1 /*
2  * Copyright (c) 2005, 2006, 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 
26 import java.io.*;
27 import java.util.*;
28 
29 
30 public class Load {
31 
32     private static PrintStream out = System.err;
33 
main(String[] args)34     public static void main(String[] args) throws Exception {
35 
36         boolean installedOnly = false;
37 
38         List<String> expected = new ArrayList<String>(Arrays.asList(args));
39         if (!expected.isEmpty() && expected.get(0).equals("-i")) {
40             expected.remove(0);
41             installedOnly = true;
42         }
43         if (expected.isEmpty())
44             throw new Exception("usage: Load [-i] ( fail | provider-class-name )*");
45 
46         ServiceLoader<FooService> sl = (installedOnly
47                                         ? ServiceLoader.loadInstalled(FooService.class)
48                                         : ServiceLoader.load(FooService.class));
49         out.format("%s%n", sl);
50         Iterator<FooService> sli = sl.iterator();
51         Iterator<String> ei = expected.iterator();
52 
53         for (;; ei.remove()) {
54             FooService fp = null;
55             try {
56                 if (!sli.hasNext())
57                     break;
58                 fp = sli.next();
59             } catch (ServiceConfigurationError x) {
60                 if (ei.next().equals("fail")) {
61                     out.format("Failed as expected: %s%n", x);
62                     continue;
63                 }
64                 throw x;
65             }
66             String ec = ei.next();
67             if (!fp.getClass().getName().equals(ec))
68                 throw new
69                     Exception(String.format("Wrong provider %s; expected %s",
70                                             fp.getClass().getName(), ec));
71             out.format("Provider found: %s%n", fp.getClass().getName());
72         }
73 
74         if (ei.hasNext())
75             throw new Exception("Missing providers: " + expected);
76 
77     }
78 
79 }
80