public boolean open() throws IOException {
if (!_isValid) return false;
_is = _path.openRead();
_is.skip(_offset);
_index = 0;
return true;
}
/**
* Creates a new Jar.
*
* @param path canonical path
*/
public ZipScanner(Path path) {
try {
_path = path;
int length = (int) path.getLength();
ReadStream is = path.openRead();
try {
// PACK200 is a standard comment, so try skipping it first
is.skip(length - 22 - 7);
if (is.read() != 0x50) {
is.skip(6);
if (is.read() != 0x50) return;
}
if (is.read() == 0x4b && is.read() == 0x05 && is.read() == 0x06) {
_isValid = true;
}
if (_isValid) {
is.skip(6);
_entries = is.read() + (is.read() << 8);
is.skip(4);
_offset = readInt(is);
}
} finally {
is.close();
}
} catch (Exception e) {
log().log(Level.FINER, e.toString(), e);
}
}