/*
* Entagged Audio Tag library
* Copyright (c) 2003-2005 Christian Laireiter <liree@web.de>
*
* This library 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 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package entagged.audioformats.generic;
import java.io.File;
import java.util.Enumeration;
import java.util.Vector;
import entagged.audioformats.AudioFile;
import entagged.audioformats.exceptions.ModifyVetoException;
/**
* This class multicasts the events to multiple listener instances.<br>
* Additionally the Vetos are handled. (other listeners are notified).
*
* @author Christian Laireiter
*/
public class ModificationHandler implements AudioFileModificationListener {
/**
* The listeners to wich events are broadcasted are stored here.
*/
private Vector listeners = new Vector();
/**
* This method adds an {@link AudioFileModificationListener}
*
* @param l
* Listener to add.
*/
public void addAudioFileModificationListener(AudioFileModificationListener l) {
if (!this.listeners.contains(l)) {
this.listeners.add(l);
}
}
/**
* (overridden)
*
* @see entagged.audioformats.generic.AudioFileModificationListener#fileModified(entagged.audioformats.AudioFile,
* java.io.File)
*/
public void fileModified(AudioFile original, File temporary)
throws ModifyVetoException {
Enumeration enumer = this.listeners.elements();
while (enumer.hasMoreElements()) {
AudioFileModificationListener current = (AudioFileModificationListener) enumer
.nextElement();
try {
current.fileModified(original, temporary);
} catch (ModifyVetoException e) {
vetoThrown(current, original, e);
throw e;
}
}
}
/**
* (overridden)
*
* @see entagged.audioformats.generic.AudioFileModificationListener#fileOperationFinished(java.io.File)
*/
public void fileOperationFinished(File result) {
Enumeration enumer = this.listeners.elements();
while (enumer.hasMoreElements()) {
AudioFileModificationListener current = (AudioFileModificationListener) enumer
.nextElement();
current.fileOperationFinished(result);
}
}
/**
* (overridden)
*
* @see entagged.audioformats.generic.AudioFileModificationListener#fileWillBeModified(entagged.audioformats.AudioFile,
* boolean)
*/
public void fileWillBeModified(AudioFile file, boolean delete)
throws ModifyVetoException {
Enumeration enumer = this.listeners.elements();
while (enumer.hasMoreElements()) {
AudioFileModificationListener current = (AudioFileModificationListener) enumer
.nextElement();
try {
current.fileWillBeModified(file, delete);
} catch (ModifyVetoException e) {
vetoThrown(current, file, e);
throw e;
}
}
}
/**
* This method removes an {@link AudioFileModificationListener}
*
* @param l
* Listener to remove.
*/
public void removeAudioFileModificationListener(
AudioFileModificationListener l) {
if (this.listeners.contains(l)) {
this.listeners.remove(l);
}
}
/**
* (overridden)
*
* @see entagged.audioformats.generic.AudioFileModificationListener#vetoThrown(entagged.audioformats.generic.AudioFileModificationListener,
* entagged.audioformats.AudioFile,
* entagged.audioformats.exceptions.ModifyVetoException)
*/
public void vetoThrown(AudioFileModificationListener cause,
AudioFile original, ModifyVetoException veto) {
Enumeration enumer = this.listeners.elements();
while (enumer.hasMoreElements()) {
AudioFileModificationListener current = (AudioFileModificationListener) enumer
.nextElement();
current.vetoThrown(cause, original, veto);
}
}
}