/*

 * Copyright (c) 2014, 2017, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package jdk.test.lib.classloader;

import java.util.function.Predicate;

/**

 * A classloader, which using target classloader in case provided condition

 * for class name is met, and using parent otherwise

 */

public class FilterClassLoader extends ClassLoader {

    private final ClassLoader target;

    private final Predicate<String> condition;

    public FilterClassLoader(ClassLoader target, ClassLoader parent,

            Predicate<String> condition) {

        super(parent);

        this.condition = condition;

        this.target = target;

    }

    @Override

    public Class<?> loadClass(String name) throws ClassNotFoundException {

        if (condition.test(name)) {

            return target.loadClass(name);

        }

        return super.loadClass(name);

    }

}