Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
VertexValueCombiner |
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| 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.graph; | |
20 | ||
21 | import org.apache.hadoop.io.Writable; | |
22 | ||
23 | /** | |
24 | * When vertex values with the same vertex id are loaded, this | |
25 | * class specifies how to combine their vertex values. Edges loaded will | |
26 | * be added to the EdgeStore. | |
27 | * | |
28 | * @param <V> Vertex data | |
29 | */ | |
30 | public interface VertexValueCombiner<V extends Writable> { | |
31 | /** | |
32 | * Combine a vertex with the original vertex | |
33 | * by modifying originalVertex. | |
34 | * | |
35 | * @param originalVertexValue Combine the other vertex into this one | |
36 | * @param vertexValue Combine into the originalVertex. | |
37 | */ | |
38 | void combine(V originalVertexValue, V vertexValue); | |
39 | } |