001 // Copyright May 14, 2006 The Apache Software Foundation 002 // 003 // Licensed under the Apache License, Version 2.0 (the "License"); 004 // you may not use this file except in compliance with the License. 005 // You may obtain a copy of the License at 006 // 007 // http://www.apache.org/licenses/LICENSE-2.0 008 // 009 // Unless required by applicable law or agreed to in writing, software 010 // distributed under the License is distributed on an "AS IS" BASIS, 011 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012 // See the License for the specific language governing permissions and 013 // limitations under the License. 014 package org.apache.tapestry.annotations; 015 016 import org.apache.hivemind.ApplicationRuntimeException; 017 import org.apache.hivemind.Resource; 018 import org.apache.tapestry.enhance.EnhancementOperation; 019 import org.apache.tapestry.spec.IComponentSpecification; 020 021 import java.lang.reflect.Method; 022 023 024 /** 025 * Performs {@link EventListener} annotation enhancements on components. 026 * 027 * @author jkuhnert 028 */ 029 public class EventListenerAnnotationWorker implements SecondaryAnnotationWorker 030 { 031 /** 032 * {@inheritDoc} 033 */ 034 public boolean canEnhance(Method method) 035 { 036 return method.getAnnotation(EventListener.class) != null; 037 } 038 039 /** 040 * {@inheritDoc} 041 */ 042 public void peformEnhancement(EnhancementOperation op, IComponentSpecification spec, Method method, Resource classResource) 043 { 044 EventListener listener = method.getAnnotation(EventListener.class); 045 046 String[] targets = listener.targets(); 047 String[] elements = listener.elements(); 048 String formId = listener.submitForm(); 049 boolean validateForm = listener.validateForm(); 050 boolean async = listener.async(); 051 boolean focus = listener.focus(); 052 boolean autoSubmit = listener.autoSubmit(); 053 054 if (targets.length < 1 && elements.length < 1) 055 throw new ApplicationRuntimeException(AnnotationMessages.targetsNotFound(method)); 056 057 for (int i=0; i < targets.length; i++) 058 { 059 spec.addEventListener(targets[i], listener.events(), 060 method.getName(), formId, validateForm, async, focus, autoSubmit); 061 } 062 063 for (int i=0; i < elements.length; i++) 064 { 065 spec.addElementEventListener(elements[i], listener.events(), 066 method.getName(), formId, validateForm, async, focus); 067 } 068 } 069 }