Importing the XDebugProxy code in the HEAD. The repo was tagged with T_BEFORE_XDEBUGP...

[phpeclipse.git] / net.sourceforge.phpeclipse.xdebug.core / src / net / sourceforge / phpeclipse / xdebug / core / ListenerMap.java

diff --git a/net.sourceforge.phpeclipse.xdebug.core/src/net/sourceforge/phpeclipse/xdebug/core/ListenerMap.java b/net.sourceforge.phpeclipse.xdebug.core/src/net/sourceforge/phpeclipse/xdebug/core/ListenerMap.java
new file mode 100644 (file)
index 0000000..9b51572
--- /dev/null
+++ b/net.sourceforge.phpeclipse.xdebug.core/src/net/sourceforge/phpeclipse/xdebug/core/ListenerMap.java
@@ -0,0 +1,125 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2005 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 net.sourceforge.phpeclipse.xdebug.core;
+
+import java.util.HashMap;
+
+
+/**
+ * Local version of org.eclipse.jface.util.ListenerList (modified)s
+ */
+public class ListenerMap {
+       /**
+        * The current number of listeners.
+        * Maintains invariant: 0 <= fSize <= listeners.length.
+        */
+       private int fSize;
+
+       /**
+        * The map of listeners.  Initially <code>null</code> but initialized
+        * to an array of size capacity the first time a listener is added.
+        * Maintains invariant: listeners != null if and only if fSize != 0
+        */
+       private HashMap fListeners = null;
+//     private HashMap<String,Object> fListeners = null;
+
+       /**
+        * Creates a listener map with the given initial capacity.
+        *
+        * @param capacity the number of listeners which this list can initially accept 
+        *    without growing its internal representation; must be at least 1
+        */
+       public ListenerMap(int capacity) {
+               if (capacity < 1) {
+                       throw new IllegalArgumentException();
+               }
+               fListeners = new HashMap(capacity);
+               fSize = 0;
+       }
+
+       /**
+        * Adds a listener to the Map.
+        * Overwrites an existing listener with the same IDE_Key.
+        *
+        * @param listener a listener
+        * @param ideKey IDE-key of the listener
+        */
+       public synchronized void add(Object listener,String ideKey) {
+               if (listener == null) {
+                       throw new IllegalArgumentException();
+               }
+               // check for duplicates using identity
+               if (fListeners.get(ideKey) != null)
+                       fSize++;
+               fListeners.put(ideKey,listener);
+       }
+
+       /**
+        * Returns a map containing all the registered listeners.
+        * The resulting map is unaffected by subsequent adds or removes.
+        * If there are no listeners registered, the result is an empty map.
+        * Use this method when notifying listeners, so that any modifications
+        * to the listener list during the notification will have no effect on the
+        * notification itself.
+        */
+       public synchronized HashMap getListeners() {
+               if (fSize == 0) {
+                       return null;
+               }
+               HashMap result = new HashMap(fListeners);
+               return result;
+       }
+       
+       /**
+        * Returns the listener associated with the ideKey.
+        * If there is no listener registered, the result is null.
+        * Use this method when notifying listeners, so that any modifications
+        * to the listener list during the notification will have no effect on the
+        * notification itself.
+        */
+       public synchronized Object getListener(String ideKey) {
+               return fListeners.get(ideKey);
+       }
+
+       /**
+        * Removes a listener from the list.
+        * Has no effect if an identical listener was not already registered.
+        *
+        * @param listener a listener
+        */
+       public synchronized void remove(Object listener,String ideKey) {
+               if (listener == null) {
+                       throw new IllegalArgumentException();
+               }
+               
+               if (fListeners.get(ideKey) == listener) {
+                       fListeners.remove(ideKey);
+                       fSize--;
+               }
+       }
+
+       /**
+        * Removes all the listeners from the list.
+        */
+       public synchronized void removeAll() {
+               fListeners.clear();
+               fSize = 0;
+       }
+
+       /**
+        * Returns the number of registered listeners
+        *
+        * @return the number of registered listeners
+        */
+       public int size() {
+               return fSize;
+       }
+}
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