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Java > Open Source Codes > org > springframework > aop > framework > autoproxy > AutoProxyUtils


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.framework.autoproxy;
18
19 import org.springframework.beans.factory.config.BeanDefinition;
20 import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
21 import org.springframework.core.Conventions;
22
23 /**
24  * Utilities for auto-proxy aware components.
25  * Mainly for internal use within the framework.
26  *
27  * @author Juergen Hoeller
28  * @since 2.0.3
29  * @see AbstractAutoProxyCreator
30  */
31 public abstract class AutoProxyUtils {
32
33     /**
34      * Bean definition attribute that may indicate whether a given bean is supposed
35      * to be proxied with its target class (in case of it getting proxied in the first
36      * place). The value is <code>Boolean.TRUE</code> or <code>Boolean.FALSE</code>.
37      * <p>Proxy factories can set this attribute if they built a target class proxy
38      * for a specific bean, and want to enforce that that bean can always be cast
39      * to its target class (even if AOP advices get applied through auto-proxying).
40      */
41     public static final String JavaDoc PRESERVE_TARGET_CLASS_ATTRIBUTE =
42             Conventions.getQualifiedAttributeName(AutoProxyUtils.class, "preserveTargetClass");
43
44
45     /**
46      * Determine whether the given bean should be proxied with its target
47      * class rather than its interfaces. Checks the
48      * {@link #PRESERVE_TARGET_CLASS_ATTRIBUTE "preserveTargetClass" attribute}
49      * of the corresponding bean definition.
50      * @param beanFactory the containing ConfigurableListableBeanFactory
51      * @param beanName the name of the bean
52      * @return whether the given bean should be proxied with its target class
53      */
54     public static boolean shouldProxyTargetClass(ConfigurableListableBeanFactory beanFactory, String JavaDoc beanName) {
55         if (beanFactory.containsBeanDefinition(beanName)) {
56             BeanDefinition bd = beanFactory.getBeanDefinition(beanName);
57             return Boolean.TRUE.equals(bd.getAttribute(PRESERVE_TARGET_CLASS_ATTRIBUTE));
58         }
59         return false;
60     }
61
62 }
63
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