nextapp.echo.app.text.AbstractDocument Maven / Gradle / Ivy
/*
* This file is part of the Echo Web Application Framework (hereinafter "Echo").
* Copyright (C) 2002-2009 NextApp, Inc.
*
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
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*/
package nextapp.echo.app.text;
import java.io.Serializable;
import java.util.EventListener;
import nextapp.echo.app.event.DocumentEvent;
import nextapp.echo.app.event.DocumentListener;
import nextapp.echo.app.event.EventListenerList;
/**
* An abstract implementation of a text component model.
* Provides listener management and notification facilities.
*/
public abstract class AbstractDocument
implements Document, Serializable {
/**
* Listener storage facility.
*/
protected EventListenerList listenerList = new EventListenerList();
/**
* Default constructor.
*/
public AbstractDocument() {
super();
}
/**
* Adds a listener which will be notified of changes to the document.
*
* @param l the listener to add
* @see nextapp.echo.app.text.Document#addDocumentListener(DocumentListener)
*/
public void addDocumentListener(DocumentListener l) {
listenerList.addListener(DocumentListener.class, l);
}
/**
* Notifies listeners about an update to the document.
*
* @param e an event describing the changes to the document
*/
public void fireDocumentUpdate(DocumentEvent e) {
EventListener[] listeners = listenerList.getListeners(DocumentListener.class);
for (int index = 0; index < listeners.length; ++index) {
((DocumentListener) listeners[index]).documentUpdate(e);
}
}
/**
* Removes a listener from being notified of changes to the document.
*
* @param l the listener to remove
* @see nextapp.echo.app.text.Document#removeDocumentListener(DocumentListener)
*/
public void removeDocumentListener(DocumentListener l) {
listenerList.removeListener(DocumentListener.class, l);
}
}