/*

 * 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.swing.time;

import java.beans.*;

import java.util.*;

import com.oracle.solaris.vp.util.misc.event.PropertyChangeListeners;

@SuppressWarnings({"serial"})

public class SimpleTimeModel implements TimeModel {

    //

    // Instance data

    //

    private Calendar cal = Calendar.getInstance();

    private long timeOffset;

    private PropertyChangeListeners listeners =

	new PropertyChangeListeners();

    //

    // Constructors

    //

    /**

     * Constructs a {@code SimpleTimeModel} with the specified {@link

     * #setTimeOffset offset}.

     */

    public SimpleTimeModel(long timeOffset) {

	setTimeOffset(timeOffset);

    }

    /**

     * Constructs a {@code SimpleTimeModel} with a zero {@link #setTimeOffset

     * offset} from the system clock.

     */

    public SimpleTimeModel() {

	this(0);

    }

    //

    // TimeModel methods

    //

    @Override

    public void addPropertyChangeListener(PropertyChangeListener listener) {

	listeners.add(listener);

    }

    @Override

    public void addPropertyChangeListener(String propertyName,

	PropertyChangeListener listener) {

	listeners.add(propertyName, listener);

    }

    @Override

    public Calendar getCalendar() {

	return (Calendar)cal.clone();

    }

    @Override

    public long getTimeOffset() {

	return timeOffset;

    }

    @Override

    public TimeZone getTimeZone() {

	return cal.getTimeZone();

    }

    @Override

    public void removePropertyChangeListener(PropertyChangeListener listener) {

	listeners.remove(listener);

    }

    @Override

    public void setTimeOffset(long timeOffset) {

	if (this.timeOffset != timeOffset) {

	    long oldValue = this.timeOffset;

	    this.timeOffset = timeOffset;

	    updateTime();

	    firePropertyChange(PROPERTY_TIME_OFFSET, (Long)oldValue,

		(Long)timeOffset);

	}

    }

    @Override

    public void setTimeZone(TimeZone timeZone) {

	TimeZone oldValue = cal.getTimeZone();

	if (!oldValue.equals(timeZone)) {

	    cal.setTimeZone(timeZone);

	    updateTime();

	    firePropertyChange(PROPERTY_TIME_ZONE, oldValue, timeZone);

	}

    }

    @Override

    public void updateTime() {

	long oldValue = cal.getTimeInMillis();

	long newValue = System.currentTimeMillis() + timeOffset;

	cal.setTimeInMillis(newValue);

	firePropertyChange(PROPERTY_TIME, (Long)oldValue, (Long)newValue);

    }

    //

    // SimpleTimeModel methods

    //

    public void firePropertyChange(String propertyName, Object oldValue,

	Object newValue) {

	PropertyChangeEvent event = new PropertyChangeEvent(

	    this, propertyName, oldValue, newValue);

	listeners.propertyChange(event);

    }

    public Calendar getModelCalendar() {

	return cal;

    }

}