/*
* 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.HashMap;
import java.util.Map;
import de.petris.dynamicaspects.classhandler.CallClassHandler;
import de.petris.dynamicaspects.classhandler.ClassHandler;
/**
* This mapper maintains a mapping between a class and its
* {@link de.petris.dynamicaspects.classhandler.ClassHandler ClassHandler}
* <br>
* The mapper is queried during runtime for the
* {@link de.petris.dynamicaspects.wrapper.CallWrapper CallWrapper} containing the advices for
* a certain situation and during installation process by the
* {@link de.petris.dynamicaspects.WeaveType WeaveType.Call}
*
* @author Marco Petris
* @see de.petris.dynamicaspects.BeforeAfterAdvice
* @see de.petris.dynamicaspects.WeaveType
* @see de.petris.dynamicaspects.classhandler.ClassHandler
* @see de.petris.dynamicaspects.wrapper.CallWrapper
*/
public class CallMapper {
/*
* This method is called during runtime to get the wrapper for the
* method call.
*/
static String GETWRAPPER_METHODNAME = "getWrapper";
// a mapping: target class -> class handler
private static Map<String, CallClassHandler> callHandlers
= new HashMap<String, CallClassHandler>();
/**
* Returns the class handler for the given target class.
* This method is called by the {@link de.petris.dynamicaspects.WeaveType WeaveType.Call}.
*
* @param targetClassName the name of the target class
* @return the handler for the target class
*/
public static ClassHandler getClassHandler( String targetClassName ) {
if( callHandlers.containsKey( targetClassName ) ) {
return callHandlers.get( targetClassName );
}
else { // if there is no handler for this class we create a new one
CallClassHandler cHandler = new CallClassHandler();
callHandlers.put( targetClassName, cHandler );
return cHandler;
}
}
/**
* Called before the call of the target method to get the wrapper which
* is wrapping the target call.
* This method is not for normal programming use.
*
* @param targetClassName the name of the targetclass
* @param methodIdx the index of the method containing the target call
* @param joinpointPattern the pattern describing the target call
* @return the wrapper wrapping the target call
*/
public static CallWrapper getWrapper(
String targetClassName, int methodIdx, String joinpointPattern ) {
CallClassHandler cHandler
= callHandlers.get( targetClassName );
return cHandler.getCallWrapper( methodIdx, joinpointPattern );
}
}