    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
    015    package org.apache.tapestry5.internal.plastic;
    016
    017    public 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    }