/*

 * 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.

 *

 */

/* @test

 * @bug 4313887 6838333

 * @summary Sanity test for Sun-specific FILE_TREE watch event modifier

 * @library ..

 */

import java.nio.file.*;

import static java.nio.file.StandardWatchEventKind.*;

import java.io.IOException;

import java.io.OutputStream;

import java.util.*;

import java.util.concurrent.*;

import static com.sun.nio.file.ExtendedWatchEventModifier.*;

public class FileTreeModifier {

    static void checkExpectedEvent(WatchService watcher,

                                   WatchEvent.Kind<?> expectedType,

                                   Object expectedContext)

    {

        WatchKey key;

        try {

            key = watcher.take();

        } catch (InterruptedException x) {

            // should not happen

            throw new RuntimeException(x);

        }

        WatchEvent<?> event = key.pollEvents().iterator().next();

        System.out.format("Event: type=%s, count=%d, context=%s\n",

            event.kind(), event.count(), event.context());

        if (event.kind() != expectedType)

            throw new RuntimeException("unexpected event");

        if (!expectedContext.equals(event.context()))

            throw new RuntimeException("unexpected context");

    }

    static void doTest(Path top) throws IOException {

        FileSystem fs = top.getFileSystem();

        WatchService watcher = fs.newWatchService();

        // create directories

        Path subdir = top

           .resolve("a").createDirectory()

           .resolve("b").createDirectory()

           .resolve("c").createDirectory();

        // Test ENTRY_CREATE with FILE_TREE modifier.

        WatchKey key = top.register(watcher,

            new WatchEvent.Kind<?>[]{ ENTRY_CREATE }, FILE_TREE);

        // create file in a/b/c and check we get create event

        Path file = subdir.resolve("foo").createFile();

        checkExpectedEvent(watcher, ENTRY_CREATE, top.relativize(file));

        key.reset();

        // Test ENTRY_DELETE with FILE_TREE modifier.

        WatchKey k = top.register(watcher,

            new WatchEvent.Kind<?>[]{ ENTRY_DELETE }, FILE_TREE);

        if (k != key)

            throw new RuntimeException("Existing key not returned");

        // delete a/b/c/foo and check we get delete event

        file.delete();

        checkExpectedEvent(watcher, ENTRY_DELETE, top.relativize(file));

        key.reset();

        // Test changing registration to ENTRY_CREATE without modifier

        k = top.register(watcher, new WatchEvent.Kind<?>[]{ ENTRY_CREATE });

        if (k != key)

            throw new RuntimeException("Existing key not returned");

        // create a/b/c/foo

        file.createFile();

        // check that key is not queued

        try {

            k = watcher.poll(3, TimeUnit.SECONDS);

        } catch (InterruptedException e) {

            throw new RuntimeException();

        }

        if (k != null)

            throw new RuntimeException("WatchKey not expected to be polled");

        // create bar and check we get create event

        file = top.resolve("bar").createFile();

        checkExpectedEvent(watcher, ENTRY_CREATE, top.relativize(file));

        key.reset();

        // Test changing registration to <all> with FILE_TREE modifier

        k = top.register(watcher,

            new WatchEvent.Kind<?>[]{ ENTRY_CREATE, ENTRY_DELETE, ENTRY_MODIFY },

            FILE_TREE);

        if (k != key)

            throw new RuntimeException("Existing key not returned");

        // modify bar and check we get modify event

        OutputStream out = file.newOutputStream();

        try {

            out.write("Double shot expresso please".getBytes("UTF-8"));

        } finally {

            out.close();

        }

        checkExpectedEvent(watcher, ENTRY_MODIFY, top.relativize(file));

        key.reset();

    }

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

        if (!System.getProperty("os.name").startsWith("Windows")) {

            System.out.println("This is Windows-only test at this time!");

            return;

        }

        Path dir = TestUtil.createTemporaryDirectory();

        try {

            doTest(dir);

        } finally {

            TestUtil.removeAll(dir);

        }

    }

}