@Override
public boolean evaluate(Tuple tuple, ImmutableBytesWritable ptr) {
if (!getStringExpression().evaluate(tuple, ptr)) {
return false;
}
if (ptr.getLength() == 0) {
ptr.set(ByteUtil.EMPTY_BYTE_ARRAY);
return true;
}
byte[] string = ptr.get();
int offset = ptr.getOffset();
int length = ptr.getLength();
ColumnModifier columnModifier = getColumnModifier();
int end = StringUtil.getFirstNonBlankCharIdxFromEnd(string, offset, length, columnModifier);
if (end == offset - 1) {
ptr.set(ByteUtil.EMPTY_BYTE_ARRAY);
return true;
}
int head = StringUtil.getFirstNonBlankCharIdxFromStart(string, offset, length, columnModifier);
ptr.set(string, head, end - head + 1);
return true;
}
