    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
    017public class PlasticClassLoader extends ClassLoader
    018{
    019    private final ClassLoaderDelegate delegate;
    020
    021    public PlasticClassLoader(ClassLoader parent, ClassLoaderDelegate delegate)
    022    {
    023        super(parent);
    024
    025        this.delegate = delegate;
    026    }
    027
    028    @Override
    029    protected synchronized Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException
    030    {
    031        Class<?> loadedClass = findLoadedClass(name);
    032
    033        if (loadedClass != null)
    034            return loadedClass;
    035
    036        if (delegate.shouldInterceptClassLoading(name))
    037        {
    038            Class<?> c = delegate.loadAndTransformClass(name);
    039
    040            if (resolve)
    041                resolveClass(c);
    042
    043            return c;
    044        } else
    045        {
    046            return super.loadClass(name, resolve);
    047        }
    048    }
    049
    050    public synchronized Class<?> defineClassWithBytecode(String className, byte[] bytecode)
    051    {
    052        return defineClass(className, bytecode, 0, bytecode.length);
    053    }
    054}