src/org/apache/pig/impl/builtin/GFAny.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.pig.impl.builtin;

import java.io.IOException;
import java.util.Random;

import org.apache.pig.EvalFunc;
import org.apache.pig.data.Tuple;


/**
 * built-in grouping function; permits system to choose any grouping.
 */
public class GFAny extends EvalFunc<Integer> {
    public static final int defaultNumGroups = 1000;
    
    int numGroups = defaultNumGroups;
    Random r = new Random();
    
    public GFAny(){}
    
    public GFAny(int numGroups){
        this.numGroups = numGroups;
    }
    
    @Override
    public Integer exec(Tuple input) throws IOException{
        return r.nextInt(numGroups);
    }
}