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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.WritablePropertyValueModel;
/**
* Extend ValueAspectAdapter to listen to one or more list
* aspects of the value in the wrapped value model.
*/
public class ValueListAdapter<T extends Model>
extends ValueAspectAdapter<T>
{
/** The names of the value's lists that we listen to. */
protected final String[] listNames;
/** Listener that listens to the value. */
protected final ListChangeListener valueListListener;
// ********** constructors **********
/**
* Construct an adapter for the specified value lists.
*/
public ValueListAdapter(WritablePropertyValueModel<T> valueHolder, String... listNames) {
super(valueHolder);
this.listNames = listNames;
this.valueListListener = this.buildValueListListener();
}
// ********** initialization **********
/**
* All we really care about is the fact that a List aspect has
* changed. Do the same thing no matter which event occurs.
*/
protected ListChangeListener buildValueListListener() {
return new ListChangeListener() {
public void itemsAdded(ListChangeEvent event) {
ValueListAdapter.this.valueAspectChanged();
}
public void itemsRemoved(ListChangeEvent event) {
ValueListAdapter.this.valueAspectChanged();
}
public void itemsReplaced(ListChangeEvent event) {
ValueListAdapter.this.valueAspectChanged();
}
public void itemsMoved(ListChangeEvent event) {
ValueListAdapter.this.valueAspectChanged();
}
public void listCleared(ListChangeEvent event) {
ValueListAdapter.this.valueAspectChanged();
}
public void listChanged(ListChangeEvent event) {
ValueListAdapter.this.valueAspectChanged();
}
@Override
public String toString() {
return "value list listener: " + Arrays.asList(ValueListAdapter.this.listNames);
}
};
}
@Override
protected void engageValue_() {
for (String listName : this.listNames) {
this.value.addListChangeListener(listName, this.valueListListener);
}
}
@Override
protected void disengageValue_() {
for (String listName : this.listNames) {
this.value.removeListChangeListener(listName, this.valueListListener);
}
}
}
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