1 /* |
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2 * Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 |
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24 // |
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25 |
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26 import java.io.*; |
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27 import java.util.*; |
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28 |
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29 |
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30 public class Basic { |
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31 |
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32 private static PrintStream out = System.err; |
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33 |
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34 private static <T> Set<T> setOf(Iterable<T> it) { |
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35 Set<T> s = new HashSet<T>(); |
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36 for (T t : it) |
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37 s.add(t); |
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38 return s; |
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39 } |
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40 |
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41 private static <T> void checkEquals(Set<T> s1, Set<T> s2, boolean eq) { |
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42 if (s1.equals(s2) != eq) |
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43 throw new RuntimeException(String.format("%b %s : %s", |
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44 eq, s1, s2)); |
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45 } |
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46 |
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47 abstract static class TestLoader { |
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48 String name; |
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49 |
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50 TestLoader(String name) { this.name = name; } |
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51 |
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52 abstract ServiceLoader<FooService> load(); |
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53 } |
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54 |
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55 static TestLoader tcclLoader = new TestLoader("Thread context class loader") { |
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56 ServiceLoader<FooService> load() { |
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57 return ServiceLoader.load(FooService.class); |
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58 } |
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59 }; |
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60 |
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61 static TestLoader systemClLoader = new TestLoader("System class loader") { |
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62 ServiceLoader<FooService> load() { |
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63 return ServiceLoader.load(FooService.class, ClassLoader.getSystemClassLoader()); |
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64 } |
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65 }; |
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66 |
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67 static TestLoader nullClLoader = new TestLoader("null (defer to system class loader)") { |
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68 ServiceLoader<FooService> load() { |
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69 return ServiceLoader.load(FooService.class, null); |
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70 } |
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71 }; |
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72 |
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73 public static void main(String[] args) { |
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74 for (TestLoader tl : Arrays.asList(tcclLoader, systemClLoader, nullClLoader)) { |
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75 test(tl); |
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76 } |
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77 } |
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78 |
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79 static void test(TestLoader tl) { |
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80 ServiceLoader<FooService> sl = tl.load(); |
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81 out.format("%s: %s%n", tl.name, sl); |
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82 |
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83 // Providers are cached |
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84 Set<FooService> ps = setOf(sl); |
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85 checkEquals(ps, setOf(sl), true); |
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86 |
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87 // The cache can be flushed and reloaded |
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88 sl.reload(); |
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89 checkEquals(ps, setOf(sl), false); |
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90 |
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91 } |
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92 } |
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