project/com.nokia.carbide.cpp.epoc.engine/src/com/nokia/carbide/internal/cpp/epoc/engine/model/UnmodifiableKeyMap.java
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/project/com.nokia.carbide.cpp.epoc.engine/src/com/nokia/carbide/internal/cpp/epoc/engine/model/UnmodifiableKeyMap.java Fri Apr 03 23:33:03 2009 +0100
@@ -0,0 +1,121 @@
+/*
+* Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:
+*
+*/
+
+package com.nokia.carbide.internal.cpp.epoc.engine.model;
+
+import java.util.*;
+
+/**
+ * This is a map whose keys are unmodifiable.
+ *
+ */
+public class UnmodifiableKeyMap<K, V> implements Map<K, V> {
+
+ private static final String MSG = "The keys in this map may not be modified."; //$NON-NLS-1$
+ private Map<K, V> map;
+
+ public UnmodifiableKeyMap(Map<K, V> realMap) {
+ this.map = realMap;
+ }
+ /* (non-Javadoc)
+ * @see java.util.Map#clear()
+ */
+ public void clear() {
+ throw new UnsupportedOperationException(MSG);
+ }
+
+ /* (non-Javadoc)
+ * @see java.util.Map#containsKey(java.lang.Object)
+ */
+ public boolean containsKey(Object key) {
+ return map.containsKey(key);
+ }
+
+ /* (non-Javadoc)
+ * @see java.util.Map#containsValue(java.lang.Object)
+ */
+ public boolean containsValue(Object value) {
+ return map.containsValue(value);
+ }
+
+ /* (non-Javadoc)
+ * @see java.util.Map#entrySet()
+ */
+ public Set<java.util.Map.Entry<K, V>> entrySet() {
+ return Collections.unmodifiableSet(map.entrySet());
+ }
+
+ /* (non-Javadoc)
+ * @see java.util.Map#get(java.lang.Object)
+ */
+ public V get(Object key) {
+ return map.get(key);
+ }
+
+ /* (non-Javadoc)
+ * @see java.util.Map#isEmpty()
+ */
+ public boolean isEmpty() {
+ return map.isEmpty();
+ }
+
+ /* (non-Javadoc)
+ * @see java.util.Map#keySet()
+ */
+ public Set<K> keySet() {
+ return Collections.unmodifiableSet(map.keySet());
+ }
+
+ /* (non-Javadoc)
+ * @see java.util.Map#put(java.lang.Object, java.lang.Object)
+ */
+ public V put(K key, V value) {
+ if (!map.containsKey(key))
+ throw new UnsupportedOperationException(MSG);
+ return map.put(key, value);
+ }
+
+ /* (non-Javadoc)
+ * @see java.util.Map#putAll(java.util.Map)
+ */
+ public void putAll(Map<? extends K, ? extends V> t) {
+ for (Map.Entry<? extends K, ? extends V> entry : t.entrySet()) {
+ put(entry.getKey(), entry.getValue());
+ }
+ }
+
+ /* (non-Javadoc)
+ * @see java.util.Map#remove(java.lang.Object)
+ */
+ public V remove(Object key) {
+ throw new UnsupportedOperationException(MSG);
+ }
+
+ /* (non-Javadoc)
+ * @see java.util.Map#size()
+ */
+ public int size() {
+ return map.size();
+ }
+
+ /* (non-Javadoc)
+ * @see java.util.Map#values()
+ */
+ public Collection<V> values() {
+ return map.values();
+ }
+}