/*

 * CDDL HEADER START

 *

 * The contents of this file are subject to the terms of the

 * Common Development and Distribution License (the "License").

 * You may not use this file except in compliance with the License.

 *

 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

 * or http://www.opensolaris.org/os/licensing.

 * See the License for the specific language governing permissions

 * and limitations under the License.

 *

 * When distributing Covered Code, include this CDDL HEADER in each

 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.

 * If applicable, add the following below this CDDL HEADER, with the

 * fields enclosed by brackets "[]" replaced with your own identifying

 * information: Portions Copyright [yyyy] [name of copyright owner]

 *

 * CDDL HEADER END

 */

/*

 * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved.

 */

package com.oracle.solaris.vp.util.misc.property;

import javax.swing.event.*;

import com.oracle.solaris.vp.util.misc.ObjectUtil;

/**

 * The {@code PropertyPropertySynchronizer} class synchronizes a {@link

 * MutableProperty} with another {@link MutableProperty} so that changes in one

 * will automatically be reflected in the other.

 */

public class PropertyPropertySynchronizer<T>

    extends PropertySynchronizer<T, MutableProperty<T>> {

    //

    // Instance data

    //

    private ChangeListener listener =

	new ChangeListener() {

	    @Override

	    public void stateChanged(ChangeEvent e) {

		objectChanged();

	    }

	};

    //

    // Constructors

    //

    public PropertyPropertySynchronizer(MutableProperty<T> property,

	MutableProperty<T> property2, boolean initFromProp) {

	super(property, property2, initFromProp);

	property2.addChangeListener(listener);

    }

    /**

     * Constructs a {@code PropertyPropertySynchronizer} with initial

     * synchronization from {@code property} to {@code property2}.

     */

    public PropertyPropertySynchronizer(MutableProperty<T> property,

	MutableProperty<T> property2) {

	this(property, property2, true);

    }

    //

    // PropertySynchronizer methods

    //

    @Override

    protected boolean differ() {

	return super.differ() || !ObjectUtil.equals(getSavedValue(),

	    getProperty().getSavedValue());

    }

    @Override

    public void desynchronize() {

	super.desynchronize();

	getObject().removeChangeListener(listener);

    }

    @Override

    public T getValue() {

	return getObject().getValue();

    }

    @Override

    protected void syncObjectChanges() {

	super.syncObjectChanges();

	T value = getSavedValue();

	getProperty().setSavedValue(value);

    }

    @Override

    protected void syncPropertyChanges() {

	super.syncPropertyChanges();

	T value = getProperty().getSavedValue();

	setSavedValue(value);

    }

    @Override

    public void setValue(T value) {

	getObject().setValue(value);

    }

    //

    // PropertyPropertySynchronizer methods

    //

    public T getSavedValue() {

	return getObject().getSavedValue();

    }

    public void setSavedValue(T SavedValue) {

	getObject().setSavedValue(SavedValue);

    }

}