001 // Copyright 2008, 2009, 2010, 2011 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. 014 015 package org.apache.tapestry5.ioc.internal.services; 016 017 import java.lang.reflect.Method; 018 019 import org.apache.tapestry5.ioc.AnnotationAccess; 020 import org.apache.tapestry5.ioc.MethodAdvice; 021 import org.apache.tapestry5.ioc.annotations.PreventServiceDecoration; 022 import org.apache.tapestry5.ioc.internal.AnnotationAccessImpl; 023 import org.apache.tapestry5.ioc.internal.util.InternalUtils; 024 import org.apache.tapestry5.ioc.services.AspectDecorator; 025 import org.apache.tapestry5.ioc.services.AspectInterceptorBuilder; 026 import org.apache.tapestry5.ioc.services.Builtin; 027 import org.apache.tapestry5.ioc.services.PlasticProxyFactory; 028 029 @PreventServiceDecoration 030 public class AspectDecoratorImpl implements AspectDecorator 031 { 032 private final PlasticProxyFactory proxyFactory; 033 034 public AspectDecoratorImpl(@Builtin 035 PlasticProxyFactory proxyFactory) 036 { 037 this.proxyFactory = proxyFactory; 038 } 039 040 public <T> T build(Class<T> serviceInterface, T delegate, MethodAdvice advice, String description) 041 { 042 assert advice != null; 043 AspectInterceptorBuilder<T> builder = createBuilder(serviceInterface, delegate, description); 044 045 builder.adviseAllMethods(advice); 046 047 return builder.build(); 048 } 049 050 public <T> AspectInterceptorBuilder<T> createBuilder(Class<T> serviceInterface, final T delegate, String description) 051 { 052 return createBuilder(serviceInterface, delegate, new AnnotationAccessImpl(serviceInterface), description); 053 } 054 055 public <T> AspectInterceptorBuilder<T> createBuilder(final Class<T> serviceInterface, final T delegate, 056 AnnotationAccess annotationAccess, final String description) 057 { 058 assert serviceInterface != null; 059 assert delegate != null; 060 assert InternalUtils.isNonBlank(description); 061 062 // The inner class here prevents the needless creation of the AspectInterceptorBuilderImpl, 063 // and the various Plastic related overhead, until there's some actual advice. 064 065 return new AbtractAspectInterceptorBuilder<T>(annotationAccess) 066 { 067 private AspectInterceptorBuilder<T> builder; 068 069 public void adviseMethod(Method method, MethodAdvice advice) 070 { 071 getBuilder().adviseMethod(method, advice); 072 } 073 074 public void adviseAllMethods(MethodAdvice advice) 075 { 076 getBuilder().adviseAllMethods(advice); 077 } 078 079 public void adviseMethod(Method method, org.apache.tapestry5.plastic.MethodAdvice advice) 080 { 081 getBuilder().adviseMethod(method, advice); 082 } 083 084 public void adviseAllMethods(org.apache.tapestry5.plastic.MethodAdvice advice) 085 { 086 getBuilder().adviseAllMethods(advice); 087 } 088 089 public Class getInterface() 090 { 091 return serviceInterface; 092 } 093 094 public T build() 095 { 096 return builder == null ? delegate : builder.build(); 097 } 098 099 private AspectInterceptorBuilder<T> getBuilder() 100 { 101 if (builder == null) 102 builder = new AspectInterceptorBuilderImpl<T>(annotationAccess, proxyFactory, serviceInterface, 103 delegate, description); 104 105 return builder; 106 } 107 }; 108 } 109 }