MethodBeforeAdvice


1   /*
2    * Copyright 2002-2005 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 java.lang.reflect.Method  ;
20  
21  /**
22   * Advice invoked before a method is invoked. Such advices cannot
23   * prevent the method call proceeding, unless they throw a Throwable.
24   *
25   * @see AfterReturningAdvice
26   * @see ThrowsAdvice
27   *
28   * @author Rod Johnson
29   */
30  public interface MethodBeforeAdvice extends BeforeAdvice {
31      
32      /**
33       * Callback before a given method is invoked.
34       * @param method method being invoked
35       * @param args arguments to the method
36       * @param target target of the method invocation. May be <code>null</code>.
37       * @throws Throwable if this object wishes to abort the call.
38       * Any exception thrown will be returned to the caller if it's
39       * allowed by the method signature. Otherwise the exception
40       * will be wrapped as a runtime exception.
41       */
42      void before(Method   method, Object  [] args, Object   target) throws Throwable  ;
43  
44  }
45

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