001// Copyright 2005 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 015package org.apache.tapestry.annotations; 016 017import java.lang.reflect.Method; 018 019import org.apache.hivemind.ApplicationRuntimeException; 020import org.apache.hivemind.Location; 021import org.apache.tapestry.enhance.EnhancementOperation; 022import org.apache.tapestry.spec.BindingSpecification; 023import org.apache.tapestry.spec.BindingType; 024import org.apache.tapestry.spec.ContainedComponent; 025import org.apache.tapestry.spec.IBindingSpecification; 026import org.apache.tapestry.spec.IComponentSpecification; 027import org.apache.tapestry.spec.IContainedComponent; 028 029/** 030 * Adds a {@link org.apache.tapestry.spec.IContainedComponent} to the 031 * {@link org.apache.tapestry.spec.IComponentSpecification}. 032 * 033 * @author Howard Lewis Ship 034 * @since 4.0 035 * @see org.apache.tapestry.annotations.Component 036 * @see org.apache.tapestry.annotations.Binding 037 */ 038public class ComponentAnnotationWorker implements MethodAnnotationEnhancementWorker 039{ 040 041 public void performEnhancement(EnhancementOperation op, IComponentSpecification spec, 042 Method method, Location location) 043 { 044 Component component = method.getAnnotation(Component.class); 045 046 String propertyName = AnnotationUtils.getPropertyName(method); 047 048 IContainedComponent cc = new ContainedComponent(); 049 050 cc.setInheritInformalParameters(component.inheritInformalParameters()); 051 cc.setType(component.type()); 052 cc.setPropertyName(propertyName); 053 cc.setLocation(location); 054 055 for (String binding : component.bindings()) 056 { 057 addBinding(cc, binding, location); 058 } 059 060 String id = component.id(); 061 062 if (id.equals("")) 063 id = propertyName; 064 065 spec.addComponent(id, cc); 066 } 067 068 void addBinding(IContainedComponent component, String binding, Location location) 069 { 070 int equalsx = binding.indexOf('='); 071 072 if (equalsx < 1) 073 invalidBinding(binding); 074 075 if (equalsx + 1 >= binding.length()) 076 invalidBinding(binding); 077 078 String name = binding.substring(0, equalsx).trim(); 079 String value = binding.substring(equalsx + 1).trim(); 080 081 IBindingSpecification bs = new BindingSpecification(); 082 bs.setType(BindingType.PREFIXED); 083 bs.setValue(value); 084 bs.setLocation(location); 085 086 component.setBinding(name, bs); 087 } 088 089 private void invalidBinding(String binding) 090 { 091 throw new ApplicationRuntimeException(AnnotationMessages.bindingWrongFormat(binding)); 092 } 093}