Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
LongXorReduce |
|
| 1.0;1 |
1 | /* | |
2 | * Licensed to the Apache Software Foundation (ASF) under one | |
3 | * or more contributor license agreements. See the NOTICE file | |
4 | * distributed with this work for additional information | |
5 | * regarding copyright ownership. The ASF licenses this file | |
6 | * to you under the Apache License, Version 2.0 (the | |
7 | * "License"); you may not use this file except in compliance | |
8 | * with the License. You may obtain a copy of the License at | |
9 | * | |
10 | * http://www.apache.org/licenses/LICENSE-2.0 | |
11 | * | |
12 | * Unless required by applicable law or agreed to in writing, software | |
13 | * distributed under the License is distributed on an "AS IS" BASIS, | |
14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
15 | * See the License for the specific language governing permissions and | |
16 | * limitations under the License. | |
17 | */ | |
18 | ||
19 | package org.apache.giraph.reducers.impl; | |
20 | ||
21 | import java.io.DataInput; | |
22 | import java.io.DataOutput; | |
23 | import java.io.IOException; | |
24 | import org.apache.giraph.reducers.ReduceSameTypeOperation; | |
25 | import org.apache.hadoop.io.LongWritable; | |
26 | ||
27 | /** | |
28 | * ReduceOperation that XORs (^) values together. | |
29 | */ | |
30 | 0 | public class LongXorReduce extends ReduceSameTypeOperation<LongWritable> { |
31 | /** | |
32 | * Long XOR, equivalent to l1 ^ l2 | |
33 | */ | |
34 | 0 | public static final LongXorReduce INSTANCE = new LongXorReduce(); |
35 | ||
36 | /** Constructor used for deserialization only */ | |
37 | 0 | public LongXorReduce() { |
38 | 0 | } |
39 | ||
40 | @Override public LongWritable createInitialValue() { | |
41 | 0 | return new LongWritable(0L); |
42 | } | |
43 | ||
44 | @Override public LongWritable reduce(LongWritable curValue, | |
45 | LongWritable valueToReduce) { | |
46 | 0 | curValue.set(curValue.get() ^ valueToReduce.get()); |
47 | 0 | return curValue; |
48 | } | |
49 | ||
50 | @Override public void write(DataOutput out) throws IOException { | |
51 | 0 | } |
52 | ||
53 | @Override public void readFields(DataInput in) throws IOException { | |
54 | 0 | } |
55 | } |