/**
* Construct a new GZipHandle for the given file.
*
* @throws HandleException if the given file name is not a GZip file.
*/
public GZipHandle(String file) throws IOException {
super();
this.file = file;
if (!isGZipFile(file)) {
throw new HandleException(file + " is not a gzip file.");
}
resetStream();
length = 0;
while (true) {
int skip = stream.skipBytes(1024);
if (skip <= 0) break;
length += skip;
}
resetStream();
}
