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EachVertexInit xref
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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.block_app.test_setup.graphs;
19  
20  import org.apache.giraph.block_app.test_setup.NumericTestGraph;
21  import org.apache.giraph.block_app.test_setup.TestGraphModifier;
22  import org.apache.giraph.function.Consumer;
23  import org.apache.giraph.graph.Vertex;
24  import org.apache.hadoop.io.Writable;
25  import org.apache.hadoop.io.WritableComparable;
26  
27  /**
28   * Traverse each Vertex in the graph, and initialize it with a given
29   * consumer function.
30   *
31   * @param <I> Vertex id type
32   * @param <V> Vertex value type
33   * @param <E> Edge value type
34   */
35  public class EachVertexInit<I extends WritableComparable, V extends Writable,
36      E extends Writable> implements TestGraphModifier<I, V, E> {
37    private final Consumer<Vertex<I, V, E>> vertexConsumer;
38  
39    public EachVertexInit(Consumer<Vertex<I, V, E>> vertexConsumer) {
40      this.vertexConsumer = vertexConsumer;
41    }
42  
43    @Override
44    public void modifyGraph(NumericTestGraph<I, V, E> graph) {
45      for (Vertex<I, V, E> vertex : graph.getTestGraph()) {
46        vertexConsumer.apply(vertex);
47      }
48    }
49  }