| /* |
| * 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.io; |
| |
| import java.io.DataInput; |
| import java.io.IOException; |
| |
| import org.apache.pig.data.BinInterSedes; |
| import org.apache.pig.data.Tuple; |
| import org.apache.pig.data.TupleFactory; |
| |
| /** |
| * |
| */ |
| public class NullableTuple extends PigNullableWritable { |
| |
| private TupleFactory mFactory = null; |
| private static final BinInterSedes bis = new BinInterSedes(); |
| |
| public NullableTuple() { |
| } |
| |
| /** |
| * @param t |
| */ |
| public NullableTuple(Tuple t) { |
| mValue = t; |
| } |
| |
| public NullableTuple(NullableTuple copy) { |
| setNull(copy.isNull()); |
| mValue = copy.mValue; |
| setIndex(copy.getIndex()); |
| } |
| |
| @Override |
| public Object getValueAsPigType() { |
| return isNull() ? null : (Tuple)mValue; |
| } |
| |
| @Override |
| public void readFields(DataInput in) throws IOException { |
| boolean nullness = in.readBoolean(); |
| setNull(nullness); |
| // Free up the previous value for GC |
| mValue = null; |
| if (!nullness) { |
| mValue = bis.readTuple(in); |
| } |
| setIndex(in.readByte()); |
| } |
| |
| } |