ScriptLoader.java revision 1177:8e86c58cbb00 
1/*
2 * Copyright (c) 2010, 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 jdk.nashorn.internal.runtime;
27
28import java.security.CodeSource;
29import java.util.Objects;
30
31/**
32 * Responsible for loading script generated classes.
33 *
34 */
35final class ScriptLoader extends NashornLoader {
36    private static final String NASHORN_PKG_PREFIX = "jdk.nashorn.internal.";
37
38    private final Context context;
39
40    /*package-private*/ Context getContext() {
41        return context;
42    }
43
44    /**
45     * Constructor.
46     */
47    ScriptLoader(final ClassLoader parent, final Context context) {
48        super(parent);
49        this.context = context;
50    }
51
52    @Override
53    protected Class<?> loadClass(final String name, final boolean resolve) throws ClassNotFoundException {
54        checkPackageAccess(name);
55        if (name.startsWith(NASHORN_PKG_PREFIX)) {
56            return context.getSharedLoader().loadClass(name);
57        }
58        return super.loadClass(name, resolve);
59    }
60
61    // package-private and private stuff below this point
62
63    /**
64     * Install a class for use by the Nashorn runtime
65     *
66     * @param name Binary name of class.
67     * @param data Class data bytes.
68     * @param cs CodeSource code source of the class bytes.
69     *
70     * @return Installed class.
71     */
72    synchronized Class<?> installClass(final String name, final byte[] data, final CodeSource cs) {
73        Objects.requireNonNull(cs);
74        return defineClass(name, data, 0, data.length, cs);
75    }
76}
77