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/*******************************************************************************
* Copyright (c) 2007, 2009 Oracle. 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:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.utility.internal.model.value;
import org.eclipse.jpt.utility.model.Model;
import org.eclipse.jpt.utility.model.event.StateChangeEvent;
import org.eclipse.jpt.utility.model.listener.StateChangeListener;
import org.eclipse.jpt.utility.model.value.CollectionValueModel;
import org.eclipse.jpt.utility.model.value.ListValueModel;
/**
* Extend {@link ItemAspectListValueModelAdapter} to listen to the
* "state" of each item in the wrapped list model.
*/
public class ItemStateListValueModelAdapter<E>
extends ItemAspectListValueModelAdapter<E>
{
/** Listener that listens to all the items in the list. */
protected final StateChangeListener itemStateListener;
// ********** constructors **********
/**
* Construct an adapter for the item state.
*/
public ItemStateListValueModelAdapter(ListValueModel<E> listHolder) {
super(listHolder);
this.itemStateListener = this.buildItemStateListener();
}
/**
* Construct an adapter for the item state.
*/
public ItemStateListValueModelAdapter(CollectionValueModel<E> collectionHolder) {
this(new CollectionListValueModelAdapter<E>(collectionHolder));
}
// ********** initialization **********
protected StateChangeListener buildItemStateListener() {
return new StateChangeListener() {
public void stateChanged(StateChangeEvent event) {
ItemStateListValueModelAdapter.this.itemAspectChanged(event);
}
@Override
public String toString() {
return "item state listener"; //$NON-NLS-1$
}
};
}
// ********** behavior **********
@Override
protected void engageItem_(Model item) {
item.addStateChangeListener(this.itemStateListener);
}
@Override
protected void disengageItem_(Model item) {
item.removeStateChangeListener(this.itemStateListener);
}
}
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