/**
* Check out.
*
* @param lengthToWrite the length
* @throws IOException Signals that an I/O exception has occurred.
*/
private void checkOut(int lengthToWrite) throws IOException {
if (_closed) throw new IOException("CLOSED");
if (_out == null) {
long length = _wrapper.getContentLength();
if (_response.isCommitted() || (length >= 0 && length < _wrapper.getMinCompressSize()))
doNotCompress(false);
else if (lengthToWrite > _wrapper.getMinCompressSize()) doCompress();
else _out = _bOut = new ByteArrayOutputStream2(_wrapper.getBufferSize());
} else if (_bOut != null) {
long length = _wrapper.getContentLength();
if (_response.isCommitted() || (length >= 0 && length < _wrapper.getMinCompressSize()))
doNotCompress(false);
else if (lengthToWrite >= (_bOut.getBuf().length - _bOut.getCount())) doCompress();
}
}
/** @see java.io.OutputStream#flush() */
@Override
public void flush() throws IOException {
if (_out == null || _bOut != null) {
long length = _wrapper.getContentLength();
if (length > 0 && length < _wrapper.getMinCompressSize()) doNotCompress(false);
else doCompress();
}
_out.flush();
}
/** Instantiates a new compressed stream. */
public AbstractCompressedStream(
String encoding, HttpServletRequest request, CompressedResponseWrapper wrapper, String vary)
throws IOException {
_encoding = encoding;
_wrapper = wrapper;
_response = (HttpServletResponse) wrapper.getResponse();
_vary = vary;
if (_wrapper.getMinCompressSize() == 0) doCompress();
}
/**
* Finish.
*
* @throws IOException Signals that an I/O exception has occurred.
*/
public void finish() throws IOException {
if (!_closed) {
if (_out == null || _bOut != null) {
long length = _wrapper.getContentLength();
if (length > 0 && length < _wrapper.getMinCompressSize()) doNotCompress(false);
else doCompress();
}
if (_compressedOutputStream != null && !_closed) {
_closed = true;
_compressedOutputStream.close();
}
}
}
/** @see java.io.OutputStream#close() */
@Override
public void close() throws IOException {
if (_closed) return;
if (_wrapper.getRequest().getAttribute("javax.servlet.include.request_uri") != null) flush();
else {
if (_bOut != null) {
long length = _wrapper.getContentLength();
if (length < 0) {
length = _bOut.getCount();
_wrapper.setContentLength(length);
}
if (length < _wrapper.getMinCompressSize()) doNotCompress(false);
else doCompress();
} else if (_out == null) {
// No output
doNotCompress(false);
}
if (_compressedOutputStream != null) _compressedOutputStream.close();
else _out.close();
_closed = true;
}
}