BeanClassLoaderAware


1   /*
2    * Copyright 2002-2006 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.beans.factory;
18  
19  /**
20   * Callback that allows a bean to be aware of the bean
21   * {@link ClassLoader class loader}; that is, the class loader used by the
22   * present bean factory to load bean classes.
23   *
24   * <p>This is mainly intended to be implemented by framework classes which
25   * have to pick up application classes by name despite themselves potentially
26   * being loaded from a shared class loader.
27   *
28   * <p>For a list of all bean lifecycle methods, see the
29   * {@link BeanFactory BeanFactory javadocs}.
30   *
31   * @author Juergen Hoeller
32   * @since 2.0
33   * @see BeanNameAware
34   * @see BeanFactoryAware
35   * @see InitializingBean
36   */
37  public interface BeanClassLoaderAware {
38  
39      /**
40       * Callback that supplies the bean {@link ClassLoader class loader} to
41       * a bean instance.
42       * <p>Invoked <i>after</i> the population of normal bean properties but
43       * <i>before</i> an initialization callback such as
44       * {@link org.springframework.beans.factory.InitializingBean InitializingBean's}
45       * {@link org.springframework.beans.factory.InitializingBean#afterPropertiesSet()}
46       * method or a custom init-method.
47       * @param classLoader the owning class loader; may be <code>null</code> in
48       * which case a default <code>ClassLoader</code> must be used, for example
49       * the <code>ClassLoader</code> obtained via
50       * {@link org.springframework.util.ClassUtils#getDefaultClassLoader()}
51       */
52      void setBeanClassLoader(ClassLoader   classLoader);
53  
54  }
55
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