| /* |
| * 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.utils; |
| |
| import java.io.IOException; |
| import java.util.Iterator; |
| import org.apache.pig.EvalFunc; |
| import org.apache.pig.Accumulator; |
| import org.apache.pig.data.DataBag; |
| import org.apache.pig.data.Tuple; |
| |
| /** |
| * This class is for testing of accumulator udfs |
| * |
| */ |
| public class AccumulativeSumBag extends EvalFunc<String> implements Accumulator<String> |
| { |
| |
| StringBuffer sb; |
| |
| public AccumulativeSumBag() { |
| } |
| |
| public void accumulate(Tuple tuple) throws IOException { |
| DataBag databag = (DataBag)tuple.get(0); |
| if(databag == null) |
| return; |
| |
| if (sb == null) { |
| sb = new StringBuffer(); |
| } |
| |
| Iterator<Tuple> iterator = databag.iterator(); |
| while(iterator.hasNext()) { |
| Tuple t = iterator.next(); |
| if (t.size()>1 && t.get(1) == null) { |
| continue; |
| } |
| |
| sb.append(t.toString()); |
| } |
| } |
| |
| public String getValue() { |
| if (sb != null && sb.length()>0) { |
| return sb.toString(); |
| } |
| return null; |
| } |
| |
| public void cleanup() { |
| sb = null; |
| } |
| |
| public String exec(Tuple tuple) throws IOException { |
| throw new IOException("exec() should not be called"); |
| } |
| } |
| |