Package de.petris.dynamicaspects.wrapper

Source Code of de.petris.dynamicaspects.wrapper.ExecutionWrapper

/*
* Copyright (c) 2004, Marco Petris
* All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*     - Redistributions of source code must retain the above copyright notice,
*       this list of conditions and the following disclaimer.
*     - Redistributions in binary form must reproduce the above copyright
*       notice, this list of conditions and the following disclaimer in the
*       documentation and/or other materials provided with the distribution.
*     - Neither the name of Marco Petris nor the names of its
*       contributors may be used to endorse or promote products derived from
*       this software without specific prior written permission.
*      
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/

package de.petris.dynamicaspects.wrapper;

import java.util.Iterator;

import de.petris.dynamicaspects.ArgumentInfo;
import de.petris.dynamicaspects.BeforeAfterAdvice;
import de.petris.dynamicaspects.ReturnInfo;


/**
* This class handles {@link de.petris.dynamicaspects.BeforeAfterAdvice BeforeAfterAdvice}s,
* installed with the  {@link de.petris.dynamicaspects.WeaveType WeaveType.EXECUTION}.
* During method execution the {@link ExecutionMapper ExecutionMapper}
* loads the wrapper for the method and leaves the aspect handling to 
* this wrapper. 
*
* @author Marco Petris
* @see de.petris.dynamicaspects.BeforeAfterAdvice
* @see de.petris.dynamicaspects.WeaveType
* @see ExecutionMapper
*/
public class ExecutionWrapper extends Wrapper {
 
  private String className;
  private String methodSignature;
  private String methodName;
  private boolean methodIsStatic;
 
  /**
     * Creates an instance of this class.
     *
   * @param className the name of the target class
   * @param methodName the name of the target method
   * @param methodSignature the signature of the target method
   * @param methodIsStatic flag indicates if the target method is static ( true )
   */
  public ExecutionWrapper(
      String className, String methodName, String methodSignature,
      boolean methodIsStatic ) {
    this.className = className;
    this.methodName = methodName;
    this.methodSignature = methodSignature;
    this.methodIsStatic = methodIsStatic;
  }
 
  /* (non-Javadoc)
   * @see de.petris.dynamicaspects.wrapper.Wrapper#after(java.lang.Object, boolean, boolean)
   */
  protected void after(
      Object returnValue, boolean isException, boolean returnsVoid ) {
   
    ReturnInfo returnInfo
      = new ReturnInfo(
          returnValue, isException,
          returnsVoid );
   
    Iterator<BeforeAfterAdvice> iter =
      advices.iterator();
   
    while( iter.hasNext() ) {
      iter.next().after( returnInfo );
    }
  }
 
  /* (non-Javadoc)
   * @see de.petris.dynamicaspects.wrapper.Wrapper#before(de.petris.dynamicaspects.ArgumentInfo)
   */
  public void before( ArgumentInfo methodInfo ) {
   
    if( methodIsStatic ) {
      methodInfo.setStaticTarget( className );
    }
   
    methodInfo.setMethodNameSignature(
        methodName, methodSignature );
   
    Iterator<BeforeAfterAdvice> iter =
      advices.iterator();
   
    while( iter.hasNext() ) {
      iter.next().before( methodInfo );
    }
  }
}
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