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/*
* Copyright (c) 2014, 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 8025619
* @summary Verify that a channel obtained from a closed stream is truly closed.
*/
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.channels.ClosedChannelException;
import java.nio.channels.FileChannel;
public class GetClosedChannel {
private static final int NUM_CHANNELS = 3;
private static final int NUM_EXCEPTIONS = 2*NUM_CHANNELS;
public static void main(String[] args) throws IOException {
int exceptions = 0;
int openChannels = 0;
for (int i = 0; i < NUM_CHANNELS; i++) {
File f = File.createTempFile("fcbug", ".tmp");
f.deleteOnExit();
FileChannel fc = null;
boolean shared = false;
switch (i) {
case 0:
System.out.print("FileInputStream...");
FileInputStream fis = new FileInputStream(f);
fis.close();
fc = fis.getChannel();
if (fc.isOpen()) {
System.err.println("FileInputStream channel should not be open");
openChannels++;
}
shared = true;
break;
case 1:
System.out.print("FileOutputStream...");
FileOutputStream fos = new FileOutputStream(f);
fos.close();
fc = fos.getChannel();
if (fc.isOpen()) {
System.err.println("FileOutputStream channel should not be open");
openChannels++;
}
break;
case 2:
System.out.print("RandomAccessFile...");
RandomAccessFile raf = new RandomAccessFile(f, "rw");
raf.close();
fc = raf.getChannel();
if (fc.isOpen()) {
System.err.println("RandomAccessFile channel should not be open");
openChannels++;
}
break;
default:
assert false : "Should not get here";
}
try {
long position = fc.position();
System.err.println("Channel "+i+" position is "+position);
} catch (ClosedChannelException cce) {
exceptions++;
}
try {
fc.tryLock(0, Long.MAX_VALUE, shared);
} catch (ClosedChannelException e) {
System.out.println("OK");
exceptions++;
} catch (Error err) {
System.err.println(err);
}
}
if (exceptions != NUM_EXCEPTIONS || openChannels != 0) {
throw new RuntimeException("FAILED:" +
" ClosedChannelExceptions: expected: " + NUM_EXCEPTIONS +
" actual: " + exceptions + ";" + System.lineSeparator() +
" number of open channels: expected: 0 " +
" actual: " + openChannels + ".");
}
}
}
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