/*

 * Copyright (c) 2001, 2017, 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.

 */

/*

 * @test

 * @bug 4421190

 * @summary Tests that Image I/O statics may be referenced properly from

 *          multiple AppContexts, as would be the case for multiple Applets in a

 *          single VM. Each AppContext should get its own copy of the registry

 *          and the caching parameters in the ImageIO class.

 * @modules java.desktop/sun.awt

 */

import java.io.File;

import java.io.IOException;

import javax.imageio.ImageIO;

import javax.imageio.spi.IIORegistry;

import sun.awt.SunToolkit;

class TestThread extends Thread {

    IIORegistry registry;

    boolean useCache;

    File cacheDirectory;

    boolean cacheSettingsOK = false;

    String threadName;

    boolean gotCrosstalk = false;

    public TestThread(ThreadGroup tg,

                      boolean useCache, File cacheDirectory,

                      String threadName) {

        super(tg, threadName);

        this.useCache = useCache;

        this.cacheDirectory = cacheDirectory;

        this.threadName = threadName;

    }

    public void run() {

//          System.out.println("Thread " + threadName + " in thread group " +

//                             getThreadGroup().getName());

        // Create a new AppContext as though we were an applet

        SunToolkit.createNewAppContext();

        // Get default registry and store reference

        this.registry = IIORegistry.getDefaultInstance();

        for (int i = 0; i < 10; i++) {

//              System.out.println(threadName +

//                                 ": setting cache parameters to " +

//                                 useCache + ", " + cacheDirectory);

            ImageIO.setUseCache(useCache);

            ImageIO.setCacheDirectory(cacheDirectory);

            try {

                sleep(1000L);

            } catch (InterruptedException e) {

            }

//              System.out.println(threadName + ": reading cache parameters");

            boolean newUseCache = ImageIO.getUseCache();

            File newCacheDirectory = ImageIO.getCacheDirectory();

            if (newUseCache != useCache ||

                newCacheDirectory != cacheDirectory) {

//                  System.out.println(threadName + ": got " +

//                                     newUseCache + ", " +

//                                     newCacheDirectory);

//                  System.out.println(threadName + ": crosstalk encountered!");

                gotCrosstalk = true;

            }

        }

    }

    public IIORegistry getRegistry() {

        return registry;

    }

    public boolean gotCrosstalk() {

        return gotCrosstalk;

    }

}

public class AppContextTest {

    public AppContextTest() {

        ThreadGroup tg0 = new ThreadGroup("ThreadGroup0");

        ThreadGroup tg1 = new ThreadGroup("ThreadGroup1");

        TestThread t0 =

            new TestThread(tg0, false, null, "TestThread 0");

        TestThread t1 =

            new TestThread(tg1, true, new File("."), "TestThread 1");

        t0.start();

        t1.start();

        try {

            t0.join();

        } catch (InterruptedException ie0) {

        }

        try {

            t1.join();

        } catch (InterruptedException ie1) {

        }

        if (t0.gotCrosstalk() || t1.gotCrosstalk()) {

            throw new RuntimeException("ImageIO methods had crosstalk!");

        }

        if (t0.getRegistry() == t1.getRegistry()) {

            throw new RuntimeException("ThreadGroups had same IIORegistry!");

        }

    }

    public static void main(String[] args) throws IOException {

        new AppContextTest();

    }

}