/*

 * Copyright (c) 2001, 2003, 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

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 */

/* @test

   @bug 4434115 4802789

 * @summary Check for regressions in FileChannel.force

 */

import java.io.*;

import java.nio.*;

import java.nio.channels.*;

public class Force {

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

        writeAfterForce();

        forceReadableOnly();

    }

    // 4434115: FileChannel.write() fails when preceded by force() operation

    private static void writeAfterForce() throws Exception {

        byte[] srcData = new byte[20];

        File blah = File.createTempFile("blah", null);

        blah.deleteOnExit();

        FileOutputStream fis = new FileOutputStream(blah);

        FileChannel fc = fis.getChannel();

        fc.write(ByteBuffer.wrap(srcData));

        fc.force(false);

        fc.write(ByteBuffer.wrap(srcData));

        fc.close();

    }

    // 4802789: FileChannel.force(true) throws IOException (windows)

    private static void forceReadableOnly() throws Exception {

        File f = File.createTempFile("blah", null);

        f.deleteOnExit();

        FileInputStream fis = new FileInputStream(f);

        FileChannel fc = fis.getChannel();

        fc.force(true);

        fc.close();

        fis.close();

    }

}