| /* |
| * 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.data; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.util.*; |
| |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.AccumulativeTupleBuffer; |
| |
| public class AccumulativeBag implements DataBag { |
| private static final long serialVersionUID = 1L; |
| |
| private transient AccumulativeTupleBuffer buffer; |
| private int index; |
| |
| public AccumulativeBag(AccumulativeTupleBuffer buffer, int index) { |
| this.buffer = buffer; |
| this.index = index; |
| } |
| |
| public void add(Tuple t) { |
| throw new RuntimeException("AccumulativeBag does not support add operation"); |
| } |
| |
| public void addAll(DataBag b) { |
| throw new RuntimeException("AccumulativeBag does not support add operation"); |
| } |
| |
| public void clear() { |
| throw new RuntimeException("AccumulativeBag does not support clear operation"); |
| } |
| |
| public boolean isDistinct() { |
| return false; |
| } |
| |
| public boolean isSorted() { |
| return false; |
| } |
| |
| public AccumulativeTupleBuffer getTuplebuffer() { |
| return buffer; |
| } |
| |
| public Iterator<Tuple> iterator() { |
| return buffer.getTuples(index); |
| } |
| |
| public void markStale(boolean stale) { |
| |
| } |
| |
| public long size() { |
| int size = 0; |
| for (Iterator<Tuple> it = iterator(); it.hasNext(); it.next(), ++size); |
| return size; |
| } |
| |
| public long getMemorySize() { |
| return 0; |
| } |
| |
| public long spill() { |
| return 0; |
| } |
| |
| public void readFields(DataInput datainput) throws IOException { |
| throw new IOException("AccumulativeBag does not support readFields operation"); |
| } |
| |
| public void write(DataOutput dataoutput) throws IOException { |
| throw new IOException("AccumulativeBag does not support write operation"); |
| } |
| |
| public int compareTo(Object other) { |
| throw new RuntimeException("AccumulativeBag does not support compareTo() operation"); |
| } |
| |
| public boolean equals(Object other) { |
| if (this == other) { |
| return true; |
| } |
| |
| return false; |
| } |
| |
| public int hashCode() { |
| assert false : "hashCode not designed"; |
| return 42; |
| } |
| |
| } |