/* $RCSfile$
* $Author$
* $Date$
* $Revision$
*
* Copyright (C) 2005-2007 The Jmol Development Team
*
* Contact: cdk-devel@lists.sourceforge.net
*
* 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 org.openscience.cdk.io.iterator.event;
import java.util.ArrayList;
import java.util.List;
import org.openscience.cdk.annotations.TestMethod;
import org.openscience.cdk.interfaces.IChemObject;
import org.openscience.cdk.io.ReaderEvent;
import org.openscience.cdk.io.listener.IChemObjectIOListener;
import org.openscience.cdk.io.listener.IReaderListener;
import org.openscience.cdk.io.setting.IOSetting;
/**
* Abstract class that IteratingChemObjectReader's can implement to have it
* take care of basic stuff, like managing the ReaderListeners.
*
* @cdk.module io
* @cdk.githash
*/
public abstract class DefaultEventChemObjectReader implements IEventChemObjectReader {
/**
* An event to be sent to listeners when a frame is read.
*/
private ReaderEvent frameReadEvent = null;
/**
* Holder of reader event listeners.
*/
private List<IChemObjectIOListener> listenerList = new ArrayList<IChemObjectIOListener>();
public void addChemObjectIOListener(IChemObjectIOListener listener) {
listenerList.add(listener);
}
public void removeChemObjectIOListener(IChemObjectIOListener listener) {
listenerList.remove(listener);
}
public boolean accepts(IChemObject object) {
return accepts(object.getClass());
}
public boolean accepts(Class objectClass) {
// leave it up the read(IChemObject) to decide by default
return true;
}
/* Extra convenience methods */
/**
* File IO generally does not support removing of entries.
*/
public void remove() {
throw new UnsupportedOperationException();
}
/**
* Sends a frame read event to the registered ReaderListeners.
*/
protected void fireFrameRead() {
for (int i = 0; i < listenerList.size(); ++i) {
IReaderListener listener = (IReaderListener) listenerList.get(i);
// Lazily create the event:
if (frameReadEvent == null) {
frameReadEvent = new ReaderEvent(this);
}
listener.frameRead(frameReadEvent);
}
}
protected void fireIOSettingQuestion(IOSetting setting) {
for (int i = 0; i < listenerList.size(); ++i) {
IChemObjectIOListener listener = listenerList.get(i);
listener.processIOSettingQuestion(setting);
}
}
public IOSetting[] getIOSettings() {
return new IOSetting[0];
}
}