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/*******************************************************************************
* Copyright (c) 2007, 2008 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 java.util.Arrays;
import org.eclipse.jpt.utility.model.Model;
import org.eclipse.jpt.utility.model.event.PropertyChangeEvent;
import org.eclipse.jpt.utility.model.listener.PropertyChangeListener;
import org.eclipse.jpt.utility.model.value.CollectionValueModel;
import org.eclipse.jpt.utility.model.value.ListValueModel;
/**
* Extend ItemAspectListValueModelAdapter to listen to one or more
* properties of each item in the wrapped list model.
*/
public class ItemPropertyListValueModelAdapter<E>
extends ItemAspectListValueModelAdapter<E>
{
/** The names of the items' properties that we listen to. */
protected final String[] propertyNames;
/** Listener that listens to all the items in the list. */
protected final PropertyChangeListener itemPropertyListener;
// ********** constructors **********
/**
* Construct an adapter for the specified item properties.
*/
public ItemPropertyListValueModelAdapter(ListValueModel<E> listHolder, String... propertyNames) {
super(listHolder);
this.propertyNames = propertyNames;
this.itemPropertyListener = this.buildItemPropertyListener();
}
/**
* Construct an adapter for the specified item properties.
*/
public ItemPropertyListValueModelAdapter(CollectionValueModel<E> collectionHolder, String... propertyNames) {
this(new CollectionListValueModelAdapter<E>(collectionHolder), propertyNames);
}
// ********** initialization **********
protected PropertyChangeListener buildItemPropertyListener() {
return new PropertyChangeListener() {
public void propertyChanged(PropertyChangeEvent event) {
ItemPropertyListValueModelAdapter.this.itemAspectChanged(event);
}
@Override
public String toString() {
return "item property listener: " + Arrays.asList(ItemPropertyListValueModelAdapter.this.propertyNames);
}
};
}
// ********** behavior **********
@Override
protected void startListeningToItem(Model item) {
for (String propertyName : this.propertyNames) {
item.addPropertyChangeListener(propertyName, this.itemPropertyListener);
}
}
@Override
protected void stopListeningToItem(Model item) {
for (String propertyName : this.propertyNames) {
item.removePropertyChangeListener(propertyName, this.itemPropertyListener);
}
}
}
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