01: /*
02: * Copyright 2002-2007 the original author or authors.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
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 implements Interface(Class intf);
47:
48: }
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