public boolean append(BlockCursor cursor) {
// the extra BYTE here is for the null flag
int writableBytes = sliceOutput.writableBytes() - SIZE_OF_BYTE;
boolean isNull = cursor.isNull();
if (type == Type.FIXED_INT_64) {
if (writableBytes < SIZE_OF_LONG) {
return false;
}
positionOffsets.add(sliceOutput.size());
sliceOutput.writeByte(isNull ? 1 : 0);
sliceOutput.appendLong(isNull ? 0 : cursor.getLong());
} else if (type == Type.DOUBLE) {
if (writableBytes < SIZE_OF_DOUBLE) {
return false;
}
positionOffsets.add(sliceOutput.size());
sliceOutput.writeByte(isNull ? 1 : 0);
sliceOutput.appendDouble(isNull ? 0 : cursor.getDouble());
} else if (type == Type.BOOLEAN) {
if (writableBytes < SIZE_OF_BYTE) {
return false;
}
positionOffsets.add(sliceOutput.size());
sliceOutput.writeByte(isNull ? 1 : 0);
sliceOutput.writeByte(!isNull && cursor.getBoolean() ? 1 : 0);
} else if (type == Type.VARIABLE_BINARY) {
int sliceLength =
isNull ? 0 : getVariableBinaryLength(cursor.getRawSlice(), cursor.getRawOffset());
if (writableBytes < SIZE_OF_INT + sliceLength) {
return false;
}
int startingOffset = sliceOutput.size();
positionOffsets.add(startingOffset);
sliceOutput.writeByte(isNull ? 1 : 0);
sliceOutput.appendInt(sliceLength + SIZE_OF_BYTE + SIZE_OF_INT);
if (!isNull) {
sliceOutput.writeBytes(
cursor.getRawSlice(),
cursor.getRawOffset() + SIZE_OF_BYTE + SIZE_OF_INT,
sliceLength);
}
} else {
throw new IllegalArgumentException("Unsupported type " + type);
}
return true;
}
@Override
public void writeBlock(SliceOutput sliceOutput, Block block) {
int positionCount = block.getPositionCount();
sliceOutput.appendInt(positionCount);
encodeNullsAsBits(sliceOutput, block);
for (int position = 0; position < positionCount; position++) {
if (!block.isNull(position)) {
sliceOutput.writeLong(block.getLong(position, 0));
}
}
}