/*

 * 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.ModuleFinder;

import java.lang.reflect.InvocationHandler;

import java.lang.reflect.Layer;

import java.lang.reflect.Proxy;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.util.Arrays;

import static jdk.testlibrary.ProcessTools.executeTestJava;

import org.testng.annotations.BeforeTest;

import org.testng.annotations.Test;

import static org.testng.Assert.*;

/**

 * @test

 * @library /lib/testlibrary

 * @modules jdk.compiler

 * @build ProxyTest CompilerUtils jdk.testlibrary.ProcessTools

 * @run testng ProxyLayerTest

 * @summary Test proxies to implement interfaces in a layer

 */

public class ProxyLayerTest {

    private static final String TEST_SRC = System.getProperty("test.src");

    private static final String TEST_CLASSES = System.getProperty("test.classes");

    private static final Path SRC_DIR = Paths.get(TEST_SRC, "src");

    private static final Path MODS_DIR = Paths.get("mods");

    private static final Path CPATH_DIR = Paths.get(TEST_CLASSES);

    // the names of the modules in this test

    private static String[] modules = new String[] {"m1", "m2", "m3"};

    /**

     * Compiles all modules used by the test

     */

    @BeforeTest

    public void compileAll() throws Exception {

        for (String mn : modules) {

            Path msrc = SRC_DIR.resolve(mn);

            assertTrue(CompilerUtils.compile(msrc, MODS_DIR, "-modulesourcepath", SRC_DIR.toString()));

        }

    }

    /**

     * Test proxy implementing interfaces in a Layer defined in

     * an unnamed module

     */

    @Test

    public void testProxyInUnnamed() throws Exception {

        ModuleFinder finder = ModuleFinder.of(MODS_DIR);

        Layer bootLayer = Layer.boot();

        Configuration cf = bootLayer

                .configuration()

                .resolveRequiresAndUses(ModuleFinder.empty(), finder, Arrays.asList(modules));

        ClassLoader scl = ClassLoader.getSystemClassLoader();

        Layer layer = bootLayer.defineModulesWithOneLoader(cf, scl);

        ClassLoader loader = layer.findLoader("m1");

        assertTrue(layer.findModule("m1").isPresent());

        assertTrue(layer.findModule("m2").isPresent());

        assertTrue(layer.findModule("m3").isPresent());

        Class<?>[] interfaces = new Class<?>[] {

            Class.forName("p.one.I", false, loader),

            Class.forName("p.two.A", false, loader),

            Class.forName("p.three.P", false, loader),

        };

        Object o = Proxy.newProxyInstance(loader, interfaces, handler);

        Class<?> proxyClass = o.getClass();

        Package pkg = proxyClass.getPackage();

        assertFalse(proxyClass.getModule().isNamed());

        assertFalse(pkg.isSealed());

        assertEquals(proxyClass.getModule().getLayer(), null);

    }

    /**

     * Test proxy implementing interfaces in a Layer and defined in a

     * dynamic module

     */

    @Test

    public void testProxyInDynamicModule() throws Exception {

        ModuleFinder finder = ModuleFinder.of(MODS_DIR);

        Layer bootLayer = Layer.boot();

        Configuration cf = bootLayer

                .configuration()

                .resolveRequiresAndUses(ModuleFinder.empty(), finder, Arrays.asList(modules));

        ClassLoader scl = ClassLoader.getSystemClassLoader();

        Layer layer = bootLayer.defineModulesWithOneLoader(cf, scl);

        ClassLoader loader = layer.findLoader("m1");

        assertTrue(layer.findModule("m1").isPresent());

        assertTrue(layer.findModule("m2").isPresent());

        assertTrue(layer.findModule("m3").isPresent());

        Class<?>[] interfaces = new Class<?>[] {

            Class.forName("p.one.internal.J", false, loader),

        };

        Object o = Proxy.newProxyInstance(loader, interfaces, handler);

        Class<?> proxyClass = o.getClass();

        Package pkg = proxyClass.getPackage();

        assertTrue(proxyClass.getModule().isNamed());

        assertTrue(pkg.isSealed());

        assertEquals(proxyClass.getModule().getLayer(), null);

    }

    /**

     * Test proxy implementing interfaces that the target module has no access

     */

    @Test

    public void testNoReadAccess() throws Exception {

        ModuleFinder finder = ModuleFinder.of(MODS_DIR);

        Layer bootLayer = Layer.boot();

        Configuration cf = bootLayer

                .configuration()

                .resolveRequiresAndUses(ModuleFinder.empty(), finder, Arrays.asList(modules));

        ClassLoader scl = ClassLoader.getSystemClassLoader();

        Layer layer = bootLayer.defineModulesWithOneLoader(cf, scl);

        ClassLoader loader = layer.findLoader("m1");

        assertTrue(layer.findModule("m1").isPresent());

        assertTrue(layer.findModule("m2").isPresent());

        assertTrue(layer.findModule("m3").isPresent());

        Class<?>[] interfaces = new Class<?>[] {

                Class.forName("p.one.I", false, loader),

                Class.forName("p.two.B", false, loader)   // non-public interface but exported package

        };

        checkIAE(loader, interfaces);

    }

    private void checkIAE(ClassLoader loader, Class<?>[] interfaces) {

        try {

            Proxy.getProxyClass(loader, interfaces);

            throw new RuntimeException("Expected IllegalArgumentException thrown");

        } catch (IllegalArgumentException e) {}

        try {

            Proxy.newProxyInstance(loader, interfaces, handler);

            throw new RuntimeException("Expected IllegalArgumentException thrown");

        } catch (IllegalArgumentException e) {}

    }

    private final static InvocationHandler handler =

            (proxy, m, params) -> { throw new RuntimeException(m.toString()); };

}