From 6c0b64d3dd8053d9903c316152ec339f9a5e37b6 Mon Sep 17 00:00:00 2001
From: David McKnight <dmcknigh@ca.ibm.com>
Date: Thu, 25 Oct 2007 21:04:21 +0000
Subject: [PATCH] [207100] adding
 ISystemRegistry.isRegisteredSystemRemoteChangeListener

---
 .../org/eclipse/rse/core/model/ISystemRegistry.java    |  7 +++++++
 .../core/model/SystemRemoteChangeEventManager.java     |  9 +++++++++
 .../eclipse/rse/ui/internal/model/SystemRegistry.java  | 10 ++++++++++
 3 files changed, 26 insertions(+)

diff --git a/rse/plugins/org.eclipse.rse.core/src/org/eclipse/rse/core/model/ISystemRegistry.java b/rse/plugins/org.eclipse.rse.core/src/org/eclipse/rse/core/model/ISystemRegistry.java
index 697dfa06e4d..d4a51070009 100644
--- a/rse/plugins/org.eclipse.rse.core/src/org/eclipse/rse/core/model/ISystemRegistry.java
+++ b/rse/plugins/org.eclipse.rse.core/src/org/eclipse/rse/core/model/ISystemRegistry.java
@@ -19,6 +19,7 @@
  * Martin Oberhuber (Wind River) - [189123] Prepare ISystemRegistry for move into non-UI
  * Martin Oberhuber (Wind River) - [175680] Deprecate obsolete ISystemRegistry methods
  * Martin Oberhuber (Wind River) - [190271] Move ISystemViewInputProvider to Core
+ * David McKnight   (IBM)        - [207100] adding ISystemRegistry.isRegisteredSystemRemoteChangeListener
  ********************************************************************************/
 
 package org.eclipse.rse.core.model;
@@ -729,6 +730,12 @@ public interface ISystemRegistry extends ISchedulingRule, IAdaptable, ISystemVie
 	 */
 	public void removeSystemRemoteChangeListener(ISystemRemoteChangeListener l);
 
+
+	/**
+	 * Query if the ISystemRemoteChangeListener is already listening for SystemRemoteChange events
+	 */
+	public boolean isRegisteredSystemRemoteChangeListener(ISystemRemoteChangeListener l);
+
 	/**
 	 * Notify all listeners of a change to a remote resource such as a file.
 	 * You would not normally call this as the methods in this class call it when appropriate.
diff --git a/rse/plugins/org.eclipse.rse.core/src/org/eclipse/rse/internal/core/model/SystemRemoteChangeEventManager.java b/rse/plugins/org.eclipse.rse.core/src/org/eclipse/rse/internal/core/model/SystemRemoteChangeEventManager.java
index c78cafa7788..e94f23a44ec 100644
--- a/rse/plugins/org.eclipse.rse.core/src/org/eclipse/rse/internal/core/model/SystemRemoteChangeEventManager.java
+++ b/rse/plugins/org.eclipse.rse.core/src/org/eclipse/rse/internal/core/model/SystemRemoteChangeEventManager.java
@@ -12,6 +12,7 @@
  * 
  * Contributors:
  * Martin Oberhuber (Wind River) - [168975] Move RSE Events API to Core
+ * David McKnight   (IBM)        - [207100] adding SystemRemoteChangeEventManager.isRegisteredSystemRemoteChangeListener
  ********************************************************************************/
 
 package org.eclipse.rse.internal.core.model;
@@ -33,6 +34,14 @@ public class SystemRemoteChangeEventManager
     public SystemRemoteChangeEventManager()
     {
     }
+    
+    /**
+     * Query if the ISystemRemoteChangeListener is already listening for SystemRemoteChange events
+     */
+    public boolean isRegisteredSystemRemoteChangeListener(ISystemRemoteChangeListener l)
+    {
+    	return listeners.contains(l);
+    }
 
     /**
      * Add a listener to list of listeners.
diff --git a/rse/plugins/org.eclipse.rse.ui/model/org/eclipse/rse/ui/internal/model/SystemRegistry.java b/rse/plugins/org.eclipse.rse.ui/model/org/eclipse/rse/ui/internal/model/SystemRegistry.java
index 91bc731752f..8cff6971280 100644
--- a/rse/plugins/org.eclipse.rse.ui/model/org/eclipse/rse/ui/internal/model/SystemRegistry.java
+++ b/rse/plugins/org.eclipse.rse.ui/model/org/eclipse/rse/ui/internal/model/SystemRegistry.java
@@ -35,6 +35,7 @@
  * David McKnight   (IBM)        - [165674] Sort subsystem configurations to be in deterministic order
  * Martin Oberhuber (Wind River) - [165674] Sort subsystem configurations by priority then Id
  * Martin Oberhuber (Wind River) - [194898] Avoid NPE when doing EVENT_REFRESH_REMOTE on a subsys without filters
+ * David McKnight   (IBM)        - [207100] adding ISystemRegistry.isRegisteredSystemRemoteChangeListener
  ********************************************************************************/
 
 package org.eclipse.rse.ui.internal.model;
@@ -2685,6 +2686,15 @@ public class SystemRegistry implements ISystemRegistry
 		remoteListManager.removeSystemRemoteChangeListener(l);
 		remoteListCount--;
 	}
+	
+	/**
+	 * Query if the ISystemRemoteChangeListener is already listening for SystemRemoteChange events
+	 */
+	public boolean isRegisteredSystemRemoteChangeListener(ISystemRemoteChangeListener l)
+	{
+		return remoteListManager.isRegisteredSystemRemoteChangeListener(l);
+	}
+	
 	/**
 	 * Notify all listeners of a change to a remote resource such as a file.
 	 * You would not normally call this as the methods in this class call it when appropriate.