SyncRegisterDataAccess {
 
+    /**
+     * The session that this data access operates in.
+     */
+    private final DsfSession fSession;
+
     /**
      * Need to use the OSGi service tracker here (instead of DsfServiceTracker),
      * because we're accessing it in non-dispatch thread. DsfServiceTracker is
      * not thread-safe.
      */
+    @ThreadSafe
     private ServiceTracker fServiceTracker;
 
-    private synchronized IRegisters getService(String filter) {
+    public SyncRegisterDataAccess(DsfSession session) {
+        fSession = session;
+    }
+    
+    @ThreadSafe
+    private synchronized IRegisters getService() {
 
         if (fServiceTracker == null) {
             try {
-                fServiceTracker = new ServiceTracker(DsfDebugUIPlugin
+                fServiceTracker = new ServiceTracker(
-                        .getBundleContext(), DsfDebugUIPlugin.getBundleContext()
+                    DsfDebugUIPlugin.getBundleContext(), 
-                        .createFilter(filter), null);
+                    DsfDebugUIPlugin.getBundleContext().createFilter(getServiceFilter()), null);
                 fServiceTracker.open();
             } catch (InvalidSyntaxException e) {
-                assert false : "Invalid filter in DMC: " + filter; //$NON-NLS-1$
                 return null;
             }
-        } else {
-            /*
-             * All of the DMCs that this cell modifier is invoked for should
-             * originate from the same service. This assertion checks this
-             * assumption by comparing the service reference in the tracker to
-             * the filter string in the DMC.
-             */
-            try {
-                assert DsfDebugUIPlugin.getBundleContext().createFilter(filter)
-                        .match(fServiceTracker.getServiceReference());
-            } catch (InvalidSyntaxException e) {
-            }
         }
         return (IRegisters) fServiceTracker.getService();
     }
     
-    public void dispose() {
+    private String getServiceFilter() {
+        StringBuffer filter = new StringBuffer();
+        filter.append("(&"); //$NON-NLS-1$
+        filter.append("(OBJECTCLASS="); //$NON-NLS-1$
+        filter.append(IRegisters.class.getName());
+        filter.append(')');
+        filter.append('(');
+        filter.append(IDsfService.PROP_SESSION_ID);
+        filter.append('=');
+        filter.append(fSession.getId());
+        filter.append(')');
+        filter.append(')');
+        return filter.toString();
+    }
+    
+    @ThreadSafe
+    public synchronized void dispose() {
         if ( fServiceTracker != null ) {
             fServiceTracker.close();
         }
@@ -105,7 +120,7 @@ public class SyncRegisterDataAccess {
                 return;
             }
 
-            IRegisters service = getService(fDmc.getServiceFilter());
+            IRegisters service = getService();
             if (service == null) {
                 rm.setStatus(new Status(IStatus.ERROR, DsfDebugUIPlugin.PLUGIN_ID, IDsfService.INVALID_STATE, "Service not available", null)); //$NON-NLS-1$
                 rm.done();
@@ -140,7 +155,7 @@ public class SyncRegisterDataAccess {
 
     public IBitFieldDMContext getBitFieldDMC(Object element) {
         if (element instanceof AbstractDMVMLayoutNode.DMVMContext) {
-            IDMContext<?> dmc = ((AbstractDMVMLayoutNode.DMVMContext)element).getDMC();
+            IDMContext dmc = ((AbstractDMVMLayoutNode.DMVMContext)element).getDMC();
             return DMContexts.getAncestorOfType(dmc, IBitFieldDMContext.class);
         }
         return null;
@@ -207,7 +222,7 @@ public class SyncRegisterDataAccess {
             /*
              * Guard against a disposed service
              */
-            IRegisters service = getService(fDmc.getServiceFilter());
+            IRegisters service = getService();
             if (service == null) {
                 rm.setStatus(new Status(IStatus.ERROR, DsfDebugUIPlugin.PLUGIN_ID, IDsfService.INVALID_STATE, "Service unavailable", null)); //$NON-NLS-1$
                 rm.done();
@@ -315,7 +330,7 @@ public class SyncRegisterDataAccess {
             /*
              * Guard against a disposed service
              */
-            IRegisters service = getService(fDmc.getServiceFilter());
+            IRegisters service = getService();
             if (service == null) {
                 rm.setStatus(new Status(IStatus.ERROR, DsfDebugUIPlugin.PLUGIN_ID, IDsfService.INVALID_STATE, "Service unavailable", null)); //$NON-NLS-1$
                 rm.done();
@@ -396,7 +411,7 @@ public class SyncRegisterDataAccess {
 
     public IRegisterGroupDMContext getRegisterGroupDMC(Object element) {
         if (element instanceof AbstractDMVMLayoutNode.DMVMContext) {
-            IDMContext<?> dmc = ((AbstractDMVMLayoutNode.DMVMContext)element).getDMC();
+            IDMContext dmc = ((AbstractDMVMLayoutNode.DMVMContext)element).getDMC();
             return DMContexts.getAncestorOfType(dmc, IRegisterGroupDMContext.class);
         }
         return null;
@@ -404,15 +419,15 @@ public class SyncRegisterDataAccess {
 
     public IRegisterDMContext getRegisterDMC(Object element) {
         if (element instanceof AbstractDMVMLayoutNode.DMVMContext) {
-            IDMContext<?> dmc = ((AbstractDMVMLayoutNode.DMVMContext)element).getDMC();
+            IDMContext dmc = ((AbstractDMVMLayoutNode.DMVMContext)element).getDMC();
             return DMContexts.getAncestorOfType(dmc, IRegisterDMContext.class);
         }
         return null;
     }
 
-    public IFormattedDataDMContext<?> getFormattedDMC(Object element) {
+    public IFormattedDataDMContext getFormattedDMC(Object element) {
         if (element instanceof AbstractDMVMLayoutNode.DMVMContext) {
-            IDMContext<?> dmc = ((AbstractDMVMLayoutNode.DMVMContext)element).getDMC();
+            IDMContext dmc = ((AbstractDMVMLayoutNode.DMVMContext)element).getDMC();
             IRegisterDMContext  regdmc = DMContexts.getAncestorOfType(dmc, IRegisterDMContext.class);
             return DMContexts.getAncestorOfType(regdmc, IFormattedDataDMContext.class);
         }
@@ -442,7 +457,7 @@ public class SyncRegisterDataAccess {
                 return;
             }
 
-            IRegisters service = getService(fDmc.getServiceFilter());
+            IRegisters service = getService();
             if (service == null) {
                 rm.setStatus(new Status(IStatus.ERROR, DsfDebugUIPlugin.PLUGIN_ID, IDsfService.INVALID_STATE, "Service not available", null)); //$NON-NLS-1$
                 rm.done();
@@ -531,7 +546,7 @@ public class SyncRegisterDataAccess {
                 return;
             }
 
-            IRegisters service = getService(fDmc.getServiceFilter());
+            IRegisters service = getService();
             if (service == null) {
                 rm.setStatus(new Status(IStatus.ERROR, DsfDebugUIPlugin.PLUGIN_ID, IDsfService.INVALID_STATE, "Service not available", null)); //$NON-NLS-1$
                 rm.done();
@@ -625,7 +640,7 @@ public class SyncRegisterDataAccess {
             /*
              * Guard against a disposed service
              */
-            IRegisters service = getService(fDmc.getServiceFilter());
+            IRegisters service = getService();
             if (service == null) {
                 rm.setStatus(new Status(IStatus.ERROR, DsfDebugUIPlugin.PLUGIN_ID, IDsfService.INVALID_STATE, "Service unavailable", null)); //$NON-NLS-1$
                 rm.done();
@@ -712,9 +727,9 @@ public class SyncRegisterDataAccess {
 
     public class GetSupportFormatsValueQuery extends Query<Object> {
 
-        IFormattedDataDMContext<?> fDmc;
+        IFormattedDataDMContext fDmc;
 
-        public GetSupportFormatsValueQuery(IFormattedDataDMContext<?> dmc) {
+        public GetSupportFormatsValueQuery(IFormattedDataDMContext dmc) {
             super();
             fDmc = dmc;
         }
@@ -734,7 +749,7 @@ public class SyncRegisterDataAccess {
             /*
              * Guard against a disposed service
              */
-            IRegisters service = getService(fDmc.getServiceFilter());
+            IRegisters service = getService();
             if (service == null) {
                 rm.setStatus(new Status(IStatus.ERROR, DsfDebugUIPlugin.PLUGIN_ID, IDsfService.INVALID_STATE, "Service unavailable", null)); //$NON-NLS-1$
                 rm.done();
@@ -779,9 +794,9 @@ public class SyncRegisterDataAccess {
          * Get the DMC and the session. If element is not an register DMC, or
          * session is stale, then bail out.
          */
-        IFormattedDataDMContext<?> dmc = null;
+        IFormattedDataDMContext dmc = null;
         if (element instanceof AbstractDMVMLayoutNode.DMVMContext) {
-            IDMContext<?> vmcdmc = ((AbstractDMVMLayoutNode.DMVMContext)element).getDMC();
+            IDMContext vmcdmc = ((AbstractDMVMLayoutNode.DMVMContext)element).getDMC();
             IRegisterDMContext  regdmc = DMContexts.getAncestorOfType(vmcdmc, IRegisterDMContext.class);
             dmc = DMContexts.getAncestorOfType(regdmc, IFormattedDataDMContext.class);
         }
@@ -815,10 +830,10 @@ public class SyncRegisterDataAccess {
     
     public class GetFormattedValueValueQuery extends Query<Object> {
 
-        private IFormattedDataDMContext<?> fDmc;
+        private IFormattedDataDMContext fDmc;
         private String fFormatId;
 
-        public GetFormattedValueValueQuery(IFormattedDataDMContext<?> dmc, String formatId) {
+        public GetFormattedValueValueQuery(IFormattedDataDMContext dmc, String formatId) {
             super();
             fDmc = dmc;
             fFormatId = formatId;
@@ -839,7 +854,7 @@ public class SyncRegisterDataAccess {
             /*
              * Guard against a disposed service
              */
-            IRegisters service = getService(fDmc.getServiceFilter());
+            IRegisters service = getService();
             if (service == null) {
                 rm .setStatus(new Status(IStatus.ERROR, DsfDebugUIPlugin.PLUGIN_ID, IDsfService.INVALID_STATE, "Service unavailable", null)); //$NON-NLS-1$
                 rm.done();
@@ -883,9 +898,9 @@ public class SyncRegisterDataAccess {
          * Get the DMC and the session. If element is not an register DMC, or
          * session is stale, then bail out.
          */
-        IFormattedDataDMContext<?> dmc = null;
+        IFormattedDataDMContext dmc = null;
         if (element instanceof AbstractDMVMLayoutNode.DMVMContext) {
-            IDMContext<?> vmcdmc = ((AbstractDMVMLayoutNode.DMVMContext)element).getDMC();
+            IDMContext vmcdmc = ((AbstractDMVMLayoutNode.DMVMContext)element).getDMC();
             IRegisterDMContext  regdmc = DMContexts.getAncestorOfType(vmcdmc, IRegisterDMContext.class);
             dmc = DMContexts.getAncestorOfType(regdmc, IFormattedDataDMContext.class);
         }
@@ -923,9 +938,9 @@ public class SyncRegisterDataAccess {
          * Get the DMC and the session. If element is not an register DMC, or
          * session is stale, then bail out.
          */
-        IFormattedDataDMContext<?> dmc = null;
+        IFormattedDataDMContext dmc = null;
         if (element instanceof AbstractDMVMLayoutNode.DMVMContext) {
-            IDMContext<?> vmcdmc = ((AbstractDMVMLayoutNode.DMVMContext)element).getDMC();
+            IDMContext vmcdmc = ((AbstractDMVMLayoutNode.DMVMContext)element).getDMC();
             IBitFieldDMContext  bitfielddmc = DMContexts.getAncestorOfType(vmcdmc, IBitFieldDMContext.class);
             dmc = DMContexts.getAncestorOfType(bitfielddmc, IFormattedDataDMContext.class);
         }

plugins/org.eclipse.dd.dsf.debug.ui/src/org/eclipse/dd/dsf/debug/ui/viewmodel/variable/SyncVariableDataAccess.java

@@ -13,6 +13,7 @@ import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.dd.dsf.concurrent.DataRequestMonitor;
 import org.eclipse.dd.dsf.concurrent.Query;
+import org.eclipse.dd.dsf.concurrent.ThreadSafe;
 import org.eclipse.dd.dsf.concurrent.ThreadSafeAndProhibitedFromDsfExecutor;
 import org.eclipse.dd.dsf.debug.service.IExpressions;
 import org.eclipse.dd.dsf.debug.service.IExpressions.IExpressionDMContext;
@@ -26,45 +27,60 @@ import org.eclipse.dd.dsf.service.IDsfService;
 import org.osgi.framework.InvalidSyntaxException;
 import org.osgi.util.tracker.ServiceTracker;
 
-@ThreadSafeAndProhibitedFromDsfExecutor("")
+@ThreadSafeAndProhibitedFromDsfExecutor("fSession#getExecutor")
 public class SyncVariableDataAccess {
 
+    /**
+     * The session that this data access operates in.
+     */
+    private final DsfSession fSession;
+    
     /**
      * Need to use the OSGi service tracker here (instead of DsfServiceTracker),
      * because we're accessing it in non-dispatch thread. DsfServiceTracker is
      * not thread-safe.
      */
+    @ThreadSafe
     private ServiceTracker fServiceTracker;
 
-    private synchronized IExpressions getService(String filter) {
+    
+    public SyncVariableDataAccess(DsfSession session) {
+        fSession = session;
+    }
+    
+    @ThreadSafe
+    private synchronized IExpressions getService() {
 
         if (fServiceTracker == null) {
             try {
-                fServiceTracker = new ServiceTracker(DsfDebugUIPlugin
+                fServiceTracker = new ServiceTracker(
-                        .getBundleContext(), DsfDebugUIPlugin.getBundleContext()
+                    DsfDebugUIPlugin.getBundleContext(), 
-                        .createFilter(filter), null);
+                    DsfDebugUIPlugin.getBundleContext().createFilter(getServiceFilter()), null);
                 fServiceTracker.open();
             } catch (InvalidSyntaxException e) {
-                assert false : "Invalid filter in DMC: " + filter; //$NON-NLS-1$
                 return null;
             }
-        } else {
+        } 
-            /*
-             * All of the DMCs that this cell modifier is invoked for should
-             * originate from the same service. This assertion checks this
-             * assumption by comparing the service reference in the tracker to
-             * the filter string in the DMC.
-             */
-            try {
-                assert DsfDebugUIPlugin.getBundleContext().createFilter(filter)
-                        .match(fServiceTracker.getServiceReference());
-            } catch (InvalidSyntaxException e) {
-            }
-        }
         return (IExpressions) fServiceTracker.getService();
     }
-    
+
-    public void dispose() {
+    private String getServiceFilter() {
+        StringBuffer filter = new StringBuffer();
+        filter.append("(&"); //$NON-NLS-1$
+        filter.append("(OBJECTCLASS="); //$NON-NLS-1$
+        filter.append(IExpressions.class.getName());
+        filter.append(')');
+        filter.append('(');
+        filter.append(IDsfService.PROP_SESSION_ID);
+        filter.append('=');
+        filter.append(fSession.getId());
+        filter.append(')');
+        filter.append(')');
+        return filter.toString();
+    }
+
+    @ThreadSafe
+    public synchronized void dispose() {
         if (fServiceTracker != null) {
             fServiceTracker.close();
         }
@@ -101,7 +117,7 @@ public class SyncVariableDataAccess {
                 return;
             }
 
-            IExpressions service = getService(fDmc.getServiceFilter());
+            IExpressions service = getService();
             if (service == null) {
                 rm.setStatus(new Status(IStatus.ERROR, DsfDebugUIPlugin.PLUGIN_ID, IDsfService.INVALID_STATE, "Service not available", null)); //$NON-NLS-1$
                 rm.done();
@@ -202,7 +218,7 @@ public class SyncVariableDataAccess {
             /*
              * Guard against a disposed service
              */
-            IExpressions service = getService(fDmc.getServiceFilter());
+            IExpressions service = getService();
             if (service == null) {
                 rm.setStatus(new Status(IStatus.ERROR, DsfDebugUIPlugin.PLUGIN_ID, IDsfService.INVALID_STATE, "Service unavailable", null)); //$NON-NLS-1$
                 rm.done();
@@ -282,18 +298,18 @@ public class SyncVariableDataAccess {
         }
     }
 
-    public IFormattedDataDMContext<?> getFormattedDMC(Object element) {
+    public IFormattedDataDMContext getFormattedDMC(Object element) {
         if (element instanceof IAdaptable) {
-            return (IFormattedDataDMContext<?>) ((IAdaptable) element).getAdapter(IFormattedDataDMContext.class);
+            return (IFormattedDataDMContext) ((IAdaptable) element).getAdapter(IFormattedDataDMContext.class);
         }
         return null;
     }
     
     public class GetSupportFormatsValueQuery extends Query<Object> {
 
-        IFormattedDataDMContext<?> fDmc;
+        IFormattedDataDMContext fDmc;
 
-        public GetSupportFormatsValueQuery(IFormattedDataDMContext<?> dmc) {
+        public GetSupportFormatsValueQuery(IFormattedDataDMContext dmc) {
             super();
             fDmc = dmc;
         }
@@ -313,7 +329,7 @@ public class SyncVariableDataAccess {
             /*
              * Guard against a disposed service
              */
-            IExpressions service = getService(fDmc.getServiceFilter());
+            IExpressions service = getService();
             if (service == null) {
                 rm.setStatus(new Status(IStatus.ERROR, DsfDebugUIPlugin.PLUGIN_ID, IDsfService.INVALID_STATE, "Service unavailable", null)); //$NON-NLS-1$
                 rm.done();
@@ -358,7 +374,7 @@ public class SyncVariableDataAccess {
          * Get the DMC and the session. If element is not an register DMC, or
          * session is stale, then bail out.
          */
-        IFormattedDataDMContext<?> dmc = getFormattedDMC(element);
+        IFormattedDataDMContext dmc = getFormattedDMC(element);
         if (dmc == null) return null;
         DsfSession session = DsfSession.getSession(dmc.getSessionId());
         if (session == null) return null;
@@ -388,10 +404,10 @@ public class SyncVariableDataAccess {
 
     public class GetFormattedValueValueQuery extends Query<Object> {
 
-        private IFormattedDataDMContext<?> fDmc;
+        private IFormattedDataDMContext fDmc;
         private String fFormatId;
 
-        public GetFormattedValueValueQuery(IFormattedDataDMContext<?> dmc, String formatId) {
+        public GetFormattedValueValueQuery(IFormattedDataDMContext dmc, String formatId) {
             super();
             fDmc = dmc;
             fFormatId = formatId;
@@ -412,7 +428,7 @@ public class SyncVariableDataAccess {
             /*
              * Guard against a disposed service
              */
-            IExpressions service = getService(fDmc.getServiceFilter());
+            IExpressions service = getService();
             if (service == null) {
                 rm .setStatus(new Status(IStatus.ERROR, DsfDebugUIPlugin.PLUGIN_ID, IDsfService.INVALID_STATE, "Service unavailable", null)); //$NON-NLS-1$
                 rm.done();
@@ -456,7 +472,7 @@ public class SyncVariableDataAccess {
          * Get the DMC and the session. If element is not an register DMC, or
          * session is stale, then bail out.
          */
-        IFormattedDataDMContext<?> dmc = getFormattedDMC(element);
+        IFormattedDataDMContext dmc = getFormattedDMC(element);
         if (dmc == null) return null;
         DsfSession session = DsfSession.getSession(dmc.getSessionId());
         if (session == null) return null;

plugins/org.eclipse.dd.dsf.debug.ui/src/org/eclipse/dd/dsf/debug/ui/viewmodel/variable/VariableLayoutNode.java

@@ -19,7 +19,6 @@ import org.eclipse.dd.dsf.concurrent.MultiRequestMonitor;
 import org.eclipse.dd.dsf.concurrent.RequestMonitor;
 import org.eclipse.dd.dsf.datamodel.DMContexts;
 import org.eclipse.dd.dsf.datamodel.IDMContext;
-import org.eclipse.dd.dsf.datamodel.IDMService;
 import org.eclipse.dd.dsf.debug.service.IExpressions;
 import org.eclipse.dd.dsf.debug.service.IFormattedValues;
 import org.eclipse.dd.dsf.debug.service.IRunControl;
@@ -63,7 +62,7 @@ import org.eclipse.jface.viewers.TextCellEditor;
 import org.eclipse.swt.widgets.Composite;
 
 @SuppressWarnings({"restriction", "nls"})
-public class VariableLayoutNode extends AbstractExpressionLayoutNode<IExpressionDMData> implements IElementEditor {
+public class VariableLayoutNode extends AbstractExpressionLayoutNode implements IElementEditor {
     
     /** 
      * List of child nodes containing only a reference to this.  This is what enables the view model
@@ -126,7 +125,7 @@ public class VariableLayoutNode extends AbstractExpressionLayoutNode<IExpression
         
         private IExpression fExpression;
         
-        public VariableExpressionVMC(IDMContext<?> dmc) {
+        public VariableExpressionVMC(IDMContext dmc) {
             super(dmc);
         }
 
@@ -208,7 +207,7 @@ public class VariableLayoutNode extends AbstractExpressionLayoutNode<IExpression
     }
 
     @Override
-    protected IVMContext createVMContext(IDMContext<IExpressionDMData> dmc) {
+    protected IVMContext createVMContext(IDMContext dmc) {
         return new VariableExpressionVMC(dmc);
     }
     
@@ -225,7 +224,7 @@ public class VariableLayoutNode extends AbstractExpressionLayoutNode<IExpression
             final IExpressionDMContext dmc = findDmcInPath(update.getElementPath(), IExpressions.IExpressionDMContext.class);
             
             VMCacheManager.getVMCacheManager().getCache(update.getPresentationContext())
-				.getModelData((IDMService)getServicesTracker().getService(null, dmc.getServiceFilter()),
+				.getModelData(getServicesTracker().getService(IExpressions.class, null),
 				dmc, 
                 new DataRequestMonitor<IExpressionDMData>(getSession().getExecutor(), null) { 
                     @Override
@@ -234,7 +233,7 @@ public class VariableLayoutNode extends AbstractExpressionLayoutNode<IExpression
                         // fail if the state of the  service changed during the request, but the view model
                         // has not been updated yet.
                         
-                        if (!getStatus().isOK() || !getData().isValid()) {
+                        if (!getStatus().isOK()) {
                             assert getStatus().isOK() || 
                                    getStatus().getCode() != IDsfService.INTERNAL_ERROR || 
                                    getStatus().getCode() != IDsfService.NOT_SUPPORTED;

plugins/org.eclipse.dd.dsf.debug.ui/src/org/eclipse/dd/dsf/debug/ui/viewmodel/variable/VariableVMProvider.java

@@ -28,7 +28,7 @@ public class VariableVMProvider extends AbstractDebugDMVMProviderWithCache imple
         /*
          *  Create the variable data access routines.
          */
-        SyncVariableDataAccess varAccess = new SyncVariableDataAccess() ;
+        SyncVariableDataAccess varAccess = new SyncVariableDataAccess(session) ;
 
         /*
          *  Create the top level node to deal with the root selection.

plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/model/DsfMemoryBlockRetrieval.java

@@ -66,7 +66,7 @@ public class DsfMemoryBlockRetrieval extends PlatformObject implements IMemoryBl
 	private final String fModelId;
 	private final DsfSession fSession;
 	private final DsfExecutor fExecutor;
-	private       IDMContext<?> fContext;
+	private       IDMContext fContext;
 	private final ServiceTracker fMemoryServiceTracker;
 	private final ServiceTracker fExpressionServiceTracker;
 
@@ -77,7 +77,7 @@ public class DsfMemoryBlockRetrieval extends PlatformObject implements IMemoryBl
 	 * @param dmc
 	 * @throws DebugException
 	 */
-	public DsfMemoryBlockRetrieval(String modelId, IDMContext<?> dmc) throws DebugException {
+	public DsfMemoryBlockRetrieval(String modelId, IDMContext dmc) throws DebugException {
 
 		fModelId = modelId;
 		fContext = dmc;
@@ -143,7 +143,7 @@ public class DsfMemoryBlockRetrieval extends PlatformObject implements IMemoryBl
 		return fExecutor;
 	}
 
-	public IDMContext<?> getContext() {
+	public IDMContext getContext() {
 		return fContext;
 	}
 
@@ -254,9 +254,9 @@ public class DsfMemoryBlockRetrieval extends PlatformObject implements IMemoryBl
 			// In case of failure, simply return 'null'
 
 			// Drill for the actual DMC
-		    IDMContext<?> dmc = null;
+		    IDMContext dmc = null;
 			if (context instanceof IAdaptable) {
-			    dmc = (IDMContext<?>)((IAdaptable)context).getAdapter(IDMContext.class);
+			    dmc = (IDMContext)((IAdaptable)context).getAdapter(IDMContext.class);
 			}
 
 			if (dmc == null) {
@@ -293,7 +293,7 @@ public class DsfMemoryBlockRetrieval extends PlatformObject implements IMemoryBl
 	// Helper functions
 	// ////////////////////////////////////////////////////////////////////////
 
-	private BigInteger resolveMemoryAddress(final IDMContext<?> idmContext, final String expression) throws DebugException {
+	private BigInteger resolveMemoryAddress(final IDMContext idmContext, final String expression) throws DebugException {
 
 		// Use a Query to "synchronise" the downstream calls
 		Query<BigInteger> query = new Query<BigInteger>() {
@@ -312,15 +312,13 @@ public class DsfMemoryBlockRetrieval extends PlatformObject implements IMemoryBl
 							FormattedValueDMContext valueDmc = expressionService.getFormattedValueContext(expressionDMC, formatId);
 			                expressionService.getModelData(
 			                	valueDmc, 
-			                    new DataRequestMonitor<FormattedValueDMData>(getExecutor(), null) {
+			                    new DataRequestMonitor<FormattedValueDMData>(getExecutor(), drm) {
 			            			@Override
 			            			protected void handleOK() {
 			            				// Store the result
 			            				FormattedValueDMData data = getData();
-			            				if (data.isValid()) {
+		            					String value = data.getFormattedValue().substring(2);	// Strip the "0x"
-			            					String value = data.getFormattedValue().substring(2);	// Strip the "0x"
+		            					drm.setData(new BigInteger(value, 16));
-			            					drm.setData(new BigInteger(value, 16));
-			            				}
 			            				drm.done();
 			            			}
 			                	}

plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/IBreakpoints.java

@@ -28,7 +28,7 @@ public interface IBreakpoints extends IDMService {
    
     public enum BreakpointStatus { INSTALLED, FAILED_TO_INSTALL, FILTERED_OUT }
     
-    public interface IBreakpointDMContext extends IDMContext<IBreakpointDMData> {}
+    public interface IBreakpointDMContext extends IDMContext {}
     
     public interface IBreakpointDMData extends IDMData {
         IBreakpoint getPlatformBreakpoint();
@@ -43,7 +43,7 @@ public interface IBreakpoints extends IDMService {
     
     public interface IBreakpointHitEvent extends IBreakpointDMEvent {}
     
-    public void getAllBreakpoints(IDMContext<?> execDmc, DataRequestMonitor<IBreakpointDMContext[]> rm);
+    public void getAllBreakpoints(IDMContext ctx, DataRequestMonitor<IBreakpointDMContext[]> rm);
-    public void getBreakpoints(IDMContext<?> execDmc, IBreakpoint platformBp, DataRequestMonitor<IBreakpointDMContext[]> rm);
+    public void getBreakpoints(IDMContext ctx, IBreakpoint platformBp, DataRequestMonitor<IBreakpointDMContext[]> rm);
 }
 

plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/IExpressions.java

@@ -32,7 +32,7 @@ public interface IExpressions extends IDMService, IFormattedValues {
      * Expression context. Since some expressions have children, expression contexts can have an
      * arbitrary number of parents of type IExpressionDMContext.
      */
-    public interface IExpressionDMContext extends IFormattedDataDMContext<IExpressionDMData> {
+    public interface IExpressionDMContext extends IFormattedDataDMContext {
         /**
          * Returns a fully qualified expression string represented by this context.  This 
          * expression string is the same as the string that is sent to the debug engine to be
@@ -149,7 +149,7 @@ public interface IExpressions extends IDMService, IFormattedValues {
      * @return  An expression data model context object that must be passed to getModelData() to obtain the
      *          value of the expression.
      */
-    IExpressionDMContext createExpression(IDMContext<?> ctx, String expression);
+    IExpressionDMContext createExpression(IDMContext ctx, String expression);
 
     /**
      * Retrieves the sub-expressions of the given expression.  Sub-expressions are fields of a struct, union,
@@ -208,5 +208,5 @@ public interface IExpressions extends IDMService, IFormattedValues {
      * 
      * @param rm: Request completion monitor.
      */
-    void writeExpression(IDMContext<?> expressionContext, String exressionValue, String formatId, RequestMonitor rm);
+    void writeExpression(IDMContext expressionContext, String exressionValue, String formatId, RequestMonitor rm);
 }

plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/IFormattedValues.java

@@ -20,7 +20,7 @@ import org.eclipse.dd.dsf.datamodel.IDMService;
 public interface IFormattedValues extends IDMService {
     
     /** Marker interface for a DMC that has a formatted value. */
-    public interface IFormattedDataDMContext<V extends IDMData> extends IDMContext<V> {}
+    public interface IFormattedDataDMContext extends IDMContext {}
 
     /**
      * These strings represent the standard known formats for any bit stream
@@ -43,7 +43,7 @@ public interface IFormattedValues extends IDMService {
      * @param dmc Context for which to retrieve available formats.
      * @param rm Completion monitor returns an array of support formatIds.  
      */
-    public void getAvailableFormats(IFormattedDataDMContext<?> dmc, DataRequestMonitor<String[]> rm);
+    public void getAvailableFormats(IFormattedDataDMContext dmc, DataRequestMonitor<String[]> rm);
         
     /**
      * Creates a FormattedValueDMContext representing the given formatId.  
@@ -51,24 +51,24 @@ public interface IFormattedValues extends IDMService {
      * @param dmc Parent context for the context that is being created
      * @param formatId Defines format to be used for the returned context.
      */
-    public FormattedValueDMContext getFormattedValueContext(IFormattedDataDMContext<?> dmc, String formatId);
+    public FormattedValueDMContext getFormattedValueContext(IFormattedDataDMContext dmc, String formatId);
     
     /**
      * DMC that represents a value with specific format.  The format ID can be
      * persisted and used for comparison. 
      */
 
-    public static class FormattedValueDMContext extends AbstractDMContext<FormattedValueDMData> 
+    public static class FormattedValueDMContext extends AbstractDMContext 
     {
         private final String fFormatID;
         
-        public FormattedValueDMContext(IDMService service, IDMContext<?> parent, String formatId) {
+        public FormattedValueDMContext(IDMService service, IDMContext parent, String formatId) {
             super(service, new IDMContext[] { parent });
             fFormatID = formatId;
         }
 
-        public FormattedValueDMContext(String sessionId, String filter, IDMContext<?> parent, String formatId) {
+        public FormattedValueDMContext(String sessionId, IDMContext parent, String formatId) {
-            super(sessionId, filter, new IDMContext[] { parent });
+            super(sessionId, new IDMContext[] { parent });
             fFormatID = formatId;
         }
         
@@ -103,10 +103,5 @@ public interface IFormattedValues extends IDMService {
         public String getFormattedValue() {
             return fValue;
         }
-        
-        public boolean isValid() {
-            return true;
-        }
-        
     }
 }

plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/IMemory.java

@@ -50,14 +50,14 @@ public interface IMemory extends IDsfService {
 	 */
     public class MemoryChangedEvent {
         IAddress[] fAddresses;
-        IDMContext<?> fContext;
+        IDMContext fContext;
         
-        public MemoryChangedEvent(IDMContext<?> context, IAddress[] addresses) {
+        public MemoryChangedEvent(IDMContext context, IAddress[] addresses) {
         	fContext = context;
         	fAddresses = addresses;
         }
 
-        public IDMContext<?> getContext() {
+        public IDMContext getContext() {
             return fContext;
         }
 
@@ -86,7 +86,7 @@ public interface IMemory extends IDsfService {
      * @param count		the number of data elements to read
      * @param drm		the asynchronous data request monitor
      */
-    public void getMemory(IDMContext<?> context, IAddress address, long offset,
+    public void getMemory(IDMContext context, IAddress address, long offset,
     		int word_size, int count, DataRequestMonitor<MemoryByte[]> drm);
 
     /**
@@ -107,7 +107,7 @@ public interface IMemory extends IDsfService {
      * @param buffer	the source buffer
      * @param rm		the asynchronous data request monitor
      */
-    public void setMemory(IDMContext<?> context, IAddress address, long offset,
+    public void setMemory(IDMContext context, IAddress address, long offset,
     		int word_size, int count, byte[] buffer, RequestMonitor rm);
 
     /**
@@ -123,7 +123,7 @@ public interface IMemory extends IDsfService {
      * @param pattern	the source buffer
      * @param rm		the asynchronous data request monitor
      */
-    public void fillMemory(IDMContext<?> context, IAddress address, long offset,
+    public void fillMemory(IDMContext context, IAddress address, long offset,
     		int word_size, int count, byte[] pattern, RequestMonitor rm);
 
 }

plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/IModules.java

@@ -30,12 +30,12 @@ public interface IModules extends IDMService {
      * types of debugging, like kernel or no-OS debugging, it's useful to 
      * separate the concept of a symbol context from a process.
      */
-    public interface ISymbolDMContext extends IDMContext<ISymbolDMData>{}
+    public interface ISymbolDMContext extends IDMContext {}
     
     /**
      * Module context represents a single module that is loaded.
      */
-    public interface IModuleDMContext extends IDMContext<IModuleDMData> {}
+    public interface IModuleDMContext extends IDMContext {}
     
     /**
      * Event indicating a change in the symbol information for given context.
@@ -101,7 +101,7 @@ public interface IModules extends IDMService {
     }
     
     /** Module information. */
-    public interface IModuleDMData extends IDMData {
+    public interface IModuleDMData {
         String getName();
         String getFile();
         long getTimeStamp();
@@ -134,16 +134,16 @@ public interface IModules extends IDMService {
     /** 
      * Retreives the list of modules loaded in given symbol context. 
      */ 
-    void getModules(IDMContext<?> symCtx, DataRequestMonitor<IModuleDMContext[]> rm);
+    void getModules(IDMContext symCtx, DataRequestMonitor<IModuleDMContext[]> rm);
 
     /**
      * Calculates the line numbers corresponding to the given address. 
      */
-    void calcLineInfo(IDMContext<?> symCtx, IAddress address, DataRequestMonitor<LineInfo[]> rm);
+    void calcLineInfo(IDMContext symCtx, IAddress address, DataRequestMonitor<LineInfo[]> rm);
     
     /**
      * Calculates the addresses corresponding to the given source file location.
      */
-    void calcAddressInfo(IDMContext<?> symCtx, String file, int line, int col, DataRequestMonitor<AddressRange[]> rm);
+    void calcAddressInfo(IDMContext symCtx, String file, int line, int col, DataRequestMonitor<AddressRange[]> rm);
 
 }

plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/INativeProcesses.java

@@ -26,8 +26,8 @@ import org.eclipse.dd.dsf.datamodel.IDMService;
  */
 public interface INativeProcesses extends IDMService {
     
-    public interface IThreadDMContext extends IDMContext<IThreadDMData> {}
+    public interface IThreadDMContext extends IDMContext {}
-    public interface IProcessDMContext extends IDMContext<IProcessDMData> {}
+    public interface IProcessDMContext extends IDMContext {}
 
     /**
      * Interface for thread and process object data.  
@@ -36,7 +36,7 @@ public interface INativeProcesses extends IDMService {
         String getName();
         String getId();
         boolean isDebuggerAttached();
-        IDMContext<?> getDebugContext();
+        IDMContext getDebugContext();
     }
 
     /**
@@ -46,7 +46,7 @@ public interface INativeProcesses extends IDMService {
         String getName();
         String getId();
         boolean isDebuggerAttached();
-        IDMContext<?> getDebugContext();
+        IDMContext getDebugContext();
     }
 
     /**
@@ -55,11 +55,11 @@ public interface INativeProcesses extends IDMService {
     public interface IProcessChangedDMEvent extends IDMEvent<IProcessDMContext> {}
 
 
-    public interface IProcessStartedEvent extends IDMEvent<IDMContext<INativeProcesses>> {
+    public interface IProcessStartedEvent extends IDMEvent<IDMContext> {
         IProcessDMContext getProcess();
     } 
 
-    public interface IProcessExitedEvent extends IDMEvent<IDMContext<INativeProcesses>> {
+    public interface IProcessExitedEvent extends IDMEvent<IDMContext> {
         IProcessDMContext getProcess();
     } 
     
@@ -69,13 +69,13 @@ public interface INativeProcesses extends IDMService {
      * @param execCtx
      * @return
      */
-    public IThreadDMContext getThreadForDebugContext(IDMContext<?> execCtx);
+    public IThreadDMContext getThreadForDebugContext(IDMContext execCtx);
 
     /**
      * Returns a process context corresponding to the given context. <code>null</code> if no 
      * corresponding process exists.    
      */
-    public IProcessDMContext getProcessForDebugContext(IDMContext<?> execCtx);
+    public IProcessDMContext getProcessForDebugContext(IDMContext execCtx);
     
     /**
      * Retrieves the current list of processes running on target.
@@ -114,13 +114,13 @@ public interface INativeProcesses extends IDMService {
      * @param thread Thread or process to terminate.
      * @param rm Return token.
      */
-    void canTerminate(IDMContext<?> ctx, DataRequestMonitor<Boolean> rm);
+    void canTerminate(IDMContext ctx, DataRequestMonitor<Boolean> rm);
 
     /**
      * Terminates the selected process or thread.
      * @param thread Thread or process to terminate.
      * @param rm Request completion monitor, indicates success or failure.
      */
-    void terminate(IDMContext<?> ctx, RequestMonitor requestMonitor);
+    void terminate(IDMContext ctx, RequestMonitor requestMonitor);
 
 }

plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/IOS.java

@@ -10,8 +10,8 @@
  *******************************************************************************/
 package org.eclipse.dd.dsf.debug.service;
 
-import org.eclipse.dd.dsf.concurrent.RequestMonitor;
 import org.eclipse.dd.dsf.concurrent.DataRequestMonitor;
+import org.eclipse.dd.dsf.concurrent.RequestMonitor;
 import org.eclipse.dd.dsf.datamodel.IDMContext;
 import org.eclipse.dd.dsf.datamodel.IDMData;
 import org.eclipse.dd.dsf.datamodel.IDMService;
@@ -30,7 +30,7 @@ public interface IOS extends IDMService {
      * Context object for the whole OS, for debuggers that support 
      * debugging multiple targets/cores simultaneously.
      */
-    public interface IOSDMContext extends IDMContext<IOSDMData> {}
+    public interface IOSDMContext extends IDMContext {}
 
     /**
      * Data object describing OS info
@@ -44,7 +44,7 @@ public interface IOS extends IDMService {
     /**
      * Context for a OS object type, such as process, kernel task, semaphore, etc.
      */
-    public interface IObjectTypeDMContext extends IDMContext<IObjectTypeDMData> {}
+    public interface IObjectTypeDMContext extends IDMContext {}
     
     /**
      * Description data for a OS object type.
@@ -59,7 +59,7 @@ public interface IOS extends IDMService {
     /**
      * OS object context.
      */
-    public interface IObjectDMContext extends IDMContext<IObjectDMData> {}
+    public interface IObjectDMContext extends IDMContext {}
 
     /**
      * Description data for an OS object.
@@ -69,7 +69,7 @@ public interface IOS extends IDMService {
         String getID();
         boolean canAttachDebugger();
         boolean isDebuggerAttached(); 
-        IDMContext<?> getDebuggingContext();
+        IDMContext getDebuggingContext();
     }
     
     /**

plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/IRegisters.java

@@ -25,7 +25,7 @@ public interface IRegisters extends IFormattedValues {
     public interface IGroupsChangedDMEvent extends IDMEvent<IRunControl.IExecutionDMContext> {}
 
     /** Register group context */
-    public interface IRegisterGroupDMContext extends IFormattedDataDMContext<IRegisterGroupDMData> {
+    public interface IRegisterGroupDMContext extends IFormattedDataDMContext {
         public String getName();
     }
     
@@ -45,7 +45,7 @@ public interface IRegisters extends IFormattedValues {
     }
 
     /** Register context */
-    public interface IRegisterDMContext extends IFormattedDataDMContext<IRegisterDMData> {
+    public interface IRegisterDMContext extends IFormattedDataDMContext {
         public String getName();
     }
     
@@ -66,7 +66,7 @@ public interface IRegisters extends IFormattedValues {
     }
 
     /** Bit field context */
-    public interface IBitFieldDMContext extends IFormattedDataDMContext<IBitFieldDMData> {
+    public interface IBitFieldDMContext extends IFormattedDataDMContext {
         public String getName();
     }
 
@@ -109,28 +109,28 @@ public interface IRegisters extends IFormattedValues {
      * @param ctx Context for the returned data.
      * @param rm Request completion monitor.
      */
-    void getRegisterGroups(IDMContext<?> ctx, DataRequestMonitor<IRegisterGroupDMContext[]> rm);
+    void getRegisterGroups(IDMContext ctx, DataRequestMonitor<IRegisterGroupDMContext[]> rm);
     
     /** 
      * Retrieves list of sub-groups of given register group. 
      * @param ctx Context for the returned data.
      * @param rm Request completion monitor.
      */
-    void getRegisterSubGroups(IDMContext<?> ctx, DataRequestMonitor<IRegisterGroupDMContext[]> rm);
+    void getRegisterSubGroups(IDMContext ctx, DataRequestMonitor<IRegisterGroupDMContext[]> rm);
     
     /** 
      * Retrieves registers in given register group.
      * @param ctx Context for the returned data.
      * @param rm Request completion monitor.
      */
-    void getRegisters(IDMContext<?> ctx, DataRequestMonitor<IRegisterDMContext[]> rm);
+    void getRegisters(IDMContext ctx, DataRequestMonitor<IRegisterDMContext[]> rm);
     
     /** 
      * Retrieves bit fields for given register
      * @param ctx Context for the returned data.
      * @param rm Request completion monitor.
      */
-    void getBitFields(IDMContext<?> ctx, DataRequestMonitor<IBitFieldDMContext[]> rm);
+    void getBitFields(IDMContext ctx, DataRequestMonitor<IBitFieldDMContext[]> rm);
     
     /** 
      * Writes a register value for a given register to the target
@@ -139,7 +139,7 @@ public interface IRegisters extends IFormattedValues {
      * @param formatId Format of the value to be written.
      * @param rm Request completion monitor.
      */
-    void writeRegister(IDMContext<?> regCtx, String regValue, String formatId, RequestMonitor rm);
+    void writeRegister(IDMContext regCtx, String regValue, String formatId, RequestMonitor rm);
     
     /** 
      * Writes a bit field value for a given bit field to the target
@@ -148,7 +148,7 @@ public interface IRegisters extends IFormattedValues {
      * @param formatId Format of the value to be written.
      * @param rm Request completion monitor.
      */
-    void writeBitField(IDMContext<?> bitFieldCtx, String bitFieldValue, String formatId, RequestMonitor rm);
+    void writeBitField(IDMContext bitFieldCtx, String bitFieldValue, String formatId, RequestMonitor rm);
     
     /** 
      * Writes a bit field value for a given bit field to the target
@@ -156,5 +156,5 @@ public interface IRegisters extends IFormattedValues {
      * @param mnemonic Mnemonic which represents the value to be written.
      * @param rm Request completion monitor.
      */
-    void writeBitField(IDMContext<?> bitFieldCtx, IMnemonic mnemonic, RequestMonitor rm);
+    void writeBitField(IDMContext bitFieldCtx, IMnemonic mnemonic, RequestMonitor rm);
 }

plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/IRunControl.java

@@ -33,7 +33,7 @@ public interface IRunControl extends IDMService
      * performed.  A lot of higher-level services reference this context to build
      * functionality on top of it, e.g. stack, expression evaluation, registers, etc.
      */
-    public interface IExecutionDMContext extends IDMContext<IExecutionDMData> {}
+    public interface IExecutionDMContext extends IDMContext {}
     
     /**
      * Context representing a process, kernel, or some other logical container 
@@ -95,15 +95,15 @@ public interface IRunControl extends IDMService
      * Run control commands.  They all require the IExecutionContext object on 
      * which they perform the operations.  
      */
-    boolean canResume(IDMContext<?> context);
+    boolean canResume(IDMContext context);
-    boolean canSuspend(IDMContext<?> context);
+    boolean canSuspend(IDMContext context);
-    boolean isSuspended(IDMContext<?> context);
+    boolean isSuspended(IDMContext context);
-    void resume(IDMContext<?> context, RequestMonitor requestMonitor);
+    void resume(IDMContext context, RequestMonitor requestMonitor);
-    void suspend(IDMContext<?> context, RequestMonitor requestMonitor);
+    void suspend(IDMContext context, RequestMonitor requestMonitor);
     public enum StepType { STEP_OVER, STEP_INTO, STEP_RETURN };
-    boolean isStepping(IDMContext<?> context);
+    boolean isStepping(IDMContext context);
-    boolean canStep(IDMContext<?> context);
+    boolean canStep(IDMContext context);
-    void step(IDMContext<?> context, StepType stepType, RequestMonitor requestMonitor);
+    void step(IDMContext context, StepType stepType, RequestMonitor requestMonitor);
-    boolean canInstructionStep(IDMContext<?> context);
+    boolean canInstructionStep(IDMContext context);
-    void instructionStep(IDMContext<?> context, StepType stepType, RequestMonitor requestMonitor);
+    void instructionStep(IDMContext context, StepType stepType, RequestMonitor requestMonitor);
 }

plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/ISourceLookup.java

@@ -12,7 +12,6 @@ package org.eclipse.dd.dsf.debug.service;
 
 import org.eclipse.dd.dsf.concurrent.DataRequestMonitor;
 import org.eclipse.dd.dsf.datamodel.IDMContext;
-import org.eclipse.dd.dsf.datamodel.IDMData;
 import org.eclipse.dd.dsf.datamodel.IDMEvent;
 import org.eclipse.dd.dsf.service.IDsfService;
 
@@ -24,17 +23,17 @@ import org.eclipse.dd.dsf.service.IDsfService;
  */
 public interface ISourceLookup extends IDsfService {
 
-    public interface ISourceLookupDMContext extends IDMContext<IDMData> {}
+    public interface ISourceLookupDMContext extends IDMContext {}
         
     public interface ISourceLookupChangedDMEvent extends IDMEvent<ISourceLookupDMContext> {}
     
     /**
      * Retrieves the host source object for given debugger path string.
      */
-    void getSource(IDMContext<?> ctx, String debuggerPath, DataRequestMonitor<Object> rm);
+    void getSource(IDMContext ctx, String debuggerPath, DataRequestMonitor<Object> rm);
     
     /**
      * Retrieves the debugger path string for given host source object.
      */
-    void getDebuggerPath(IDMContext<?> ctx, Object source, DataRequestMonitor<String> rm);
+    void getDebuggerPath(IDMContext ctx, Object source, DataRequestMonitor<String> rm);
 }

plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/IStack.java

@@ -27,7 +27,7 @@ public interface IStack extends IDMService {
      * frame data, this context is used by other services that require a stack
      * frame for evaluation.  
      */
-    public interface IFrameDMContext extends IDMContext<IFrameDMData> {}
+    public interface IFrameDMContext extends IDMContext {}
 
     /**
      * Stack frame information. 
@@ -46,7 +46,7 @@ public interface IStack extends IDMService {
      * expression information.  For displaying complete information, 
      * Expressions service should be used.
      */
-    public interface IVariableDMContext extends IDMContext<IVariableDMData> {}
+    public interface IVariableDMContext extends IDMContext {}
 
     /** 
      * Stack frame variable information.
@@ -59,13 +59,13 @@ public interface IStack extends IDMService {
     /**
      * Returns whether the stack frames can be retrieved for given thread.
      */
-    boolean isStackAvailable(IDMContext<?> execContext);
+    boolean isStackAvailable(IDMContext execContext);
     
     /**
      * Retrieves list of stack frames for the given execution context.  Request
      * will fail if the stack frame data is not available.
      */
-    void getFrames(IDMContext<?> execContext, DataRequestMonitor<IFrameDMContext[]> rm);
+    void getFrames(IDMContext execContext, DataRequestMonitor<IFrameDMContext[]> rm);
     
     /**
      * Retrieves the top stack frame for the given execution context.  
@@ -76,17 +76,17 @@ public interface IStack extends IDMService {
      * @param execContext
      * @param rm
      */
-    void getTopFrame(IDMContext<?> execContext, DataRequestMonitor<IFrameDMContext> rm);
+    void getTopFrame(IDMContext execContext, DataRequestMonitor<IFrameDMContext> rm);
     
     /**
      * Retrieves variables which were arguments to the stack frame's function.
      */
-    void getArguments(IDMContext<?> frameCtx, DataRequestMonitor<IVariableDMContext[]> rm);
+    void getArguments(IDMContext frameCtx, DataRequestMonitor<IVariableDMContext[]> rm);
     
     /**
      * Retrieves variables local to the stack frame.
      */
-    void getLocals(IDMContext<?> frameCtx, DataRequestMonitor<IVariableDMContext[]> rm);
+    void getLocals(IDMContext frameCtx, DataRequestMonitor<IVariableDMContext[]> rm);
     
     /**
      * Retrieves the stack depth of the specified stack frame.

plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/IStepQueueManager.java

@@ -46,21 +46,21 @@ public interface IStepQueueManager extends IDsfService {
      * Returns the number of step commands that are queued for given execution
      * context.
      */
-    int getPendingStepCount(IDMContext<?> ctx);
+    int getPendingStepCount(IDMContext ctx);
 
     /**
      * Checks whether a step command can be queued up for given context.
      */
-    boolean canEnqueueStep(IDMContext<?> execCtx);
+    boolean canEnqueueStep(IDMContext execCtx);
 
-    boolean canEnqueueInstructionStep(IDMContext<?> ctx);
+    boolean canEnqueueInstructionStep(IDMContext ctx);
 
     /**
      * Adds a step command to the execution queue for given context.
      * @param execCtx Execution context that should perform the step. 
      * @param stepType Type of step to execute.
      */
-    void enqueueStep(IDMContext<?> ctx, IRunControl.StepType stepType);
+    void enqueueStep(IDMContext ctx, IRunControl.StepType stepType);
     
     /**
      * Adds an instruction step command to the execution queue for given 
@@ -68,7 +68,7 @@ public interface IStepQueueManager extends IDsfService {
      * @param execCtx Execution context that should perform the step. 
      * @param stepType Type of step to execute.
      */
-    void enqueueInstructionStep(IDMContext<?> ctx, IRunControl.StepType stepType);
+    void enqueueInstructionStep(IDMContext ctx, IRunControl.StepType stepType);
 
-    boolean isSteppingTimedOut(IDMContext<?> context);
+    boolean isSteppingTimedOut(IDMContext context);
 }

plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/ISymbols.java

@@ -23,7 +23,7 @@ import org.eclipse.dd.dsf.datamodel.IDMService;
  * @see IModules
  */
 public interface ISymbols extends IDMService {
-    public interface ISymbolObjectDMContext extends IDMContext<ISymbolObjectDMData> {}
+    public interface ISymbolObjectDMContext extends IDMContext {}
     
     /**
      * Data about a debug symbol.  

plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/ITargets.java

@@ -22,7 +22,7 @@ import org.eclipse.dd.dsf.datamodel.IDMService;
  */
 public interface ITargets extends IDMService {
 
-    public interface ITargetDMContext extends IDMContext<ITargetDMData> {}
+    public interface ITargetDMContext extends IDMContext {}
     
     public interface ITargetDMData extends IDMData {
         String getName();
@@ -31,7 +31,7 @@ public interface ITargets extends IDMService {
     
     public interface ITargetStateChanged extends IDMEvent<ITargetDMContext> {}
     
-    public interface ICoreDMContext extends IDMContext<ICoreDMData> {}
+    public interface ICoreDMContext extends IDMContext {}
 
     public interface ICoreDMData extends IDMData {
         String getName();

plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/service/command/ICommand.java

@@ -39,7 +39,7 @@ public interface ICommand<V extends ICommandResult> {
      * Returns the context that this command is to be evaluated in.  May be null
      * if the command does not need to be evaluated in a specific context.
      */
-    public IDMContext<?> getContext();
+    public IDMContext getContext();
 }
 
     

plugins/org.eclipse.dd.dsf.debug/src/org/eclipse/dd/dsf/debug/sourcelookup/DsfMISourceLookupParticipant.java

@@ -176,13 +176,13 @@ public class DsfMISourceLookupParticipant implements ISourceLookupParticipant {
 	 * @see org.eclipse.debug.internal.core.sourcelookup.ISourceLookupParticipant#getSourceName(java.lang.Object)
 	 */
 	public String getSourceName(Object object) throws CoreException {
-		if ( !(object instanceof IDMContext<?>) || 
+		if ( !(object instanceof IDMContext) || 
-             !((IDMContext<?>)object).getSessionId().equals(fSessionId) ) 
+             !((IDMContext)object).getSessionId().equals(fSessionId) ) 
         {
             throw new CoreException(new Status(IStatus.ERROR, DsfDebugPlugin.PLUGIN_ID, -1, "Invalid object", null)); //$NON-NLS-1$
         }
         
-        final IDMContext<?> dmc = (IDMContext<?>)object;
+        final IDMContext dmc = (IDMContext)object;
         Query<String> query = new Query<String>() { 
             @Override
             protected void execute(final DataRequestMonitor<String> rm) {
@@ -202,7 +202,7 @@ public class DsfMISourceLookupParticipant implements ISourceLookupParticipant {
 	}
 
     @ConfinedToDsfExecutor("fExecutor")
-    private void getSourceNameOnDispatchThread(IDMContext<?> dmc, final DataRequestMonitor<String> rm) {
+    private void getSourceNameOnDispatchThread(IDMContext dmc, final DataRequestMonitor<String> rm) {
         if (!(dmc instanceof IStack.IFrameDMContext)) {
             rm.setStatus(new Status(IStatus.ERROR, DsfDebugPlugin.PLUGIN_ID, IDsfService.INVALID_HANDLE, "No source for this object", null)); //$NON-NLS-1$
             rm.done();

plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/dm/AbstractDMVMLayoutNode.java

@@ -22,9 +22,7 @@ import org.eclipse.dd.dsf.concurrent.Immutable;
 import org.eclipse.dd.dsf.concurrent.RequestMonitor;
 import org.eclipse.dd.dsf.datamodel.DMContexts;
 import org.eclipse.dd.dsf.datamodel.IDMContext;
-import org.eclipse.dd.dsf.datamodel.IDMData;
 import org.eclipse.dd.dsf.datamodel.IDMEvent;
-import org.eclipse.dd.dsf.datamodel.IDMService;
 import org.eclipse.dd.dsf.service.DsfServicesTracker;
 import org.eclipse.dd.dsf.service.DsfSession;
 import org.eclipse.dd.dsf.service.IDsfService;
@@ -34,21 +32,16 @@ import org.eclipse.dd.dsf.ui.viewmodel.AbstractVMProvider;
 import org.eclipse.dd.dsf.ui.viewmodel.IVMContext;
 import org.eclipse.dd.dsf.ui.viewmodel.IVMLayoutNode;
 import org.eclipse.dd.dsf.ui.viewmodel.VMDelta;
-import org.eclipse.dd.dsf.ui.viewmodel.update.VMCacheManager;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenCountUpdate;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenUpdate;
-import org.eclipse.debug.internal.ui.viewers.model.provisional.IColumnPresentationFactory;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IElementLabelProvider;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IHasChildrenUpdate;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.ILabelUpdate;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelDelta;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IViewerUpdate;
-import org.eclipse.jface.resource.ImageDescriptor;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.ITreeSelection;
 import org.eclipse.jface.viewers.TreePath;
-import org.eclipse.swt.graphics.FontData;
-import org.eclipse.swt.graphics.RGB;
 
 
 /**
@@ -58,7 +51,7 @@ import org.eclipse.swt.graphics.RGB;
  * are of the same class type.   
  */
 @SuppressWarnings("restriction")
-abstract public class AbstractDMVMLayoutNode<V extends IDMData> extends AbstractVMLayoutNode 
+abstract public class AbstractDMVMLayoutNode extends AbstractVMLayoutNode 
     implements IElementLabelProvider
 {
 
@@ -67,14 +60,14 @@ abstract public class AbstractDMVMLayoutNode<V extends IDMData> extends Abstract
      */
     @Immutable
     public class DMVMContext extends AbstractVMContext {
-        private final IDMContext<?> fDmc;
+        private final IDMContext fDmc;
         
-        public DMVMContext(IDMContext<?> dmc) {
+        public DMVMContext(IDMContext dmc) {
             super(getVMProvider().getVMAdapter(), AbstractDMVMLayoutNode.this);
             fDmc = dmc;
         }
         
-        public IDMContext<?> getDMC() { return fDmc; }
+        public IDMContext getDMC() { return fDmc; }
         
         /**
          * The IAdaptable implementation.  If the adapter is the DM context, 
@@ -122,7 +115,7 @@ abstract public class AbstractDMVMLayoutNode<V extends IDMData> extends Abstract
      * this type is erased at runtime, so a concrete class typs of the DMC
      * is needed for instanceof chacks.  
      */
-    private Class<? extends IDMContext<V>> fDMCClassType;
+    private Class<? extends IDMContext> fDMCClassType;
 
     /** 
      * Constructor initializes instance data, except for the child nodes.  
@@ -131,7 +124,7 @@ abstract public class AbstractDMVMLayoutNode<V extends IDMData> extends Abstract
      * @param dmcClassType
      * @see #setChildNodes(IVMLayoutNode[])
      */
-    public AbstractDMVMLayoutNode(AbstractVMProvider provider, DsfSession session, Class<? extends IDMContext<V>> dmcClassType) {
+    public AbstractDMVMLayoutNode(AbstractVMProvider provider, DsfSession session, Class<? extends IDMContext> dmcClassType) {
         super(provider);
         fSession = session;
         fServicesTracker = new DsfServicesTracker(DsfUIPlugin.getBundleContext(), session.getId());
@@ -161,7 +154,7 @@ abstract public class AbstractDMVMLayoutNode<V extends IDMData> extends Abstract
         Object element = update.getElement(); 
         if (element instanceof AbstractDMVMLayoutNode.DMVMContext) {
             // If update element is a DMC, check if session is still alive.
-            IDMContext<?> dmc = ((DMVMContext)element).getDMC();
+            IDMContext dmc = ((DMVMContext)element).getDMC();
             if (dmc.getSessionId() != getSession().getId() || !DsfSession.isSessionActive(dmc.getSessionId())) {
                 handleFailedUpdate(update);
                 return false;
@@ -177,7 +170,7 @@ abstract public class AbstractDMVMLayoutNode<V extends IDMData> extends Abstract
      * @param update Update to handle in case the DMC is null.
      * @return true if the DMC is NOT null, indicating that it's OK to proceed.  
      */
-    protected boolean checkDmc(IDMContext<?> dmc, IViewerUpdate update) {
+    protected boolean checkDmc(IDMContext dmc, IViewerUpdate update) {
         if (dmc == null) {
             update.setStatus(new Status(IStatus.ERROR, DsfUIPlugin.PLUGIN_ID, IDsfService.INVALID_STATE, 
                                         "No valid context found.", null)); //$NON-NLS-1$
@@ -306,77 +299,7 @@ abstract public class AbstractDMVMLayoutNode<V extends IDMData> extends Abstract
         }
     }
     
-    /**
+    abstract protected void updateLabelInSessionThread(ILabelUpdate[] updates);
-     * The default implementation of the retrieve label method.  It acquires 
-     * the service, using parameters in the DMC, then it fetches the model 
-     * data from the service, and then it calls the protected method 
-     * fillColumnLabel() for each column.  The deriving classes should override
-     * this method if a different method of computing the label is needed.
-     * 
-     * @see #fillColumnLabel(IDMData, String, int, String[], ImageDescriptor[], FontData[], RGB[], RGB[])
-     */
-    protected void updateLabelInSessionThread(ILabelUpdate[] updates) {
-        for (final ILabelUpdate update : updates) {
-            final IDMContext<V> dmc = findDmcInPath(update.getElementPath(), fDMCClassType);
-            if (!checkDmc(dmc, update) || !checkService(null, dmc.getServiceFilter(), update)) continue;
-            
-            VMCacheManager.getVMCacheManager().getCache(update.getPresentationContext())
-    			.getModelData((IDMService)getServicesTracker().getService(null, dmc.getServiceFilter()),
-    			dmc, 
-                new DataRequestMonitor<V>(getSession().getExecutor(), null) { 
-                    @Override
-                    protected void handleCompleted() {
-                        /*
-                         * Check that the request was evaluated and data is still
-                         * valid.  The request could fail if the state of the 
-                         * service changed during the request, but the view model
-                         * has not been updated yet.
-                         */ 
-                        if (!getStatus().isOK() || !getData().isValid()) {
-                            assert getStatus().isOK() || 
-                                   getStatus().getCode() != IDsfService.INTERNAL_ERROR || 
-                                   getStatus().getCode() != IDsfService.NOT_SUPPORTED;
-                            handleFailedUpdate(update);
-                            return;
-                        }
-                        
-                        /*
-                         * If columns are configured, call the protected methods to 
-                         * fill in column values.  
-                         */
-                        String[] localColumns = update.getPresentationContext().getColumns();
-                        if (localColumns == null) localColumns = new String[] { null };
-                        
-                        for (int i = 0; i < localColumns.length; i++) {
-                            fillColumnLabel(dmc, getData(), localColumns[i], i, update);
-                        }
-                        update.done();
-                    }
-                },
-                getExecutor());
-        }
-    }
-
-    /**
-     * Fills in label information for given column.  This method is intended to 
-     * be overriden by deriving classes, to supply label information specific
-     * to the node. <br>  
-     * The implementation should fill in the correct value in each array at the 
-     * given index.
-     * @param dmContext Data Model Context object for which the label is generated.
-     * @param dmData Data Model Data object retrieved from the model service.
-     * for the DM Context supplied to the retrieveLabel() call.
-     * @param columnId Name of the column to fill in, null if no columns specified.
-     * @param idx Index to fill in in the label arrays.
-     * @param update Update object to fill information to
-     * 
-     * @see IElementLabelProvider
-     * @see IColumnPresentationFactory
-     */
-    protected void fillColumnLabel(@SuppressWarnings("unused") IDMContext<V> dmContext, @SuppressWarnings("unused") V dmData,
-                                   @SuppressWarnings("unused") String columnId, int idx, ILabelUpdate update) {
-        update.setLabel("", idx); //$NON-NLS-1$
-    }
 
     @Override
     public int getDeltaFlags(Object e) {
@@ -417,7 +340,7 @@ abstract public class AbstractDMVMLayoutNode<V extends IDMData> extends Abstract
      * will only create a delta node for this one element.  
      */
     protected void buildDeltaForDMEvent(final IDMEvent<?> event, final VMDelta parentDelta, final int nodeOffset, final RequestMonitor requestMonitor) {
-        IDMContext<V> dmc = DMContexts.getAncestorOfType(event.getDMContext(), fDMCClassType);
+        IDMContext dmc = DMContexts.getAncestorOfType(event.getDMContext(), fDMCClassType);
         
         if (dmc != null) {
             // Create the VM context based on the DM context from the DM event.
@@ -493,7 +416,7 @@ abstract public class AbstractDMVMLayoutNode<V extends IDMData> extends Abstract
      * @param dmcs Array of DMC objects to build return array on.
      * @return Array of IVMContext objects.
      */
-    protected IVMContext[] dmcs2vmcs(IDMContext<V>[] dmcs) {
+    protected IVMContext[] dmcs2vmcs(IDMContext[] dmcs) {
         IVMContext[] vmContexts = new IVMContext[dmcs.length];
         for (int i = 0; i < dmcs.length; i++) {
             vmContexts[i] = new DMVMContext(dmcs[i]);
@@ -501,7 +424,7 @@ abstract public class AbstractDMVMLayoutNode<V extends IDMData> extends Abstract
         return vmContexts;
     }
     
-    protected void fillUpdateWithVMCs(IChildrenUpdate update, IDMContext<V>[] dmcs) {
+    protected void fillUpdateWithVMCs(IChildrenUpdate update, IDMContext[] dmcs) {
         int startIdx = update.getOffset() != -1 ? update.getOffset() : 0;
         int endIdx = update.getLength() != -1 ? startIdx + update.getLength() : dmcs.length;
         // Ted: added bounds limitation of dmcs.length
@@ -511,7 +434,7 @@ abstract public class AbstractDMVMLayoutNode<V extends IDMData> extends Abstract
         }
     }
     
-    protected IVMContext createVMContext(IDMContext<V> dmc) {
+    protected IVMContext createVMContext(IDMContext dmc) {
         return new DMVMContext(dmc);
     }
 
@@ -528,7 +451,7 @@ abstract public class AbstractDMVMLayoutNode<V extends IDMData> extends Abstract
         T retVal = null;
         for (int i = path.getSegmentCount() - 1; i >= 0; i--) {
             if (path.getSegment(i) instanceof AbstractDMVMLayoutNode.DMVMContext) {
-                IDMContext<?> dmc = ((DMVMContext)path.getSegment(i)).getDMC();
+                IDMContext dmc = ((DMVMContext)path.getSegment(i)).getDMC();
                 if ( dmc.getSessionId().equals(getSession().getId()) ) {
                     retVal = DMContexts.getAncestorOfType(dmc, dmcType);
                     if (retVal != null) break;

plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/dm/DMVMRootLayoutNode.java

@@ -61,14 +61,14 @@ public class DMVMRootLayoutNode extends VMRootLayoutNode
      */
     @Override
     public int getDeltaFlags(Object event) {
-        IDMContext<?> inputDmc = getSelectedDMC();
+        IDMContext inputDmc = getSelectedDMC();
         if (event instanceof IDMEvent && inputDmc != null) {
             boolean potentialMatchFound = false;
             boolean matchFound = false;
             
-            IDMContext<?> eventDmc = ((IDMEvent<?>)event).getDMContext();
+            IDMContext eventDmc = ((IDMEvent<?>)event).getDMContext();
-            for (IDMContext<?> eventDmcAncestor : DMContexts.toList(eventDmc)) {
+            for (IDMContext eventDmcAncestor : DMContexts.toList(eventDmc)) {
-                IDMContext<?> inputDmcAncestor = DMContexts.getAncestorOfType(inputDmc, eventDmcAncestor.getClass()); 
+                IDMContext inputDmcAncestor = DMContexts.getAncestorOfType(inputDmc, eventDmcAncestor.getClass()); 
                 if (inputDmcAncestor != null) {
                     potentialMatchFound = true;
                     if (inputDmcAncestor.equals(eventDmcAncestor)) {
@@ -84,7 +84,7 @@ public class DMVMRootLayoutNode extends VMRootLayoutNode
         return super.getDeltaFlags(event);
     }
 
-    private IDMContext<?> getSelectedDMC() {
+    private IDMContext getSelectedDMC() {
         Object rootObject = getVMProvider().getRootElement();
         if (rootObject instanceof DMVMContext) 
         {

plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/update/VMCache.java

@@ -44,9 +44,9 @@ public abstract class VMCache
 	
 	protected HashMap<Object, Boolean> fHasChildren = new HashMap<Object, Boolean>();
 	
-	protected HashMap<IDMContext<?>, IDMData> fData = new HashMap<IDMContext<?>, IDMData>();
+	protected HashMap<IDMContext, IDMData> fData = new HashMap<IDMContext, IDMData>();
 	
-	protected HashMap<IDMContext<?>, IDMData> fDataArchive = fData;
+	protected HashMap<IDMContext, IDMData> fDataArchive = fData;
 	
 	public HashMap<?,?>[] getCacheData()
 	{
@@ -69,8 +69,8 @@ public abstract class VMCache
 			fHasChildren = (HashMap<Object, Boolean>)oldCacheData[0];
 			fChildrenCounts = (HashMap<Object, Integer>)oldCacheData[1];
 			fChildren = (HashMap<Object, HashMap<Integer,Object>>)oldCacheData[2];
-			fData = (HashMap<IDMContext<?>, IDMData>)oldCacheData[3];
+			fData = (HashMap<IDMContext, IDMData>)oldCacheData[3];
-			fDataArchive = (HashMap<IDMContext<?>, IDMData>)oldCacheData[4];
+			fDataArchive = (HashMap<IDMContext, IDMData>)oldCacheData[4];
 		}
 	}
 	
@@ -78,7 +78,7 @@ public abstract class VMCache
 	{
 		if(archive)
 			fDataArchive = fData;
-		fData = new HashMap<IDMContext<?>, IDMData>();
+		fData = new HashMap<IDMContext, IDMData>();
 		fChildrenCounts.clear();
 		fChildren.clear();
 		fHasChildren.clear();

plugins/org.eclipse.dd.dsf/src/org/eclipse/dd/dsf/datamodel/AbstractDMContext.java

@@ -29,26 +29,24 @@ import org.eclipse.dd.dsf.service.DsfSession;
  * @param <V> Data Model data type that this context is for.
  */
 @Immutable
-abstract public class AbstractDMContext<V extends IDMData> extends PlatformObject 
+abstract public class AbstractDMContext extends PlatformObject 
-    implements IDMContext<V>     
+    implements IDMContext     
 {
     private final String fSessionId;
-    private final String fServiceFilter;
+    private final IDMContext[] fParents;
-    private final IDMContext<?>[] fParents;
 
     /** 
      * Main constructor provides all data needed to implement the IModelContext
      * interface.
      */
-    public AbstractDMContext(String sessionId, String filter, IDMContext<?>[] parents) {
+    public AbstractDMContext(String sessionId, IDMContext[] parents) {
         fSessionId = sessionId;
-        fServiceFilter = filter;
         fParents = parents;
     }
 
     /** Convenience constructor */
-    public AbstractDMContext(IDMService service, IDMContext<?>[] parents) {
+    public AbstractDMContext(IDMService service, IDMContext[] parents) {
-        this(service.getSession().getId(), service.getServiceFilter(), parents);
+        this(service.getSession().getId(), parents);
     }
 
     /** 
@@ -60,13 +58,12 @@ abstract public class AbstractDMContext<V extends IDMData> extends PlatformObjec
     protected boolean baseEquals(Object other) {
         if (other == null) return false;
         if ( !(other.getClass().equals(getClass()))) return false;
-        IDMContext<?> otherCtx = (IDMContext<?>)other;
+        IDMContext otherCtx = (IDMContext)other;
         return getSessionId().equals(otherCtx.getSessionId()) &&
-               getServiceFilter().equals(otherCtx.getServiceFilter()) &&
                areParentsEqual(otherCtx.getParents());
     }
 
-    private boolean areParentsEqual(IDMContext<?>[] otherParents) {
+    private boolean areParentsEqual(IDMContext[] otherParents) {
         if ( !(fParents.length == otherParents.length) ) return false;
         for (int i = 0; i < fParents.length; i++) {
             if (!fParents[i].equals(otherParents[i])) {
@@ -81,20 +78,19 @@ abstract public class AbstractDMContext<V extends IDMData> extends PlatformObjec
         for (Object parent : getParents()) {
             parentsHash += parent.hashCode();
         }
-        return getSessionId().hashCode() + getServiceFilter().hashCode() + parentsHash;
+        return getSessionId().hashCode() + parentsHash;
     }
     
     protected String baseToString() {
         StringBuffer retVal = new StringBuffer(); 
-        for (IDMContext<?> parent : fParents) {
+        for (IDMContext parent : fParents) {
             retVal.append(parent);
         }
         return retVal.toString(); 
     }
     
     public String getSessionId() { return fSessionId; }
-    public String getServiceFilter() { return fServiceFilter; }
+    public IDMContext[] getParents() { return fParents; }
-    public IDMContext<?>[] getParents() { return fParents; }
         
     /**
      * Overrides the standard platform getAdapter to provide session-specific 

plugins/org.eclipse.dd.dsf/src/org/eclipse/dd/dsf/datamodel/AbstractDMEvent.java

@@ -17,7 +17,7 @@ import org.eclipse.dd.dsf.concurrent.Immutable;
  * required DM-Context reference.
  */
 @Immutable
-abstract public class AbstractDMEvent<V extends IDMContext<?>> implements IDMEvent<V> {
+abstract public class AbstractDMEvent<V extends IDMContext> implements IDMEvent<V> {
 
     private final V fModelContext;
     public AbstractDMEvent(V context) {

plugins/org.eclipse.dd.dsf/src/org/eclipse/dd/dsf/datamodel/DMContexts.java

@@ -59,16 +59,16 @@ public class DMContexts {
      * @return true if a match is found.
      */
     @ThreadSafe
-    public static boolean isAncestorOf(IDMContext<?> dmc, IDMContext<?> potentialAncestor) {
+    public static boolean isAncestorOf(IDMContext dmc, IDMContext potentialAncestor) {
         // Check the direct parents for a match.
-        for (IDMContext<?> parentDmc : dmc.getParents()) {
+        for (IDMContext parentDmc : dmc.getParents()) {
             if (potentialAncestor.equals(parentDmc)) {
                 return true;
             }
         }
 
         // Recursively check the parents' parents for a match.
-        for (IDMContext<?> parentDmc : dmc.getParents()) {
+        for (IDMContext parentDmc : dmc.getParents()) {
             if (isAncestorOf(parentDmc, potentialAncestor)) {
                 return true;
             }
@@ -83,15 +83,15 @@ public class DMContexts {
      * into a list.
      */
     @ThreadSafe
-    public static List<IDMContext<?>> toList(IDMContext<?> dmc) {
+    public static List<IDMContext> toList(IDMContext dmc) {
         /*
          * This method is implemented recursively, which is not necessarily
          * the most efficient way to do this.
          */
-        List<IDMContext<?>> list = new ArrayList<IDMContext<?>>();
+        List<IDMContext> list = new ArrayList<IDMContext>();
         list.add(dmc);
 
-        for (IDMContext<?> parentDmc : dmc.getParents()) {
+        for (IDMContext parentDmc : dmc.getParents()) {
             list.addAll(toList(parentDmc));
         }
         return list;

plugins/org.eclipse.dd.dsf/src/org/eclipse/dd/dsf/datamodel/IDMContext.java

@@ -44,7 +44,7 @@ import org.eclipse.dd.dsf.concurrent.Immutable;
  * @see IDMData 
  */
 @Immutable
-public interface IDMContext<V extends IDMData> extends IAdaptable 
+public interface IDMContext extends IAdaptable 
 {
     /** 
      * Each model context object needs to track the session from which it 
@@ -55,17 +55,6 @@ public interface IDMContext<V extends IDMData> extends IAdaptable
      */
     public String getSessionId();
     
-    /**
-     * Returns the service filter object which can be used to uniquely identify
-     * a service.  For most services, it's sufficient to know the service class
-     * and the session-id to find the service, but some services may have 
-     * multiple instances running in the same session.  For those services, this
-     * filter string can be used to find the correct service instance.
-     * @see org.osgi.framework.BundleContext#getServiceReferences
-     * @return
-     */
-    public String getServiceFilter();
-    
     /**
      * Returns the parent context of this context.  ModelContext objects can be 
      * chained this way to allow methods that require context from multiple 
@@ -73,5 +62,5 @@ public interface IDMContext<V extends IDMData> extends IAdaptable
      * the client.
      * @return parent context of this context.
      */
-    public IDMContext<?>[] getParents();
+    public IDMContext[] getParents();
 }

plugins/org.eclipse.dd.dsf/src/org/eclipse/dd/dsf/datamodel/IDMData.java

@@ -10,23 +10,13 @@
  *******************************************************************************/
 package org.eclipse.dd.dsf.datamodel;
 
-import org.eclipse.dd.dsf.concurrent.ConfinedToDsfExecutor;
+import org.eclipse.dd.dsf.concurrent.Immutable;
 
 /**
- * Data object containing information regarding a model context.  Unlike the 
+ * Marker interface for data corresponding to IDMContext, retrieved from a 
- * DM Context object, this object does have to be accessed on the dispatch thread, 
+ * service.  These data objects are meant to be processed by clients on 
- * unless other-wise noted.  And it does not need to be immutable or free of 
+ * different threads, therefore they should be immutable.
- * references to the service.  In fact, to avoid unnecessary duplication of data
- * it is most practical for the DM Data object to simply retrieve data directly
- * from the service internals (caches, queues, etc).
  */
-@ConfinedToDsfExecutor("")
+@Immutable
 public interface IDMData {
-    
-    /** 
-     * Returns true if the data represented by this object is still valid.  
-     * Data may become invalid if, for example the cache object backing this
-     * data was cleared. 
-     */
-    public boolean isValid();
 }

plugins/org.eclipse.dd.dsf/src/org/eclipse/dd/dsf/datamodel/IDMEvent.java

@@ -16,6 +16,6 @@ package org.eclipse.dd.dsf.datamodel;
  * this base class only identifies the DM Context that is affected.
  * @param <V> Data Model context type that is affected by this event.
  */
-public interface IDMEvent <V extends IDMContext<?>> {
+public interface IDMEvent <V extends IDMContext> {
     V getDMContext();
 }

plugins/org.eclipse.dd.dsf/src/org/eclipse/dd/dsf/datamodel/IDMService.java

@@ -20,13 +20,13 @@ import org.eclipse.dd.dsf.service.IDsfService;
  * and has a method which allows clients to retrieve the DM Context that 
  * represents the service data. 
  */
-public interface IDMService extends IDsfService, IDMData {
+public interface IDMService extends IDsfService {
     /**
      * Returns the context representing the service in the data model.  It is 
      * usually used in events to indicate that lists of contexts in this 
      * service are changed. 
      */
-    IDMContext<?> getServiceContext();
+    IDMContext getServiceContext();
 
     /**
     /**
@@ -38,5 +38,5 @@ public interface IDMService extends IDsfService, IDMData {
      * @param dmc Data Model Context for the data model data object to be retrieved.
      * @param rm Request completion monitor to be filled in with the Data Model Data.
      */
-    <V extends IDMData> void getModelData(IDMContext<V> dmc, DataRequestMonitor<V> rm);
+    void getModelData(IDMContext dmc, DataRequestMonitor<?> rm);
 }

plugins/org.eclipse.dd.dsf/src/org/eclipse/dd/dsf/datamodel/ServiceDMContext.java

@@ -16,11 +16,11 @@ package org.eclipse.dd.dsf.datamodel;
  * {@link IDMService#getServiceContext()} methods.  The service DM Context
  * should be the parent of all contexts originating from the given service.
  */
-public class ServiceDMContext<V extends IDMService> extends AbstractDMContext<V> {
+public class ServiceDMContext extends AbstractDMContext {
     String fServiceDMID;
     
     public ServiceDMContext(IDMService service, String serviceDMID) {
-        super(service, new IDMContext<?>[0]);
+        super(service, new IDMContext[0]);
         fServiceDMID = serviceDMID; 
     }
     
@@ -29,7 +29,7 @@ public class ServiceDMContext<V extends IDMService> extends AbstractDMContext<V>
 
     @Override
     public boolean equals(Object obj) { 
-        return obj instanceof ServiceDMContext<?> && fServiceDMID.equals(((ServiceDMContext<?>)obj).fServiceDMID); 
+        return obj instanceof ServiceDMContext && fServiceDMID.equals(((ServiceDMContext)obj).fServiceDMID); 
     }
     
     @Override