001// Copyright 2011 The Apache Software Foundation
002//
003// Licensed under the Apache License, Version 2.0 (the "License");
004// you may not use this file except in compliance with the License.
005// You may obtain a copy of the License at
006//
007// http://www.apache.org/licenses/LICENSE-2.0
008//
009// Unless required by applicable law or agreed to in writing, software
010// distributed under the License is distributed on an "AS IS" BASIS,
011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012// See the License for the specific language governing permissions and
013// limitations under the License.
014
015package org.apache.tapestry5.internal.plastic;
016
017/**
018 * Externalizes the logic for defining which classes will be loaded (and possibly transformed) by the class loader, and
019 * which will be loaded by the parent class loader.
020 */
021public interface ClassLoaderDelegate
022{
023    /**
024     * Identifies which classes are to be loaded.
025     * 
026     * @param className
027     *            fully qualified class name
028     * @return true if the class should be intercepted, false to let parent class loader load class
029     */
030    boolean shouldInterceptClassLoading(String className);
031
032    /**
033     * Load the class, transforming it as necessary.
034     * 
035     * @param className
036     *            binary class name
037     * @return loaded and (if not an inner class) transformed class
038     * @throws ClassNotFoundException
039     */
040    Class<?> loadAndTransformClass(String className) throws ClassNotFoundException;
041}