IteratingAccumulatorSum.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.test.udf.evalfunc;

import java.io.IOException;
import java.util.Iterator;

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

public class IteratingAccumulatorSum extends IteratingAccumulatorEvalFunc<Long> {
    public Long exec(Iterator<Tuple> iter) throws IOException {
        long sum = 0;
        for (; iter.hasNext(); sum += (Long)iter.next().get(0)) {
            continue;
        }
        return sum;
    }
}