DynamicIntroductionAdvice


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;
18  
19  import org.aopalliance.aop.Advice;
20  
21  /** 
22   * Subinterface of AOP Alliance Advice that allows additional interfaces
23   * to be implemented by an Advice, and available via a proxy using that
24   * interceptor. This is a fundamental AOP concept called <b>introduction</b>.
25   *
26   * <p>Introductions are often <b>mixins</b>, enabling the building of composite
27   * objects that can achieve many of the goals of multiple inheritance in Java.
28   *
29   * <p>Compared to {qlink IntroductionInfo}, this interface allows an advice to
30   * implement a range of interfaces that is not necessarily known in advance.
31   * Thus an {@link IntroductionAdvisor} can be used to specify which interfaces
32   * will be exposed in an advised object.
33   *
34   * @author Rod Johnson
35   * @since 1.1.1
36   * @see IntroductionInfo
37   * @see IntroductionAdvisor
38   */
39  public interface DynamicIntroductionAdvice extends Advice {
40      
41      /**
42       * Does this introduction advice implement the given interface?
43       * @param intf the interface to check
44       * @return whether the advice implements the specified interface
45       */
46      boolean implementsInterface(Class   intf);
47  
48  }
49
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Popular Tags