/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.cocoon.woody.event.impl;
import org.apache.cocoon.util.ClassUtils;
import org.apache.cocoon.woody.event.WidgetListener;
import org.apache.cocoon.woody.event.WidgetListenerBuilder;
import org.apache.cocoon.woody.util.DomHelper;
import org.w3c.dom.Element;
/**
* A {@link WidgetListenerBuilder} that creates java classes.
* <p>
* The syntax for this listener is as follows :<br/>
* <pre>
* <java class="com.my.SuperListener"/>
* </pre>
*
* @author <a href="http://www.apache.org/~sylvain/">Sylvain Wallez</a>
* @version CVS $Id$
*/
public class JavaClassWidgetListenerBuilder implements WidgetListenerBuilder {
public static final JavaClassWidgetListenerBuilder INSTANCE = new JavaClassWidgetListenerBuilder();
public WidgetListener buildListener(Element element, Class listenerClass) throws Exception {
String name = DomHelper.getAttribute(element, "class");
Object listener = ClassUtils.newInstance(name);
if (listenerClass.isAssignableFrom(listener.getClass())) {
// FIXME : apply filecyclehelper
return (WidgetListener)listener;
} else {
throw new Exception("Class " + listener.getClass() + " is not a " + listenerClass);
}
}
}