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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.ListChangeEvent;
import org.eclipse.jpt.utility.model.listener.ListChangeListener;
import org.eclipse.jpt.utility.model.value.CollectionValueModel;
import org.eclipse.jpt.utility.model.value.ListValueModel;
/**
* Extend ItemAspectListValueModelAdapter to listen to one or more list
* aspects of each item in the wrapped list model.
*/
public class ItemListListValueModelAdapter<E>
extends ItemAspectListValueModelAdapter<E>
{
/** The names of the subject's lists that we listen to. */
protected final String[] listNames;
/** Listener that listens to all the items in the list. */
protected final ListChangeListener itemListListener;
// ********** constructors **********
/**
* Construct an adapter for the specified item List aspects.
*/
public ItemListListValueModelAdapter(ListValueModel<E> listHolder, String... listNames) {
super(listHolder);
this.listNames = listNames;
this.itemListListener = this.buildItemListListener();
}
/**
* Construct an adapter for the specified item List aspects.
*/
public ItemListListValueModelAdapter(CollectionValueModel<E> collectionHolder, String... listNames) {
this(new CollectionListValueModelAdapter<E>(collectionHolder), listNames);
}
// ********** initialization **********
/**
* All we really care about is the fact that the List aspect has
* changed. Do the same thing no matter which event occurs.
*/
protected ListChangeListener buildItemListListener() {
return new ListChangeListener() {
public void itemsAdded(ListChangeEvent event) {
ItemListListValueModelAdapter.this.itemAspectChanged(event);
}
public void itemsRemoved(ListChangeEvent event) {
ItemListListValueModelAdapter.this.itemAspectChanged(event);
}
public void itemsReplaced(ListChangeEvent event) {
ItemListListValueModelAdapter.this.itemAspectChanged(event);
}
public void itemsMoved(ListChangeEvent event) {
ItemListListValueModelAdapter.this.itemAspectChanged(event);
}
public void listCleared(ListChangeEvent event) {
ItemListListValueModelAdapter.this.itemAspectChanged(event);
}
public void listChanged(ListChangeEvent event) {
ItemListListValueModelAdapter.this.itemAspectChanged(event);
}
@Override
public String toString() {
return "item list listener: " + Arrays.asList(ItemListListValueModelAdapter.this.listNames);
}
};
}
// ********** behavior **********
@Override
protected void startListeningToItem(Model item) {
for (String listName : this.listNames) {
item.addListChangeListener(listName, this.itemListListener);
}
}
@Override
protected void stopListeningToItem(Model item) {
for (String listName : this.listNames) {
item.removeListChangeListener(listName, this.itemListListener);
}
}
}
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