1. /*

  2.  * Copyright 2002-2004 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

  24.  * Throwable. 

  25.  * @author Rod Johnson

  26.  * @version $Id: MethodBeforeAdvice.java,v 1.3 2004/03/18 02:46:07 trisberg Exp $

  27.  */

  28. public interface MethodBeforeAdvice extends BeforeAdvice {

  29. 	

  30. 	/**

  31. 	 * Callback before a given method is invoked

  32. 	 * @param m method being invoked

  33. 	 * @param args arguments to the method

  34. 	 * @param target target of the method invocation. May be null

  35. 	 * @throws Throwable if this object wishes to abort the

  36. 	 * call. Any exception thrown will be returned to the caller

  37. 	 * if it's allowed by the method signature. Otherwise

  38. 	 * the exception will be wrapped as a runtime exception. 

  39. 	 */

  40. 	void before(Method m, Object[] args, Object target) throws Throwable;

  41. 

  42. }