| /* |
| * Copyright (c) 2000, 2013, 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 4563125 |
| * @summary Test size method of FileChannel |
| * @run main/othervm Size |
| * @key randomness |
| */ |
| |
| import java.io.*; |
| import java.nio.MappedByteBuffer; |
| import java.nio.channels.*; |
| import java.util.Random; |
| |
| |
| /** |
| * Testing FileChannel's size method. |
| */ |
| |
| public class Size { |
| |
| public static void main(String[] args) throws Exception { |
| testSmallFile(); |
| testLargeFile(); |
| } |
| |
| private static void testSmallFile() throws Exception { |
| File smallFile = new File("smallFileTest"); |
| Random generator = new Random(); |
| for(int i=0; i<100; i++) { |
| long testSize = generator.nextInt(1000); |
| initTestFile(smallFile, testSize); |
| try (FileChannel c = new FileInputStream(smallFile).getChannel()) { |
| if (c.size() != testSize) { |
| throw new RuntimeException("Size failed in testSmallFile. " |
| + "Expect size " + testSize |
| + ", actual size " + c.size()); |
| } |
| } |
| } |
| smallFile.deleteOnExit(); |
| } |
| |
| // Test for bug 4563125 |
| private static void testLargeFile() throws Exception { |
| File largeFile = new File("largeFileTest"); |
| long testSize = ((long)Integer.MAX_VALUE) * 2; |
| initTestFile(largeFile, 10); |
| try (FileChannel fc = new RandomAccessFile(largeFile, "rw").getChannel()) |
| { |
| fc.size(); |
| fc.map(FileChannel.MapMode.READ_WRITE, testSize, 10); |
| if (fc.size() != testSize + 10) { |
| throw new RuntimeException("Size failed in testLargeFile. " |
| + "Expect size " + (testSize + 10) |
| + ", actual size " + fc.size()); |
| } |
| } |
| largeFile.deleteOnExit(); |
| } |
| |
| /** |
| * Create a file with the specified size in bytes. |
| * |
| */ |
| private static void initTestFile(File f, long size) throws Exception { |
| try (BufferedWriter awriter = new BufferedWriter( |
| new OutputStreamWriter(new FileOutputStream(f), "8859_1"))) |
| { |
| for(int i=0; i<size; i++) { |
| awriter.write("e"); |
| } |
| } |
| } |
| } |