| /* |
| * 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.forms.event.impl; |
| |
| import org.apache.cocoon.components.LifecycleHelper; |
| import org.apache.cocoon.forms.event.WidgetListener; |
| import org.apache.cocoon.forms.event.WidgetListenerBuilder; |
| import org.apache.cocoon.forms.util.DomHelper; |
| import org.apache.cocoon.util.ClassUtils; |
| import org.apache.cocoon.util.ConfigurationUtil; |
| import org.apache.avalon.framework.context.Context; |
| import org.apache.avalon.framework.context.ContextException; |
| import org.apache.avalon.framework.context.Contextualizable; |
| import org.apache.avalon.framework.logger.AbstractLogEnabled; |
| import org.apache.avalon.framework.service.ServiceException; |
| import org.apache.avalon.framework.service.ServiceManager; |
| import org.apache.avalon.framework.service.Serviceable; |
| import org.apache.avalon.framework.thread.ThreadSafe; |
| 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> |
| * |
| * @version $Id$ |
| */ |
| public class JavaClassWidgetListenerBuilder |
| extends AbstractLogEnabled |
| implements WidgetListenerBuilder, ThreadSafe, Contextualizable, Serviceable { |
| |
| protected ServiceManager manager; |
| |
| protected Context context; |
| |
| /** |
| * @see org.apache.avalon.framework.context.Contextualizable#contextualize(org.apache.avalon.framework.context.Context) |
| */ |
| public void contextualize(Context context) throws ContextException { |
| this.context = context; |
| } |
| |
| /** |
| * @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager) |
| */ |
| public void service(ServiceManager manager) throws ServiceException { |
| this.manager = manager; |
| } |
| |
| /** |
| * @see org.apache.cocoon.forms.event.WidgetListenerBuilder#buildListener(org.w3c.dom.Element, java.lang.Class) |
| */ |
| 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())) { |
| LifecycleHelper.setupComponent(listener, this.getLogger(), this.context, manager, ConfigurationUtil.toConfiguration(element)); |
| return (WidgetListener)listener; |
| } else { |
| throw new Exception("Class " + listener.getClass() + " is not a " + listenerClass); |
| } |
| } |
| } |