| /** |
| * 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 edu.uci.ics.hivesterix.serde.lazy; |
| |
| import org.apache.hadoop.io.IntWritable; |
| |
| import edu.uci.ics.hivesterix.serde.lazy.LazyUtils.VInt; |
| import edu.uci.ics.hivesterix.serde.lazy.objectinspector.primitive.LazyIntObjectInspector; |
| |
| /** |
| * LazyObject for storing a value of Integer. |
| * <p> |
| * Part of the code is adapted from Apache Harmony Project. As with the specification, this implementation relied on code laid out in <a href="http://www.hackersdelight.org/">Henry S. Warren, Jr.'s Hacker's Delight, (Addison Wesley, 2002)</a> as well as <a href="http://aggregate.org/MAGIC/">The Aggregate's Magic Algorithms</a>. |
| * </p> |
| */ |
| public class LazyInteger extends LazyPrimitive<LazyIntObjectInspector, IntWritable> { |
| |
| public LazyInteger(LazyIntObjectInspector oi) { |
| super(oi); |
| data = new IntWritable(); |
| } |
| |
| public LazyInteger(LazyInteger copy) { |
| super(copy); |
| data = new IntWritable(copy.data.get()); |
| } |
| |
| /** |
| * The reusable vInt for decoding the integer. |
| */ |
| VInt vInt = new LazyUtils.VInt(); |
| |
| @Override |
| public void init(byte[] bytes, int start, int length) { |
| if (length == 0) { |
| isNull = true; |
| return; |
| } else |
| isNull = false; |
| |
| LazyUtils.readVInt(bytes, start, vInt); |
| assert (length == vInt.length); |
| if (length != vInt.length) |
| throw new IllegalStateException("parse int: length mismatch, expected " + vInt.length + " but get " |
| + length); |
| data.set(vInt.value); |
| } |
| } |