Bug 425002 QObjects cannot be found within namespaces

This changes the Qt PDOM so that QObject's are stored using their fully
qualified name (including leading ::).  IQObject's API has been changed
to return the fully qualified name.  Leading :: is stripped from the
IQObject name so there is no change from the previous implementation for
names that are not inside a namspace.

This includes a new test case to check this fix.

Change-Id: I1786151463e9029cdf1f2c213466adc8c3aa3618
Signed-off-by: Andrew Eidsness <eclipse@jfront.com>
Reviewed-on: https://git.eclipse.org/r/20328
Tested-by: Hudson CI
Reviewed-by: Doug Schaefer <dschaefer@qnx.com>
IP-Clean: Doug Schaefer <dschaefer@qnx.com>

qt/org.eclipse.cdt.qt.core/src/org/eclipse/cdt/internal/qt/core/ASTUtil.java

@@ -61,6 +61,38 @@ public class ASTUtil {
 		return cProject.getProject();
 	}
 
+	/**
+	 * Return the fully qualified name of the binding for the given name.  Returns null
+	 * if the name has no binding.  Tries to resolve the binding if needed.
+	 */
+	public static String getFullyQualifiedName(IASTName name) {
+		return getFullyQualifiedName(name.resolveBinding());
+	}
+
+	/**
+	 * Return the fully qualified name of the given binding.  Returns null if there
+	 * is no binding.
+	 */
+	public static String getFullyQualifiedName(IBinding binding) {
+		if (binding == null)
+			return null;
+
+		String ownerName = getFullyQualifiedName(binding.getOwner());
+		return (ownerName == null ? "" : ownerName) + "::" + binding.getName();
+	}
+
+	/**
+	 * Create and return a string representation of the fully qualified name in the
+	 * input array's elements.
+	 */
+	public static String getFullyQualifiedName(String[] qualName) {
+		String fullyQualifiedName = "";
+		for(int i = 0; i < qualName.length; ++i) {
+			fullyQualifiedName += "::" + qualName[i];
+		}
+		return fullyQualifiedName;
+	}
+
 	// NOTE: This expression allows embedded line terminators (?s) for cases where the code looks like:
 	// QObject::connect( &a, SIGNAL(
 	//					sig1(

qt/org.eclipse.cdt.qt.core/src/org/eclipse/cdt/internal/qt/core/QtMethodReference.java

@@ -160,7 +160,7 @@ public class QtMethodReference extends ASTNameReference {
 	}
 
 	@Override
-	public char[] toCharArray() {
+	public char[] getSimpleID() {
 		return expansionParam.toCharArray();
 	}
 

qt/org.eclipse.cdt.qt.core/src/org/eclipse/cdt/internal/qt/core/index/QObject.java

@@ -11,6 +11,7 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
 import java.util.Map;
+import java.util.regex.Pattern;
 
 import org.eclipse.cdt.core.dom.ast.IBinding;
 import org.eclipse.cdt.internal.qt.core.pdom.QtPDOMProperty;
@@ -35,8 +36,15 @@ public class QObject implements IQObject {
 	private final List<IQEnum> enums;
 	private final Map<String, String> classInfos;
 
+	/**
+	 * QObjects are stored in the QtLinkage using their fully qualified name.  The API
+	 * for IQObject does not expect the leading ::, so they are stripped when the
+	 * object is read from the PDOM.
+	 */
+	private static Pattern StripLeadingQual_Regex = Pattern.compile("^::(.*)$");
+
 	public QObject(QtIndexImpl qtIndex, CDTIndex cdtIndex, QtPDOMQObject pdomQObject) throws CoreException {
-		this.name = pdomQObject.getName();
+		this.name = StripLeadingQual_Regex.matcher(pdomQObject.getName()).replaceAll("$1");
 		this.pdomQObject = pdomQObject;
 
 		List<IQMethod> baseSlots = new ArrayList<IQMethod>();

qt/org.eclipse.cdt.qt.core/src/org/eclipse/cdt/internal/qt/core/index/QtIndexImpl.java

@@ -12,6 +12,7 @@ import org.eclipse.cdt.core.dom.ast.IBinding;
 import org.eclipse.cdt.core.index.IIndex;
 import org.eclipse.cdt.core.index.IIndexBinding;
 import org.eclipse.cdt.core.index.IndexFilter;
+import org.eclipse.cdt.internal.qt.core.ASTUtil;
 import org.eclipse.cdt.internal.qt.core.pdom.AbstractQtPDOMClass;
 import org.eclipse.cdt.internal.qt.core.pdom.QtPDOMQObject;
 import org.eclipse.cdt.qt.core.index.IQGadget;
@@ -51,12 +52,11 @@ public class QtIndexImpl extends QtIndex {
 
 	private class QObjectImplAccessor implements CDTIndex.Accessor<IQObject> {
 
-		private final char[][] name;
+		private final char[] name;
 
 		public QObjectImplAccessor(String[] qualName) {
-			name = new char[qualName.length][];
-			for(int i = 0; i < name.length; ++i)
-				name[i] = qualName[i].toCharArray();
+			// QObjects are stored in the Qt linkage using their fully qualified name.
+			name = ASTUtil.getFullyQualifiedName(qualName).toCharArray();
 		}
 
 		@Override

qt/org.eclipse.cdt.qt.core/src/org/eclipse/cdt/internal/qt/core/pdom/ASTDelegatedName.java

@@ -149,18 +149,18 @@ public abstract class ASTDelegatedName implements IASTName {
 	}
 
 	@Override
-	public char[] toCharArray() {
-		return delegate.toCharArray();
+	public char[] getSimpleID() {
+		return delegate.getSimpleID();
 	}
 
 	@Override
-	public char[] getSimpleID() {
-		return toCharArray();
+	public char[] toCharArray() {
+		return getSimpleID();
 	}
 
 	@Override
 	public char[] getLookupKey() {
-		return toCharArray();
+		return getSimpleID();
 	}
 
 	@Override

qt/org.eclipse.cdt.qt.core/src/org/eclipse/cdt/internal/qt/core/pdom/QObjectName.java

@@ -14,6 +14,7 @@ import java.util.Map;
 
 import org.eclipse.cdt.core.dom.ast.IASTName;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTCompositeTypeSpecifier;
+import org.eclipse.cdt.internal.qt.core.ASTUtil;
 import org.eclipse.core.runtime.CoreException;
 
 /**
@@ -22,11 +23,19 @@ import org.eclipse.core.runtime.CoreException;
  */
 public class QObjectName extends AbstractQClassName {
 
+	private final char[] fullyQualifiedName;
 	private final List<QtPropertyName> properties = new ArrayList<QtPropertyName>();
 	private final Map<String, String> classInfos = new LinkedHashMap<String, String>();
 
 	public QObjectName(ICPPASTCompositeTypeSpecifier spec) {
 		super(spec);
+		fullyQualifiedName = ASTUtil.getFullyQualifiedName(spec.getName()).toCharArray();
+	}
+
+	@Override
+	public char[] getSimpleID() {
+		// The Qt linkage uses the full qualified name when storing QObjects into the index.
+		return fullyQualifiedName;
 	}
 
 	public List<QtPropertyName> getProperties() {

qt/org.eclipse.cdt.qt.core/src/org/eclipse/cdt/qt/core/index/IQObject.java

@@ -65,7 +65,7 @@ public interface IQObject extends IQElement {
 	}
 
 	/**
-	 * Returns the name of the class.
+	 * Returns the fully qualified name of the class.
 	 */
 	public String getName();
 

qt/org.eclipse.cdt.qt.tests/src/org/eclipse/cdt/qt/tests/QObjectTests.java

@@ -452,6 +452,37 @@ public class QObjectTests extends BaseQtTestCase {
 		assertFalse(i.hasNext());
 	}
 
+	// #include "junit-QObject.hh"
+    // namespace N {
+	//     class Q : public QObject
+    //     {
+    //     Q_OBJECT
+	//     Q_SIGNAL void aSignal();
+    //     };
+	// }
+	public void testQObjectInNamespace() throws Exception {
+		loadComment("namespace_qobj.hh");
+
+		QtIndex qtIndex = QtIndex.getIndex(fProject);
+		assertNotNull(qtIndex);
+
+		IQObject qobj = qtIndex.findQObject(new String[]{ "N", "Q" });
+		if (!isIndexOk("N::Q", qobj))
+			return;
+		assertNotNull(qobj);
+
+		IQObject.IMembers<IQMethod> signals = qobj.getSignals();
+		assertNotNull(signals);
+
+		Collection<IQMethod> locals = signals.locals();
+		assertNotNull(locals);
+
+		Iterator<IQMethod> i = locals.iterator();
+		assertTrue(i.hasNext());
+		assert_checkQMethod(i.next(), qobj, "aSignal", IQMethod.Kind.Signal, null);
+		assertFalse(i.hasNext());
+	}
+
 	private static void assert_checkQMethod(IQMethod method, IQObject expectedOwner, String expectedName, IQMethod.Kind expectedKind, Long expectedRevision) throws Exception {
 		assertEquals(expectedKind, method.getKind());
 		assertEquals(expectedName, method.getName());