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 }