Coverage Report - datafu.pig.numbers.RandInt
 
Classes in this File Line Coverage Branch Coverage Complexity
RandInt
62%
5/8
50%
1/2
3.5
 
 1  
 /*
 2  
  * Copyright 2010 LinkedIn, Inc
 3  
  * 
 4  
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 5  
  * use this file except in compliance with the License. You may obtain a copy of
 6  
  * the License at
 7  
  * 
 8  
  * http://www.apache.org/licenses/LICENSE-2.0
 9  
  * 
 10  
  * Unless required by applicable law or agreed to in writing, software
 11  
  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 12  
  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 13  
  * License for the specific language governing permissions and limitations under
 14  
  * the License.
 15  
  */
 16  
  
 17  
 package datafu.pig.numbers;
 18  
 
 19  
 import java.io.IOException;
 20  
 import java.util.Random;
 21  
 
 22  
 import org.apache.pig.data.DataType;
 23  
 import org.apache.pig.impl.logicalLayer.schema.Schema;
 24  
 
 25  
 import datafu.pig.util.SimpleEvalFunc;
 26  
 
 27  
 /**
 28  
  * Generates a uniformly distributed integer between two bounds
 29  
  */
 30  451
 public class RandInt extends SimpleEvalFunc<Integer> 
 31  
 {
 32  451
   private final Random rand = new Random();
 33  
   
 34  
   /**
 35  
    * @param min lower bound for random number
 36  
    * @param max upper bound for random number
 37  
    */
 38  
   public Integer call(Integer min, Integer max) throws IOException
 39  
   {
 40  
     try
 41  
     {
 42  100
       if (min > max)
 43  
       {
 44  0
         throw new RuntimeException("The first argument must be less than the second");
 45  
       }
 46  100
       return rand.nextInt(max - min + 1) + min;
 47  
     }
 48  0
     catch (Exception e) {
 49  0
       throw new IOException(e);
 50  
     }
 51  
   }
 52  
 
 53  
   @Override
 54  
   public Schema outputSchema(Schema input)
 55  
   {
 56  41
     return new Schema(new Schema.FieldSchema("rand", DataType.INTEGER));
 57  
   }
 58  
   
 59  
 }
 60