/** decodes the contexts at the current position */
protected Set<BytesRef> decodeContexts(BytesRef scratch, ByteArrayDataInput tmpInput) {
tmpInput.reset(scratch.bytes);
tmpInput.skipBytes(scratch.length - 2); // skip to context set size
short ctxSetSize = tmpInput.readShort();
scratch.length -= 2;
final Set<BytesRef> contextSet = new HashSet<>();
for (short i = 0; i < ctxSetSize; i++) {
tmpInput.setPosition(scratch.length - 2);
short curContextLength = tmpInput.readShort();
scratch.length -= 2;
tmpInput.setPosition(scratch.length - curContextLength);
BytesRef contextSpare = new BytesRef(curContextLength);
tmpInput.readBytes(contextSpare.bytes, 0, curContextLength);
contextSpare.length = curContextLength;
contextSet.add(contextSpare);
scratch.length -= curContextLength;
}
return contextSet;
}
/** decodes the payload at the current position */
protected BytesRef decodePayload(BytesRef scratch, ByteArrayDataInput tmpInput) {
tmpInput.reset(scratch.bytes);
tmpInput.skipBytes(scratch.length - 2); // skip to payload size
short payloadLength = tmpInput.readShort(); // read payload size
tmpInput.setPosition(scratch.length - 2 - payloadLength); // setPosition to start of payload
BytesRef payloadScratch = new BytesRef(payloadLength);
tmpInput.readBytes(payloadScratch.bytes, 0, payloadLength); // read payload
payloadScratch.length = payloadLength;
scratch.length -= 2; // payload length info (short)
scratch.length -= payloadLength; // payload
return payloadScratch;
}