/**
 * Copyright 2010-2014 Jingjing Li.
 *
 * This file is part of jplot2d.
 *
 * jplot2d is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or any later version.
 *
 * jplot2d is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Lesser Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with jplot2d. If not, see .
 */
package org.jplot2d.swing.proptable.property;

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;

/**
 * Main property who has value and can read from / write to a engine object
 * 
 * @author Jingjing Li
 * 
 * @param 
 *            the value type
 */
public abstract class MainProperty implements Property {

    private T value;

    private transient PropertyChangeSupport listeners = new PropertyChangeSupport(
            this);

    public T getValue() {
        return value;
    }

    public void setValue(T value) {
        Object oldValue = this.value;
        this.value = value;
        if (value != oldValue && (value == null || !value.equals(oldValue))) {
            firePropertyChange(oldValue, getValue());
        }
    }

    public void addPropertyChangeListener(PropertyChangeListener listener) {
        listeners.addPropertyChangeListener(listener);
        Property[] subProperties = getSubProperties();
        if (subProperties != null)
            for (Property property : subProperties) {
                if (property instanceof MainProperty) {
                    ((MainProperty) property)
                            .addPropertyChangeListener(listener);
                }
            }

    }

    public void removePropertyChangeListener(PropertyChangeListener listener) {
        listeners.removePropertyChangeListener(listener);
        Property[] subProperties = getSubProperties();
        if (subProperties != null)
            for (Property property : subProperties) {
                if (property instanceof MainProperty) {
                    ((MainProperty) property)
                            .removePropertyChangeListener(listener);
                }
            }
    }

    protected void firePropertyChange(Object oldValue, Object newValue) {
        listeners.firePropertyChange("value", oldValue, newValue);
    }

    public Property[] getSubProperties() {
        return null;
    }

    /**
     * Load property from the given object.
     * 
     * @param object
     * @throws Throwable
     */
    public abstract void readFromObject(Object object);

    /**
     * Write property to the given object.
     * 
     * @param object
     * @throws Throwable
     */
    public abstract void writeToObject(Object object) throws Throwable;

    public Object[] getAvailableValues() {
        return null;
    }

    public String toString() {
        return "MainProperty " + getName();
    }

}