/*

 * 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

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 */

/* @test

 * @bug 7007609 7009618

 * @summary Check that ZipFile objects are always collected

 */

import java.io.*;

import java.nio.*;

import java.util.Random;

import java.util.zip.*;

import java.util.concurrent.CountDownLatch;

import java.util.concurrent.TimeUnit;

public class FinalizeZipFile {

    private final static CountDownLatch finalizersDone = new CountDownLatch(3);

    private static class InstrumentedZipFile extends ZipFile {

        public InstrumentedZipFile(File f) throws Exception {

            super(f);

            System.out.printf("Using %s%n", f.getPath());

        }

        protected void finalize() throws IOException {

            System.out.printf("Killing %s%n", getName());

            super.finalize();

            finalizersDone.countDown();

        }

    }

    private static void makeGarbage() throws Throwable {

        final Random rnd = new Random();

        final String javaHome = System.getProperty("java.home");

        // Create some ZipFiles.

        // Find some .jar files in JDK's lib directory.

        final File lib = new File(javaHome, "lib");

        check(lib.isDirectory());

        final File[] jars = lib.listFiles(

            new FilenameFilter() {

                public boolean accept(File dir, String name) {

                    return name.endsWith(".jar");}});

        check(jars.length > 1);

        new InstrumentedZipFile(jars[rnd.nextInt(jars.length)]).close();

        new InstrumentedZipFile(jars[rnd.nextInt(jars.length)]).close();

        // Create a ZipFile and get an input stream from it

        ZipFile zf = new InstrumentedZipFile(jars[rnd.nextInt(jars.length)]);

        ZipEntry ze = zf.getEntry("META-INF/MANIFEST.MF");

        InputStream is = zf.getInputStream(ze);

    }

    public static void realMain(String[] args) throws Throwable {

        makeGarbage();

        System.gc();

        finalizersDone.await(5, TimeUnit.SECONDS);

        // Not all ZipFiles were collected?

        equal(finalizersDone.getCount(), 0L);

    }

    //--------------------- Infrastructure ---------------------------

    static volatile int passed = 0, failed = 0;

    static void pass() {passed++;}

    static void fail() {failed++; Thread.dumpStack();}

    static void fail(String msg) {System.out.println(msg); fail();}

    static void unexpected(Throwable t) {failed++; t.printStackTrace();}

    static void check(boolean cond) {if (cond) pass(); else fail();}

    static void equal(Object x, Object y) {

        if (x == null ? y == null : x.equals(y)) pass();

        else fail(x + " not equal to " + y);}

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

        try {realMain(args);} catch (Throwable t) {unexpected(t);}

        System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);

        if (failed > 0) throw new AssertionError("Some tests failed");}

}