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 */
23
24import java.io.IOException;
25import java.io.OutputStream;
26import java.nio.file.*;
27import java.util.Random;
28import java.util.jar.JarEntry;
29import java.util.jar.JarOutputStream;
30
31/**
32 * Utility class for zipfs tests.
33 */
34
35class Utils {
36    private Utils() { }
37
38    /**
39     * Creates a JAR file of the given name with 0 or more named entries.
40     *
41     * @return Path to the newly created JAR file
42     */
43    static Path createJarFile(String name, String... entries) throws IOException {
44        Path jarFile = Paths.get("basic.jar");
45        Random rand = new Random();
46        try (OutputStream out = Files.newOutputStream(jarFile);
47             JarOutputStream jout = new JarOutputStream(out)) {
48            int len = 100;
49            for (String entry: entries) {
50                JarEntry je = new JarEntry(entry);
51                jout.putNextEntry(je);
52                byte[] bytes = new byte[len];
53                rand.nextBytes(bytes);
54                jout.write(bytes);
55                jout.closeEntry();
56                len += 1024;
57            }
58        }
59        return jarFile;
60    }
61}
62