1 files changed, 88 insertions, 0 deletions
diff --git a/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/contexts/provisional/AbstractDebugContextProvider.java b/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/contexts/provisional/AbstractDebugContextProvider.java
new file mode 100644
index 000000000..5370af0ad
--- /dev/null
+++ b/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/contexts/provisional/AbstractDebugContextProvider.java
@@ -0,0 +1,88 @@
+/*******************************************************************************
+ * Copyright (c) 2006 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.debug.internal.ui.contexts.provisional;
+
+import org.eclipse.core.runtime.ISafeRunnable;
+import org.eclipse.core.runtime.ListenerList;
+import org.eclipse.core.runtime.SafeRunner;
+import org.eclipse.debug.internal.ui.DebugUIPlugin;
+import org.eclipse.ui.IWorkbenchPart;
+
+/**
+ * Abstract implementation of a debug context provider.
+ * <p>
+ * Clients implementing context providers should subclass this class.
+ * </p>
+ * @since 3.3
+ */
+public abstract class AbstractDebugContextProvider implements IDebugContextProvider {
+	
+	/**
+	 * Event listeners
+	 */
+	private ListenerList fListeners = new ListenerList();
+	
+	/**
+	 * Part or <code>null</code>
+	 */
+	private IWorkbenchPart fPart;
+	
+	/**
+	 * Constructs a context provider for the specified part, possibly <code>null</code>.
+	 * 
+	 * @param part workbench part or <code>null</code>
+	 */
+	public AbstractDebugContextProvider(IWorkbenchPart part) {
+		fPart = part;
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.debug.internal.ui.contexts.provisional.IDebugContextProvider#addDebugContextEventListener(org.eclipse.debug.internal.ui.contexts.provisional.IDebugContextEventListener)
+	 */
+	public void addDebugContextEventListener(IDebugContextEventListener listener) {
+		fListeners.add(listener);
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.debug.internal.ui.contexts.provisional.IDebugContextProvider#getPart()
+	 */
+	public IWorkbenchPart getPart() {
+		return fPart;
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.debug.internal.ui.contexts.provisional.IDebugContextProvider#removeDebugContextEventListener(org.eclipse.debug.internal.ui.contexts.provisional.IDebugContextEventListener)
+	 */
+	public void removeDebugContextEventListener(IDebugContextEventListener listener) {
+		fListeners.remove(listener);
+	}
+
+	/**
+	 * Fires the given context event to all listeners.
+	 * 
+	 * @param event debug context event
+	 */
+	protected void fire(final DebugContextEvent event) {
+		Object[] listeners = fListeners.getListeners();
+		for (int i = 0; i < listeners.length; i++) {
+			final IDebugContextEventListener listener = (IDebugContextEventListener) listeners[i];
+            SafeRunner.run(new ISafeRunnable() {
+				public void run() throws Exception {
+					listener.contextEvent(event);
+				}
+				public void handleException(Throwable exception) {
+					DebugUIPlugin.log(exception);
+				}
+			});
+			
+		}
+	}
+}