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/*
* Copyright (c) 2004 - 2011 Eike Stepper (Berlin, Germany) 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:
* Eike Stepper - initial API and implementation
*/
package org.eclipse.net4j.util.container.delegate;
import org.eclipse.net4j.util.collection.MapEntry;
import org.eclipse.net4j.util.container.ContainerEvent;
import org.eclipse.net4j.util.container.IContainerDelta;
import org.eclipse.net4j.util.event.IListener;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
/**
* A default implementation of a {@link IContainerMap container map}.
*
* @author Eike Stepper
* @apiviz.exclude
*/
public class ContainerMap<K, V> extends AbstractDelegator<Map.Entry<K, V>> implements IContainerMap<K, V>
{
private Map<K, V> delegate;
public ContainerMap(Map<K, V> delegate)
{
this.delegate = delegate;
}
public Map<K, V> getDelegate()
{
return delegate;
}
/**
* @category WRITE
*/
public void clear()
{
if (!isEmpty())
{
ContainerEvent<Map.Entry<K, V>> event = createEvent(getDelegate().entrySet(), IContainerDelta.Kind.REMOVED);
getDelegate().clear();
IListener[] listeners = getListeners();
if (listeners != null)
{
fireEvent(event, listeners);
}
}
}
/**
* @category WRITE
*/
public V put(K key, V value)
{
ContainerEvent<Map.Entry<K, V>> event = new ContainerEvent<Map.Entry<K, V>>(this);
V removed = getDelegate().put(key, value);
if (removed != null)
{
event.addDelta(new ContainerMapEntry<K, V>(key, removed), IContainerDelta.Kind.REMOVED);
}
event.addDelta(new ContainerMapEntry<K, V>(key, value), IContainerDelta.Kind.ADDED);
IListener[] listeners = getListeners();
if (listeners != null)
{
fireEvent(event, listeners);
}
return removed;
}
/**
* @category WRITE
*/
public void putAll(Map<? extends K, ? extends V> t)
{
ContainerEvent<Map.Entry<K, V>> event = new ContainerEvent<Map.Entry<K, V>>(this);
Iterator<? extends Entry<? extends K, ? extends V>> i = t.entrySet().iterator();
while (i.hasNext())
{
Entry<? extends K, ? extends V> entry = i.next();
K key = entry.getKey();
V value = entry.getValue();
V removed = getDelegate().put(key, value);
if (removed != null)
{
event.addDelta(new ContainerMapEntry<K, V>(key, removed), IContainerDelta.Kind.REMOVED);
}
event.addDelta(new ContainerMapEntry<K, V>(key, value), IContainerDelta.Kind.ADDED);
}
dispatchEvent(event);
}
/**
* @category WRITE
*/
public V remove(Object key)
{
V removed = getDelegate().remove(key);
if (removed != null)
{
fireRemovedEvent(new ContainerMapEntry<Object, V>(key, removed));
}
return removed;
}
/**
* @category READ
*/
public boolean containsKey(Object key)
{
return getDelegate().containsKey(key);
}
/**
* @category READ
*/
public boolean containsValue(Object value)
{
return getDelegate().containsValue(value);
}
/**
* @category READ
*/
public V get(Object key)
{
return getDelegate().get(key);
}
/**
* @category READ
*/
public int size()
{
return getDelegate().size();
}
/**
* @category READ
*/
@SuppressWarnings("unchecked")
public Map.Entry<K, V>[] getElements()
{
return (Entry<K, V>[])getDelegate().entrySet().toArray();
}
/**
* @category READ
*/
public boolean isEmpty()
{
return getDelegate().isEmpty();
}
/**
* @category READ
*/
public Set<Map.Entry<K, V>> entrySet()
{
return new ContainerSet<Map.Entry<K, V>>(getDelegate().entrySet());
}
/**
* @category READ
*/
public Set<K> keySet()
{
return new ContainerSet<K>(getDelegate().keySet());
}
/**
* @category READ
*/
public Collection<V> values()
{
return new ContainerCollection<V>(getDelegate().values());
}
/**
* @author Eike Stepper
*/
private static final class ContainerMapEntry<K, V> extends MapEntry<K, V>
{
public ContainerMapEntry(K key, V value)
{
super(key, value);
}
@Override
public V setValue(V value)
{
throw new UnsupportedOperationException();
}
}
}
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