AspectJAutoProxyBeanDefinitionParser


1   /*
2    * Copyright 2002-2007 the original author or authors.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.springframework.aop.config;
18  
19  import org.w3c.dom.Element  ;
20  import org.w3c.dom.Node  ;
21  import org.w3c.dom.NodeList  ;
22  
23  import org.springframework.beans.factory.config.BeanDefinition;
24  import org.springframework.beans.factory.config.TypedStringValue;
25  import org.springframework.beans.factory.support.ManagedList;
26  import org.springframework.beans.factory.xml.BeanDefinitionParser;
27  import org.springframework.beans.factory.xml.ParserContext;
28  import org.springframework.core.Conventions;
29  import org.springframework.util.StringUtils;
30  
31  /**
32   * {@link BeanDefinitionParser} for the <code>aspectj-autoproxy</code> tag,
33   * enabling the automatic application of @AspectJ-style aspects found in
34   * the {@link org.springframework.beans.factory.BeanFactory}.
35   *
36   * @author Rob Harrop
37   * @author Juergen Hoeller
38   * @since 2.0
39   */
40  class AspectJAutoProxyBeanDefinitionParser implements BeanDefinitionParser {
41  
42      private static final String   PROXY_TARGET_ATTRIBUTE = "proxy-target-class";
43  
44      private static final String   PROXY_TARGET_CLASS = Conventions.attributeNameToPropertyName(PROXY_TARGET_ATTRIBUTE);
45  
46  
47      public BeanDefinition parse(Element   element, ParserContext parserContext) {
48          AopNamespaceUtils.registerAtAspectJAutoProxyCreatorIfNecessary(parserContext, element);
49          extendBeanDefinition(element, parserContext);
50          return null;
51      }
52  
53      private void extendBeanDefinition(Element   element, ParserContext parserContext) {
54          BeanDefinition beanDef =
55                  parserContext.getRegistry().getBeanDefinition(AopNamespaceUtils.AUTO_PROXY_CREATOR_BEAN_NAME);
56          String   proxyTargetClass = element.getAttribute(PROXY_TARGET_ATTRIBUTE);
57          if (StringUtils.hasText(proxyTargetClass)) {
58              beanDef.getPropertyValues().addPropertyValue(PROXY_TARGET_CLASS, proxyTargetClass);
59          }
60          if (element.hasChildNodes()) {
61              addIncludePatterns(element, parserContext, beanDef);
62          }
63      }
64  
65      private void addIncludePatterns(Element   element, ParserContext parserContext, BeanDefinition beanDef) {
66          ManagedList includePatterns = new ManagedList();
67          includePatterns.setSource(parserContext.extractSource(element));
68          NodeList   childNodes = element.getChildNodes();
69          for (int i = 0; i < childNodes.getLength(); i++) {
70              Node   node = childNodes.item(i);
71              if (node instanceof Element  ) {
72                  Element   includeElement = (Element  ) node;
73                  TypedStringValue valueHolder = new TypedStringValue(includeElement.getAttribute("name"));
74                  valueHolder.setSource(parserContext.extractSource(includeElement));
75                  includePatterns.add(valueHolder);
76              }
77          }
78          beanDef.getPropertyValues().addPropertyValue("includePatterns", includePatterns);
79      }
80  
81  }
82
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