| /******************************************************************************* |
| * 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 org.eclipse.jpt.common.utility.internal.model.AbstractModel; |
| import org.eclipse.jpt.common.utility.internal.model.ChangeSupport; |
| import org.eclipse.jpt.common.utility.internal.model.SingleAspectChangeSupport; |
| import org.eclipse.jpt.common.utility.model.listener.PropertyChangeListener; |
| import org.eclipse.jpt.common.utility.model.value.ModifiablePropertyValueModel; |
| |
| /** |
| * Implementation of {@link ModifiablePropertyValueModel} that simply holds on to |
| * an object, uses it as the value, and fires the appropriate event when the |
| * value changes. |
| * |
| * @param <V> the type of the model's value |
| */ |
| public class SimplePropertyValueModel<V> |
| extends AbstractModel |
| implements ModifiablePropertyValueModel<V> |
| { |
| /** The value. */ |
| protected V value; |
| |
| |
| /** |
| * Construct a property value model for the specified value. |
| */ |
| public SimplePropertyValueModel(V value) { |
| super(); |
| this.value = value; |
| } |
| |
| /** |
| * Construct a property value model with a value of <code>null</code>. |
| */ |
| public SimplePropertyValueModel() { |
| this(null); |
| } |
| |
| @Override |
| protected ChangeSupport buildChangeSupport() { |
| return new SingleAspectChangeSupport(this, PropertyChangeListener.class, VALUE); |
| } |
| |
| |
| public V getValue() { |
| return this.value; |
| } |
| |
| public void setValue(V value) { |
| V old = this.value; |
| this.value = value; |
| this.firePropertyChanged(VALUE, old, value); |
| } |
| |
| @Override |
| public void toString(StringBuilder sb) { |
| sb.append(this.value); |
| } |
| } |