Utils.java revision 1870:4aa2e64eff30 
1/*
2 * Copyright (c) 2015, 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
24package jdk.test.failurehandler;
25
26import java.io.IOException;
27import java.io.InputStream;
28import java.io.OutputStream;
29import java.io.Reader;
30import java.io.Writer;
31import java.util.Properties;
32
33public final class Utils {
34    private static final int BUFFER_LENGTH = 1024;
35
36    public static String prependPrefix(String prefix, String name) {
37        return  (prefix == null || prefix.isEmpty())
38                ? name
39                : (name == null || name.isEmpty())
40                  ? prefix
41                  : String.format("%s.%s", prefix, name);
42    }
43
44    public static void copyStream(InputStream in, OutputStream out)
45            throws IOException {
46        int n;
47        byte[] buffer = new byte[BUFFER_LENGTH];
48        while ((n = in.read(buffer)) != -1) {
49            out.write(buffer, 0, n);
50        }
51        out.flush();
52    }
53
54    public static void copyStream(Reader in, Writer out)
55            throws IOException {
56        int n;
57        char[] buffer = new char[BUFFER_LENGTH];
58        while ((n = in.read(buffer)) != -1) {
59            out.write(buffer, 0, n);
60        }
61        out.flush();
62    }
63
64    public static Properties getProperties(String name) {
65        Properties properties = new Properties();
66        String resourceName = String.format(
67                "/%s.%s", name.toLowerCase(), "properties");
68        InputStream stream = Utils.class.getResourceAsStream(resourceName);
69        if (stream == null) {
70            throw new IllegalStateException(String.format(
71                    "resource '%s' doesn't exist%n", resourceName));
72        }
73        try {
74            try {
75                properties.load(stream);
76            } finally {
77                stream.close();
78            }
79        } catch (IOException e) {
80            throw new IllegalStateException(String.format(
81                    "can't read resource '%s' : %s%n",
82                    resourceName, e.getMessage()), e);
83        }
84        return properties;
85    }
86
87    private Utils() { }
88}
89