1/*
2 * Copyright (c) 1997, 2013, 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.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package com.sun.istack.internal.tools;
27
28import java.util.Collection;
29
30/**
31 * {@link ClassLoader} that masks a specified set of classes
32 * from its parent class loader.
33 *
34 * <p>
35 * This code is used to create an isolated environment.
36 *
37 * @author Kohsuke Kawaguchi
38 */
39public class MaskingClassLoader extends ClassLoader {
40
41    private final String[] masks;
42
43    public MaskingClassLoader(String... masks) {
44        this.masks = masks;
45    }
46
47    public MaskingClassLoader(Collection<String> masks) {
48        this(masks.toArray(new String[masks.size()]));
49    }
50
51    public MaskingClassLoader(ClassLoader parent, String... masks) {
52        super(parent);
53        this.masks = masks;
54    }
55
56    public MaskingClassLoader(ClassLoader parent, Collection<String> masks) {
57        this(parent, masks.toArray(new String[masks.size()]));
58    }
59
60    @Override
61    protected synchronized Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
62        for (String mask : masks) {
63            if(name.startsWith(mask))
64                throw new ClassNotFoundException();
65        }
66
67        return super.loadClass(name, resolve);
68    }
69}
70