SeparatedClassLoader.java

/*
 * JBoss, Home of Professional Open Source
 * Copyright 2012, Red Hat Middleware LLC, and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jboss.arquillian.warp.impl.client.separation;

import org.jboss.arquillian.warp.impl.utils.ClassLoaderUtils;

/**
 * ClassLoader which uses Bootstrap ClassLoader as a parent and thus it provides classpath separated from context classpath
 *
 * @author Lukas Fryc
 */
public class SeparatedClassLoader extends ClassLoader {

    private ClassLoader[] chain;

    public SeparatedClassLoader(ClassLoader... classLoaderChain) {
        super(ClassLoaderUtils.getBootstrapClassLoader());

        chain = new ClassLoader[classLoaderChain.length + 1];
        System.arraycopy(classLoaderChain, 0, chain, 0, classLoaderChain.length);
        chain[chain.length - 1] = super.getParent();
    }

    @Override
    public Class<?> loadClass(String name) throws ClassNotFoundException {
        for (ClassLoader classLoader : chain) {
            try {
                return classLoader.loadClass(name);
            } catch (ClassNotFoundException e) {
                // hide the exception
            }
        }
        throw new ClassNotFoundException("Class with name " + name + " wasnt found in any of the class loaders in chain");
    }
}