/*
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* 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.
*
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*/
/* @test
* @bug 4563125
* @summary Test size method of FileChannel
* @run main/othervm Size
*/
import java.io.*;
import java.nio.MappedByteBuffer;
import java.nio.channels.*;
import java.util.Random;
/**
* Testing FileChannel's size method.
*/
public class Size {
private static Random generator = new Random();
private static File blah;
public static void main(String[] args) throws Exception {
test1();
test2();
}
private static void test1() throws Exception {
blah = File.createTempFile("blah", null);
blah.deleteOnExit();
for(int i=0; i<100; i++) {
long testSize = generator.nextInt(1000);
initTestFile(blah, testSize);
FileInputStream fis = new FileInputStream(blah);
FileChannel c = fis.getChannel();
if (c.size() != testSize)
throw new RuntimeException("Size failed");
c.close();
fis.close();
}
blah.delete();
}
// Test for bug 4563125
private static void test2() throws Exception {
// Windows and Linux can't handle the really large file sizes for a truncate
// or a positional write required by the test for 4563125
String osName = System.getProperty("os.name");
if (osName.startsWith("SunOS") || osName.contains("OS X")) {
blah = File.createTempFile("blah", null);
long testSize = ((long)Integer.MAX_VALUE) * 2;
initTestFile(blah, 10);
RandomAccessFile raf = new RandomAccessFile(blah, "rw");
FileChannel fc = raf.getChannel();
fc.size();
fc.map(FileChannel.MapMode.READ_WRITE, testSize, 10);
if (fc.size() != testSize + 10)
throw new RuntimeException("Size failed " + fc.size());
fc.close();
raf.close();
blah.delete();
}
}
/**
* Creates file blah of specified size in bytes.
*
*/
private static void initTestFile(File blah, long size) throws Exception {
if (blah.exists())
blah.delete();
FileOutputStream fos = new FileOutputStream(blah);
BufferedWriter awriter
= new BufferedWriter(new OutputStreamWriter(fos, "8859_1"));
for(int i=0; i<size; i++) {
awriter.write("e");
}
awriter.flush();
awriter.close();
}
}