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/*
* Copyright (c) 2015, 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.lang.module.Configuration;
import java.lang.module.ResolvedModule;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
/**
* Basic test of Class getResource and getResourceAsStream to locate/read
* resources in named modules.
*/
public class Main {
static final String NAME = "myresource";
public static void main(String[] args) throws IOException {
// create resources in m1
createResource("m1", Paths.get("."), "m1");
createResource("m1", Paths.get("p1"), "m1/p1");
createResource("m1", Paths.get("p1", "impl"), "m1/p1.impl");
createResource("m1", Paths.get("p1", "resources"), "m1/p1.resources");
// create resources in m2
createResource("m2", Paths.get("."), "m2");
createResource("m2", Paths.get("p2"), "m2/p2");
createResource("m2", Paths.get("p2", "impl"), "m2/p2.impl");
createResource("m2", Paths.get("p2", "resources"), "m2/p2.resources");
// invoke Class getResource from an unnamed module.
URL url = Main.class.getResource("/" + NAME);
assertNotNull(url);
url = Main.class.getResource("/p1/" + NAME);
assertNull(url);
url = Main.class.getResource("/p1/impl/" + NAME);
assertNull(url);
url = Main.class.getResource("/p1/resources/" + NAME);
assertEquals(readAllAsString(url), "m1/p1.resources");
url = Main.class.getResource("/p2/" + NAME);
assertNull(url);
url = Main.class.getResource("/p2/impl/" + NAME);
assertNull(url);
// m1: exports private p1.resources
url = Main.class.getResource("/p2/resources/" + NAME);
assertNull(url);
// invoke Class getResource from module m1
url = p1.Main.getResource("/" + NAME);
assertEquals(readAllAsString(url), "m1");
url = p1.Main.getResource("/p1/" + NAME);
assertEquals(readAllAsString(url), "m1/p1");
url = p1.Main.getResource("/p1/impl/" + NAME);
assertEquals(readAllAsString(url), "m1/p1.impl");
url = p1.Main.getResource("/p1/resources/" + NAME);
assertEquals(readAllAsString(url), "m1/p1.resources");
// m2: not a named package
url = p1.Main.getResource(p2.Main.class, "/" + NAME);
assertEquals(readAllAsString(url), "m2");
url = p1.Main.getResource(p2.Main.class, "/p2/" + NAME);
assertNull(url);
// m2: exports p2.impl to m1
url = p1.Main.getResource(p2.Main.class, "/p2/impl/" + NAME);
assertNull(url);
// m2: exports private p2.resources to m1;
url = p1.Main.getResource(p2.Main.class, "/p2/resources/" + NAME);
assertEquals(readAllAsString(url), "m2/p2.resources");
// invoke Class getResource from module m2
url = p2.Main.getResource("/" + NAME);
assertEquals(readAllAsString(url), "m2");
url = p2.Main.getResource("/p2/" + NAME);
assertEquals(readAllAsString(url), "m2/p2");
url = p2.Main.getResource("/p2/impl/" + NAME);
assertEquals(readAllAsString(url), "m2/p2.impl");
url = p2.Main.getResource("/p2/resources/" + NAME);
assertEquals(readAllAsString(url), "m2/p2.resources");
// m1: not a named package
url = p2.Main.getResource(p1.Main.class, "/" + NAME);
assertEquals(readAllAsString(url), "m1");
url = p2.Main.getResource(p1.Main.class, "/p1/" + NAME);
assertNull(url);
url = p2.Main.getResource(p1.Main.class, "/p1/impl/" + NAME);
assertNull(url);
// m1: exports private p1.resources;
url = p2.Main.getResource(p1.Main.class, "/p1/resources/" + NAME);
assertEquals(readAllAsString(url), "m1/p1.resources");
// invoke Class getResourceAsStream from an unnamed module.
InputStream in = Main.class.getResourceAsStream("/" + NAME);
assertNotNull(in);
in = Main.class.getResourceAsStream("/p1/" + NAME);
assertNull(in);
in = Main.class.getResourceAsStream("/p1/impl/" + NAME);
assertNull(in);
in = Main.class.getResourceAsStream("/p1/resources/" + NAME);
assertEquals(readAllAsString(in), "m1/p1.resources");
in = Main.class.getResourceAsStream("/p2/" + NAME);
assertNull(in);
in = Main.class.getResourceAsStream("/p2/impl/" + NAME);
assertNull(in);
in = Main.class.getResourceAsStream("/p2/resources/" + NAME);
assertNull(in);
// invoke Class getResourceAsStream from module m1
in = p1.Main.getResourceAsStream("/" + NAME);
assertEquals(readAllAsString(in), "m1");
in = p1.Main.getResourceAsStream("/p1/" + NAME);
assertEquals(readAllAsString(in), "m1/p1");
in = p1.Main.getResourceAsStream("/p1/impl/" + NAME);
assertEquals(readAllAsString(in), "m1/p1.impl");
in = p1.Main.getResourceAsStream("/p1/resources/" + NAME);
assertEquals(readAllAsString(in), "m1/p1.resources");
in = p1.Main.getResourceAsStream(p2.Main.class, "/" + NAME);
assertEquals(readAllAsString(in), "m2");
in = p1.Main.getResourceAsStream(p2.Main.class, "/p2/" + NAME);
assertNull(in);
in = p1.Main.getResourceAsStream(p2.Main.class, "/p2/impl/" + NAME);
assertNull(in);
in = p1.Main.getResourceAsStream(p2.Main.class, "/p2/resources/" + NAME);
assertEquals(readAllAsString(in), "m2/p2.resources");
// invoke Class getResourceAsStream from module m2
in = p2.Main.getResourceAsStream("/" + NAME);
assertEquals(readAllAsString(in), "m2");
in = p2.Main.getResourceAsStream("/p2/" + NAME);
assertEquals(readAllAsString(in), "m2/p2");
in = p2.Main.getResourceAsStream("/p2/impl/" + NAME);
assertEquals(readAllAsString(in), "m2/p2.impl");
in = p2.Main.getResourceAsStream("/p2/resources/" + NAME);
assertEquals(readAllAsString(in), "m2/p2.resources");
in = p2.Main.getResourceAsStream(p1.Main.class, "/" + NAME);
assertEquals(readAllAsString(in), "m1");
in = p2.Main.getResourceAsStream(p1.Main.class, "/p1/" + NAME);
assertNull(in);
in = p2.Main.getResourceAsStream(p1.Main.class, "/p1/impl/" + NAME);
assertNull(in);
in = p2.Main.getResourceAsStream(p1.Main.class, "/p1/resources/" + NAME);
assertEquals(readAllAsString(in), "m1/p1.resources");
// Nulls
try {
Main.class.getResource(null);
assertTrue(false);
} catch (NullPointerException expected) { }
try {
Main.class.getResourceAsStream(null);
assertTrue(false);
} catch (NullPointerException expected) { }
try {
p1.Main.class.getResource(null);
assertTrue(false);
} catch (NullPointerException expected) { }
try {
p1.Main.class.getResourceAsStream(null);
assertTrue(false);
} catch (NullPointerException expected) { }
// SecurityManager case
System.setSecurityManager(new SecurityManager());
assertNull(Main.class.getResource("/" + NAME));
assertNull(p1.Main.getResource("/" + NAME));
assertNull(p2.Main.getResource("/" + NAME));
assertNull(Main.class.getResourceAsStream("/" + NAME));
assertNull(p1.Main.getResourceAsStream("/" + NAME));
assertNull(p2.Main.getResourceAsStream("/" + NAME));
System.out.println("Success!");
}
/**
* Create a resource in the sub-directory of the given exploded module
*/
static void createResource(String mn, Path subdir, String msg) throws IOException {
Path dir = directoryFor(mn).resolve(subdir);
Path file = dir.resolve(NAME);
Files.write(file, msg.getBytes("UTF-8"));
}
/**
* Returns the directory for the given module (by name).
*/
static Path directoryFor(String name) {
Configuration cf = ModuleLayer.boot().configuration();
ResolvedModule resolvedModule = cf.findModule(name).orElse(null);
if (resolvedModule == null)
throw new RuntimeException("not found: " + name);
Path dir = Paths.get(resolvedModule.reference().location().get());
if (!Files.isDirectory(dir))
throw new RuntimeException("not a directory: " + dir);
return dir;
}
static String readAllAsString(InputStream in) throws IOException {
if (in == null)
return null;
try (in) {
return new String(in.readAllBytes(), "UTF-8");
}
}
static String readAllAsString(URL url) throws IOException {
if (url == null)
return null;
InputStream in = url.openStream();
return readAllAsString(url.openStream());
}
static void assertTrue(boolean condition) {
if (!condition) throw new RuntimeException();
}
static void assertNull(Object o) {
assertTrue(o == null);
}
static void assertNotNull(Object o) {
assertTrue(o != null);
}
static void assertEquals(Object actual, Object expected) {
if (expected == null) {
assertNull(actual);
} else {
assertTrue(expected.equals(actual));
}
}
static void assertNotEquals(Object actual, Object expected) {
if (expected == null) {
assertNotNull(actual);
} else {
assertTrue(!expected.equals(actual));
}
}
}
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