| /* |
| * 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 + "."); |
| } |
| } |
| } |