EMFEditMapProperty.java

/*******************************************************************************
 * Copyright (c) 2008 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 - initial API and implementation (bug 194734)
 *     Matthew Hall - bug 195222
 *     Tom Schindl<tom.schindl@bestsolution.at> - Port to EMF
 ******************************************************************************/
package org.eclipse.emf.databinding.edit.properties.internal;

import java.util.Map;

import org.eclipse.core.databinding.observable.Diffs;
import org.eclipse.core.databinding.observable.map.MapDiff;
import org.eclipse.core.databinding.property.INativePropertyListener;
import org.eclipse.core.databinding.property.ISimplePropertyListener;
import org.eclipse.core.databinding.property.SimplePropertyEvent;
import org.eclipse.core.databinding.property.map.SimpleMapProperty;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.common.notify.Adapter;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.notify.impl.AdapterImpl;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.edit.command.SetCommand;
import org.eclipse.emf.edit.domain.EditingDomain;

/**
 * <p>
 * <b>PROVISIONAL This API is subject to arbitrary change, including renaming or
 * removal.</b>
 * </p>
 * @since 1.1
 */
public class EMFEditMapProperty extends SimpleMapProperty {
	
	private final EStructuralFeature feature;
	private final Class<?> keyType;
	private final Class<?> valueType;
	private EditingDomain domain;
	
	/**
	 * @param feature
	 * @param keyType
	 * @param valueType
	 */
	public EMFEditMapProperty(EditingDomain domain, EStructuralFeature feature, Class<?> keyType, Class<?> valueType) {
		this.feature = feature;
		this.keyType = keyType;
		this.valueType = valueType;
		this.domain = domain;
	}
	
	public Object getKeyType() {
		return keyType;
	}

	public Object getValueType() {
		return valueType;
	}

	@Override
	protected Map<?,?> doGetMap(Object source) {
		EObject eObj = (EObject) source;
		return (Map<?,?>) eObj.eGet(feature);
	}
	
	@SuppressWarnings("unchecked")
	@Override
	protected void doSetMap(Object source, Map map, MapDiff diff) {
		EObject eObject = (EObject)source;
	    Command command = SetCommand.create(domain, eObject, feature, map);
	    domain.getCommandStack().execute(command);
	}
	
	@Override
	public INativePropertyListener adaptListener(
			ISimplePropertyListener listener) {
		return new Listener(listener);
	}
	
	private class Listener extends AdapterImpl implements INativePropertyListener {
		private final ISimplePropertyListener listener;

		private Listener(ISimplePropertyListener listener) {
			this.listener = listener;
		}
		
		@Override
		public void notifyChanged(Notification msg) {
			if (feature == msg.getFeature() && !msg.isTouch())
	        {
	          // TODO
	          // This assumes we only get a SET notification, which isn't a good assumption.
	          //
	          final MapDiff diff = Diffs.createMapDiffSingleChange(msg.getNotifier(), msg.getOldValue(), msg.getNewValue());
	          listener.handlePropertyChange(new SimplePropertyEvent(msg
						.getNotifier(), EMFEditMapProperty.this, diff));
	        }
		}
	}

	@Override
	protected void doAddListener(Object source, INativePropertyListener listener) {
		EObject eObj = (EObject) source;
		eObj.eAdapters().add((Adapter) listener);
	}

	@Override
	protected void doRemoveListener(Object source,
			INativePropertyListener listener) {
		EObject eObj = (EObject) source;
		eObj.eAdapters().remove((Adapter) listener);
	}

	

	

}