Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
AndReduce |
|
| 1.25;1.25 |
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 | package org.apache.giraph.reducers.impl; | |
19 | ||
20 | import java.io.DataInput; | |
21 | import java.io.DataOutput; | |
22 | import java.io.IOException; | |
23 | ||
24 | import org.apache.giraph.reducers.ReduceSameTypeOperation; | |
25 | import org.apache.hadoop.io.BooleanWritable; | |
26 | ||
27 | /** | |
28 | * | |
29 | * ReduceOperation for calculating the AND function over boolean values. | |
30 | * The default value when nothing is aggregated is true. | |
31 | * | |
32 | */ | |
33 | 0 | public class AndReduce extends ReduceSameTypeOperation<BooleanWritable> { |
34 | /** Instance */ | |
35 | 0 | public static final AndReduce INSTANCE = new AndReduce(); |
36 | ||
37 | @Override | |
38 | public BooleanWritable createInitialValue() { | |
39 | 0 | return new BooleanWritable(true); |
40 | } | |
41 | ||
42 | @Override | |
43 | public BooleanWritable reduce( | |
44 | BooleanWritable curValue, BooleanWritable valueToReduce) { | |
45 | 0 | curValue.set(curValue.get() && valueToReduce.get()); |
46 | 0 | return curValue; |
47 | } | |
48 | ||
49 | @Override | |
50 | public void write(DataOutput out) throws IOException { | |
51 | 0 | } |
52 | ||
53 | @Override | |
54 | public void readFields(DataInput in) throws IOException { | |
55 | 0 | } |
56 | } |