1/*
2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23package jdk.testlibrary;
24
25import java.util.function.Predicate;
26/**
27 * A classloader, which using target classloader in case provided condition
28 * for class name is met, and using parent otherwise
29 */
30public class FilterClassLoader extends ClassLoader {
31
32    private final ClassLoader target;
33    private final Predicate<String> condition;
34
35    public FilterClassLoader(ClassLoader target, ClassLoader parent,
36            Predicate<String> condition) {
37        super(parent);
38        this.condition = condition;
39        this.target = target;
40    }
41
42    @Override
43    public Class<?> loadClass(String name) throws ClassNotFoundException {
44        if (condition.test(name)) {
45            return target.loadClass(name);
46        }
47        return super.loadClass(name);
48    }
49}
50