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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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 Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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package javax.swing;

import javax.swing.event.*;
import java.util.EventObject;
import java.io.Serializable;

A base class for CellEditors, providing default
implementations for the methods in the CellEditor
interface except getCellEditorValue().
Like the other abstract implementations in Swing, also manages a list
of listeners.

Warning:
Serialized objects of this class will not be compatible with
future Swing releases. The current serialization support is
appropriate for short term storage or RMI between applications running
the same version of Swing.  As of 1.4, support for long term storage
of all JavaBeans™
has been added to the java.beans package. Please see XMLEncoder. 
Author:
Philip Milne
Since:
1.3/**
 *
 * A base class for <code>CellEditors</code>, providing default
 * implementations for the methods in the <code>CellEditor</code>
 * interface except <code>getCellEditorValue()</code>.
 * Like the other abstract implementations in Swing, also manages a list
 * of listeners.
 *
 * <p>
 * <strong>Warning:</strong>
 * Serialized objects of this class will not be compatible with
 * future Swing releases. The current serialization support is
 * appropriate for short term storage or RMI between applications running
 * the same version of Swing.  As of 1.4, support for long term storage
 * of all JavaBeans&trade;
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @author Philip Milne
 * @since 1.3
 */

public abstract class AbstractCellEditor implements CellEditor, Serializable {

    protected EventListenerList listenerList = new EventListenerList();
    transient protected ChangeEvent changeEvent = null;

    // Force this to be implemented.
    // public Object  getCellEditorValue()

    
Returns true.
Params:
e –  an event object
Returns:
true/**
     * Returns true.
     * @param e  an event object
     * @return true
     */
    public boolean isCellEditable(EventObject e) {
        return true;
    }

    
Returns true.
Params:
anEvent –  an event object
Returns:
true/**
     * Returns true.
     * @param anEvent  an event object
     * @return true
     */
    public boolean shouldSelectCell(EventObject anEvent) {
        return true;
    }

    
Calls fireEditingStopped and returns true.
Returns:
true/**
     * Calls <code>fireEditingStopped</code> and returns true.
     * @return true
     */
    public boolean stopCellEditing() {
        fireEditingStopped();
        return true;
    }

    
Calls fireEditingCanceled.
/**
     * Calls <code>fireEditingCanceled</code>.
     */
    public void  cancelCellEditing() {
        fireEditingCanceled();
    }

    
Adds a CellEditorListener to the listener list.
Params:
l –  the new listener to be added/**
     * Adds a <code>CellEditorListener</code> to the listener list.
     * @param l  the new listener to be added
     */
    public void addCellEditorListener(CellEditorListener l) {
        listenerList.add(CellEditorListener.class, l);
    }

    
Removes a CellEditorListener from the listener list.
Params:
l –  the listener to be removed/**
     * Removes a <code>CellEditorListener</code> from the listener list.
     * @param l  the listener to be removed
     */
    public void removeCellEditorListener(CellEditorListener l) {
        listenerList.remove(CellEditorListener.class, l);
    }

    
Returns an array of all the CellEditorListeners added
to this AbstractCellEditor with addCellEditorListener().
Returns:
all of the CellEditorListeners added or an empty
        array if no listeners have been added
Since:
1.4/**
     * Returns an array of all the <code>CellEditorListener</code>s added
     * to this AbstractCellEditor with addCellEditorListener().
     *
     * @return all of the <code>CellEditorListener</code>s added or an empty
     *         array if no listeners have been added
     * @since 1.4
     */
    public CellEditorListener[] getCellEditorListeners() {
        return listenerList.getListeners(CellEditorListener.class);
    }

    
Notifies all listeners that have registered interest for
notification on this event type.  The event instance
is created lazily.
See Also:
EventListenerList/**
     * Notifies all listeners that have registered interest for
     * notification on this event type.  The event instance
     * is created lazily.
     *
     * @see EventListenerList
     */
    protected void fireEditingStopped() {
        // Guaranteed to return a non-null array
        Object[] listeners = listenerList.getListenerList();
        // Process the listeners last to first, notifying
        // those that are interested in this event
        for (int i = listeners.length-2; i>=0; i-=2) {
            if (listeners[i]==CellEditorListener.class) {
                // Lazily create the event:
                if (changeEvent == null)
                    changeEvent = new ChangeEvent(this);
                ((CellEditorListener)listeners[i+1]).editingStopped(changeEvent);
            }
        }
    }

    
Notifies all listeners that have registered interest for
notification on this event type.  The event instance
is created lazily.
See Also:
EventListenerList/**
     * Notifies all listeners that have registered interest for
     * notification on this event type.  The event instance
     * is created lazily.
     *
     * @see EventListenerList
     */
    protected void fireEditingCanceled() {
        // Guaranteed to return a non-null array
        Object[] listeners = listenerList.getListenerList();
        // Process the listeners last to first, notifying
        // those that are interested in this event
        for (int i = listeners.length-2; i>=0; i-=2) {
            if (listeners[i]==CellEditorListener.class) {
                // Lazily create the event:
                if (changeEvent == null)
                    changeEvent = new ChangeEvent(this);
                ((CellEditorListener)listeners[i+1]).editingCanceled(changeEvent);
            }
        }
    }
}