1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
/*
* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.io.IOException;
import java.io.UncheckedIOException;
import java.net.URL;
import java.util.Collections;
import java.util.Enumeration;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;
/*
* @test
* @bug 8161230
* @summary Test java.lang.ClassLoader.resources() method
*
* @build ResourcesStreamTest
* @run main ResourcesStreamTest
*/
public class ResourcesStreamTest {
public static void main(String[] args) throws Exception {
testSuccess();
testFailure();
}
public static void testSuccess() throws Exception {
// failing part first
try {
ClassLoader cl = new FailingClassLoader();
// should create the stream pipe
Stream<URL> stream = cl.resources("the name");
// expect function to throw an exception when calling the method
stream.forEach(System.out::println);
throw new Exception("expected UncheckedIOException not thrown");
} catch (UncheckedIOException uio) {
String causeMessage = uio.getCause().getMessage();
if (!"the name".equals(causeMessage))
throw new Exception("unexpected cause message: " + causeMessage);
}
}
public static void testFailure() throws Exception {
ClassLoader cl = new SuccessClassLoader();
long count = cl.resources("the name").count();
if (count != 1)
throw new Exception("expected resource is null or empty");
cl.resources("the name")
.filter(url -> "file:/somefile".equals(url.toExternalForm()))
.findFirst()
.orElseThrow(() -> new Exception("correct URL not found"));
}
public static class SuccessClassLoader extends ClassLoader {
@Override
public Enumeration<URL> getResources(String name) throws IOException {
URL url = new URL("file:/somefile");
return Collections.enumeration(Collections.singleton(url));
}
}
public static class FailingClassLoader extends ClassLoader {
@Override
public Enumeration<URL> getResources(String name) throws IOException {
throw new IOException(name);
}
}
}
|
