ModulesTest.java 文件源码

/**
 * Basic test ServiceLoader.load specifying the platform class loader.
 * The providers on the module path and class path should not be located.
 */
@Test
public void testWithPlatformClassLoader() {
    ClassLoader pcl = ClassLoader.getPlatformClassLoader();

    // iterator
    ServiceLoader<ScriptEngineFactory> loader
        = ServiceLoader.load(ScriptEngineFactory.class, pcl);
    Set<String> names = collectAll(loader)
            .stream()
            .map(ScriptEngineFactory::getEngineName)
            .collect(Collectors.toSet());
    assertFalse(names.contains("BananaScriptEngine"));
    assertFalse(names.contains("PearScriptEngine"));

    // stream
    names = ServiceLoader.load(ScriptEngineFactory.class, pcl)
            .stream()
            .map(Provider::get)
            .map(ScriptEngineFactory::getEngineName)
            .collect(Collectors.toSet());
    assertFalse(names.contains("BananaScriptEngine"));
    assertFalse(names.contains("PearScriptEngine"));
}