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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 org.eclipse.jpt.utility.internal.model.AbstractModel;
import org.eclipse.jpt.utility.internal.model.ChangeSupport;
import org.eclipse.jpt.utility.internal.model.SingleAspectChangeSupport;
import org.eclipse.jpt.utility.model.listener.PropertyChangeListener;
import org.eclipse.jpt.utility.model.value.WritablePropertyValueModel;
/**
* Implementation of WritablePropertyValueModel that simply holds on to an
* object and uses it as the value.
*/
public class SimplePropertyValueModel<T>
extends AbstractModel
implements WritablePropertyValueModel<T>
{
/** The value. */
protected T value;
/**
* Construct a PropertyValueModel for the specified value.
*/
public SimplePropertyValueModel(T value) {
super();
this.value = value;
}
/**
* Construct a PropertyValueModel with a starting value of null.
*/
public SimplePropertyValueModel() {
this(null);
}
@Override
protected ChangeSupport buildChangeSupport() {
return new SingleAspectChangeSupport(this, PropertyChangeListener.class, VALUE);
}
public T getValue() {
return this.value;
}
public void setValue(T value) {
T old = this.value;
this.value = value;
this.firePropertyChanged(VALUE, old, value);
}
@Override
public void toString(StringBuilder sb) {
sb.append(this.value);
}
}
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