/**
* Creates file blah: 0000 0001 0002 0003 . . . 3999
*
* <p>Blah extends beyond a single page of memory so that the ability to index into a file of
* multiple pages is tested.
*/
private static void initTestFile(File blah) throws Exception {
try (BufferedWriter writer = Files.newBufferedWriter(blah.toPath(), ISO_8859_1)) {
for (int i = 0; i < 4000; i++) {
String number = new Integer(i).toString();
for (int h = 0; h < 4 - number.length(); h++) writer.write("0");
writer.write("" + i);
writer.newLine();
}
}
}
/** Test exceptions specified by map method */
private static void testExceptions() throws Exception {
// check exceptions when channel opened for read access
try (FileChannel fc = FileChannel.open(blah.toPath(), READ)) {
testExceptions(fc);
checkException(fc, MapMode.READ_WRITE, 0L, fc.size(), NonWritableChannelException.class);
checkException(
fc,
MapMode.READ_WRITE,
-1L,
fc.size(),
NonWritableChannelException.class,
IllegalArgumentException.class);
checkException(
fc,
MapMode.READ_WRITE,
0L,
-1L,
NonWritableChannelException.class,
IllegalArgumentException.class);
checkException(fc, MapMode.PRIVATE, 0L, fc.size(), NonWritableChannelException.class);
checkException(
fc,
MapMode.PRIVATE,
-1L,
fc.size(),
NonWritableChannelException.class,
IllegalArgumentException.class);
checkException(
fc,
MapMode.PRIVATE,
0L,
-1L,
NonWritableChannelException.class,
IllegalArgumentException.class);
}
// check exceptions when channel opened for write access
try (FileChannel fc = FileChannel.open(blah.toPath(), WRITE)) {
testExceptions(fc);
checkException(fc, MapMode.READ_ONLY, 0L, fc.size(), NonReadableChannelException.class);
checkException(
fc,
MapMode.READ_ONLY,
-1L,
fc.size(),
NonReadableChannelException.class,
IllegalArgumentException.class);
/*
* implementation/spec mismatch, these tests disabled for now
*/
// checkException(fc, MapMode.READ_WRITE, 0L, fc.size(),
// NonWritableChannelException.class);
// checkException(fc, MapMode.PRIVATE, 0L, fc.size(),
// NonWritableChannelException.class);
}
// check exceptions when channel opened for read and write access
try (FileChannel fc = FileChannel.open(blah.toPath(), READ, WRITE)) {
testExceptions(fc);
}
}