test/lib/jdk/test/lib/classloader/ParentLastURLClassLoader.java
author iignatyev
Thu, 18 May 2017 10:22:19 -0700
changeset 45160 ec88d39f0eb1
permissions -rw-r--r--
8180395: move FilterClassLoader and ParentLastURLClassLoader to top level testlibrary Reviewed-by: psandoz

/*
 * 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.net.URL;
import java.net.URLClassLoader;

/**
 * An url classloader, which trying to load class from provided URL[] first,
 * and using parent classloader in case it failed
 */
public class ParentLastURLClassLoader extends URLClassLoader {

    public ParentLastURLClassLoader(URL urls[], ClassLoader parent) {
        super(urls, parent);
    }

    @Override
    public Class<?> loadClass(String name) throws ClassNotFoundException {
        try {
            Class<?> c = findClass(name);
            if (c != null) {
                return c;
            }
        } catch (ClassNotFoundException e) {
            // ignore
        }
        return super.loadClass(name);
    }
}