93 lines
2.9 KiB
Java
93 lines
2.9 KiB
Java
/*
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* Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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//
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import java.io.*;
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import java.util.*;
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public class Basic {
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private static PrintStream out = System.err;
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private static <T> Set<T> setOf(Iterable<T> it) {
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Set<T> s = new HashSet<T>();
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for (T t : it)
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s.add(t);
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return s;
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}
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private static <T> void checkEquals(Set<T> s1, Set<T> s2, boolean eq) {
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if (s1.equals(s2) != eq)
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throw new RuntimeException(String.format("%b %s : %s",
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eq, s1, s2));
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}
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abstract static class TestLoader {
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String name;
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TestLoader(String name) { this.name = name; }
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abstract ServiceLoader<FooService> load();
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}
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static TestLoader tcclLoader = new TestLoader("Thread context class loader") {
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ServiceLoader<FooService> load() {
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return ServiceLoader.load(FooService.class);
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}
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};
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static TestLoader systemClLoader = new TestLoader("System class loader") {
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ServiceLoader<FooService> load() {
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return ServiceLoader.load(FooService.class, ClassLoader.getSystemClassLoader());
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}
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};
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static TestLoader nullClLoader = new TestLoader("null (defer to system class loader)") {
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ServiceLoader<FooService> load() {
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return ServiceLoader.load(FooService.class, null);
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}
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};
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public static void main(String[] args) {
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for (TestLoader tl : Arrays.asList(tcclLoader, systemClLoader, nullClLoader)) {
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test(tl);
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}
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}
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static void test(TestLoader tl) {
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ServiceLoader<FooService> sl = tl.load();
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out.format("%s: %s%n", tl.name, sl);
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// Providers are cached
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Set<FooService> ps = setOf(sl);
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checkEquals(ps, setOf(sl), true);
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// The cache can be flushed and reloaded
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sl.reload();
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checkEquals(ps, setOf(sl), false);
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}
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}
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