Loader.java revision 13901:b2a69d66dc65 
1/*
2 * Copyright (c) 1998, 2010, 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 */
23
24/*
25 * This test runs in othervm mode as it tests ClassLoader.findSystemClass
26 * and getSystemResource methods.
27 */
28
29/* @test
30   @bug 4147599 4478150
31   @summary In 1.2beta4-I ClassLoader loaded classes can not link
32            against application classes.
33   @run main/othervm Loader
34*/
35
36/*
37 * We are trying to test that certain methods of ClassLoader look at the same
38 * paths as they did in 1.1.  To run this test on 1.1, you will have to pass
39 * "-1.1" as option on the command line.
40 *
41 * The required files are:
42 *
43 *      - Loader.java            (a 1.1 style class loader)
44 *      - Loadee.java            (source for a class that refers to Loader)
45 *      - Loadee.classfile       (to test findSystemClass)
46 *      - Loadee.resource        (to test getSystemResource)
47 *
48 * The extension ".classfile" is so the class file is not seen by any loader
49 * other than Loader.  If you need to make any changes you will have to
50 * compile Loadee.java and rename Loadee.class to Loadee.classfile.
51 */
52
53import java.io.File;
54import java.io.DataInputStream;
55import java.io.FileInputStream;
56import java.io.IOException;
57import java.net.URL;
58import java.util.HashSet;
59
60
61/**
62 * A 1.1-style ClassLoader.  The only class it can really load is "Loadee".
63 * For other classes it might be asked to load, it relies on loaders set up by
64 * the launcher.
65 */
66public class Loader extends ClassLoader {
67
68    public Class loadClass(String name, boolean resolve)
69        throws ClassNotFoundException {
70        Class c = null;
71        try {
72            c = findSystemClass(name);
73        } catch (ClassNotFoundException cnfe) {
74        }
75        if (c == null) {
76            if (!name.equals("Loadee"))
77                throw new Error("java.lang.ClassLoader.findSystemClass() " +
78                                "did not find class " + name);
79            byte[] b = locateBytes();
80            c = defineClass(name, b, 0, b.length);
81        }
82        if (resolve) {
83            resolveClass(c);
84        }
85        return c;
86    }
87
88    private byte[] locateBytes() {
89        try {
90            File f   = new File(System.getProperty("test.src", "."),
91                                "Loadee.classfile");
92            long l   = f.length();
93            byte[] b = new byte[(int)l];
94            DataInputStream in =
95                new DataInputStream(new FileInputStream(f));
96            in.readFully(b);
97            return b;
98        } catch (IOException ioe) {
99            ioe.printStackTrace();
100            throw new Error("Test failed due to IOException!");
101        }
102    }
103
104    private static final int FIND      = 0x1;
105    private static final int RESOURCE  = 0x2;
106    private static final int RESOURCES = 0x4;
107
108    public static void main(String[] args) throws Exception {
109        int tests = FIND | RESOURCE | RESOURCES;
110
111        if (args.length == 1 && args[0].equals("-1.1")) {
112            tests &= ~RESOURCES; /* Do not run getResources test. */
113        }
114
115        if ((tests & FIND) == FIND) {
116            report("findSystemClass()");
117            ClassLoader l = new Loader();
118            Class       c = l.loadClass("Loadee");
119            Object      o = c.newInstance();
120        }
121
122        if ((tests & RESOURCE) == RESOURCE) {
123            report("getSystemResource()");
124            URL u = getSystemResource("Loadee.resource");
125            if (u == null)
126                throw new Exception
127                    ("java.lang.ClassLoader.getSystemResource() test failed!");
128        }
129    }
130
131    private static void report(String s) {
132        System.out.println("Testing java.lang.ClassLoader." + s + " ...");
133    }
134}
135