/** encodes an entry (bytes+(contexts)+(payload)+weight) to the provided writer */
protected void encode(
ByteSequencesWriter writer,
ByteArrayDataOutput output,
byte[] buffer,
BytesRef spare,
BytesRef payload,
Set<BytesRef> contexts,
long weight)
throws IOException {
int requiredLength = spare.length + 8 + ((hasPayloads) ? 2 + payload.length : 0);
if (hasContexts) {
for (BytesRef ctx : contexts) {
requiredLength += 2 + ctx.length;
}
requiredLength += 2; // for length of contexts
}
if (requiredLength >= buffer.length) {
buffer = ArrayUtil.grow(buffer, requiredLength);
}
output.reset(buffer);
output.writeBytes(spare.bytes, spare.offset, spare.length);
if (hasContexts) {
for (BytesRef ctx : contexts) {
output.writeBytes(ctx.bytes, ctx.offset, ctx.length);
output.writeShort((short) ctx.length);
}
output.writeShort((short) contexts.size());
}
if (hasPayloads) {
output.writeBytes(payload.bytes, payload.offset, payload.length);
output.writeShort((short) payload.length);
}
output.writeLong(weight);
writer.write(buffer, 0, output.getPosition());
}
