| /******************************************************************************* |
| * 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.WritablePropertyValueModel; |
| |
| /** |
| * Extend {@link ValueAspectAdapter} to listen to the |
| * "state" of the value in the wrapped value model. |
| */ |
| public class ValueStateAdapter<V extends Model> |
| extends ValueAspectAdapter<V> |
| { |
| /** Listener that listens to value. */ |
| protected final StateChangeListener valueStateListener; |
| |
| |
| // ********** constructors ********** |
| |
| /** |
| * Construct an adapter for the value state. |
| */ |
| public ValueStateAdapter(WritablePropertyValueModel<V> valueHolder) { |
| super(valueHolder); |
| this.valueStateListener = this.buildValueStateListener(); |
| } |
| |
| |
| // ********** initialization ********** |
| |
| protected StateChangeListener buildValueStateListener() { |
| return new StateChangeListener() { |
| public void stateChanged(StateChangeEvent event) { |
| ValueStateAdapter.this.stateChanged(event); |
| } |
| @Override |
| public String toString() { |
| return "value state listener"; //$NON-NLS-1$ |
| } |
| }; |
| } |
| |
| |
| // ********** ValueAspectAdapter implementation ********** |
| |
| @Override |
| protected void engageValue_() { |
| this.value.addStateChangeListener(this.valueStateListener); |
| } |
| |
| @Override |
| protected void disengageValue_() { |
| this.value.removeStateChangeListener(this.valueStateListener); |
| } |
| |
| |
| // ********** change events ********** |
| |
| protected void stateChanged(@SuppressWarnings("unused") StateChangeEvent event) { |
| this.valueAspectChanged(); |
| } |
| |
| } |