java/pig-galago/src/com/yahoo/pig/builtin/IsEmpty.java

   1 /*
   2  * Copyright (c) 2007 Yahoo! Inc.  All rights reserved.
   3  * See accompanying LICENSE file.
   4  */
   5 package com.yahoo.pig.builtin;
   6
   7 import java.io.IOException;
   8
   9 import com.yahoo.pig.FilterFunc;
  10 import com.yahoo.pig.data.Tuple;
  11
  12 public class IsEmpty extends FilterFunc {
  13
  14     @Override
  15     public boolean exec(Tuple input) throws IOException {
  16         return (input.getBagField(0).cardinality() == 0);
  17     }
  18
  19 }