/*******************************************************************************
* Copyright (c) 2008, 2015 Matthew Hall 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:
* Matthew Hall - bug 237718
* Stefan Xenos <sxenos@gmail.com> - Bug 335792
******************************************************************************/
package org.eclipse.core.internal.databinding.observable;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import java.util.Set;
import org.eclipse.core.databinding.observable.map.DecoratingObservableMap;
import org.eclipse.core.databinding.observable.map.IObservableMap;
/**
* IObservableMap implementation that prevents modification by consumers. Events
* in the originating wrapped map are propagated and thrown from this instance
* when appropriate. All mutators throw an UnsupportedOperationException.
*
* @param <K>
* the type of the keys in this map
* @param <V>
* the type of the values in this map
*
* @since 1.0
*/
public class UnmodifiableObservableMap<K, V> extends DecoratingObservableMap<K, V> {
Map<K, V> unmodifiableMap;
/**
* @param decorated
*/
public UnmodifiableObservableMap(IObservableMap<K, V> decorated) {
super(decorated, false);
this.unmodifiableMap = Collections.unmodifiableMap(decorated);
}
@Override
public void clear() {
throw new UnsupportedOperationException();
}
@Override
public Set<Entry<K, V>> entrySet() {
getterCalled();
return unmodifiableMap.entrySet();
}
@Override
public Set<K> keySet() {
getterCalled();
return unmodifiableMap.keySet();
}
@Override
public V put(K key, V value) {
throw new UnsupportedOperationException();
}
@Override
public void putAll(Map<? extends K, ? extends V> m) {
throw new UnsupportedOperationException();
}
@Override
public V remove(Object key) {
throw new UnsupportedOperationException();
}
@Override
public Collection<V> values() {
getterCalled();
return unmodifiableMap.values();
}
@Override
public synchronized void dispose() {
unmodifiableMap = null;
super.dispose();
}
}