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/*******************************************************************************
* Copyright (c) 2007, 2012 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.common.utility.internal.model.value;
import java.util.Arrays;
import org.eclipse.jpt.common.utility.model.Model;
import org.eclipse.jpt.common.utility.model.event.CollectionAddEvent;
import org.eclipse.jpt.common.utility.model.event.CollectionChangeEvent;
import org.eclipse.jpt.common.utility.model.event.CollectionClearEvent;
import org.eclipse.jpt.common.utility.model.event.CollectionRemoveEvent;
import org.eclipse.jpt.common.utility.model.listener.CollectionChangeListener;
import org.eclipse.jpt.common.utility.model.value.ModifiablePropertyValueModel;
/**
* Extend {@link ValueAspectAdapter} to listen to one or more collection
* aspects of the value in the wrapped value model.
*/
public class ValueCollectionAdapter<V extends Model>
extends ValueAspectAdapter<V>
{
/** The names of the value's collections that we listen to. */
protected final String[] collectionNames;
/** Listener that listens to the value. */
protected final CollectionChangeListener valueCollectionListener;
// ********** constructors **********
/**
* Construct an adapter for the specified value collections.
*/
public ValueCollectionAdapter(ModifiablePropertyValueModel<V> valueHolder, String... collectionNames) {
super(valueHolder);
if (collectionNames == null) {
throw new NullPointerException();
}
this.collectionNames = collectionNames;
this.valueCollectionListener = this.buildValueCollectionListener();
}
// ********** initialization **********
protected CollectionChangeListener buildValueCollectionListener() {
return new CollectionChangeListener() {
public void itemsAdded(CollectionAddEvent event) {
ValueCollectionAdapter.this.itemsAdded(event);
}
public void itemsRemoved(CollectionRemoveEvent event) {
ValueCollectionAdapter.this.itemsRemoved(event);
}
public void collectionCleared(CollectionClearEvent event) {
ValueCollectionAdapter.this.collectionCleared(event);
}
public void collectionChanged(CollectionChangeEvent event) {
ValueCollectionAdapter.this.collectionChanged(event);
}
@Override
public String toString() {
return "value collection listener: " + Arrays.asList(ValueCollectionAdapter.this.collectionNames); //$NON-NLS-1$
}
};
}
// ********** ValueAspectAdapter implementation **********
@Override
protected void engageValue_() {
for (String collectionName : this.collectionNames) {
this.value.addCollectionChangeListener(collectionName, this.valueCollectionListener);
}
}
@Override
protected void disengageValue_() {
for (String collectionName : this.collectionNames) {
this.value.removeCollectionChangeListener(collectionName, this.valueCollectionListener);
}
}
// ********** change events **********
protected void itemsAdded(@SuppressWarnings("unused") CollectionAddEvent event) {
this.valueAspectChanged();
}
protected void itemsRemoved(@SuppressWarnings("unused") CollectionRemoveEvent event) {
this.valueAspectChanged();
}
protected void collectionCleared(@SuppressWarnings("unused") CollectionClearEvent event) {
this.valueAspectChanged();
}
protected void collectionChanged(@SuppressWarnings("unused") CollectionChangeEvent event) {
this.valueAspectChanged();
}
}
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