| 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.io.formats; | |
| 19 | ||
| 20 | import org.apache.giraph.edge.Edge; | |
| 21 | import org.apache.giraph.edge.EdgeFactory; | |
| 22 | import org.apache.hadoop.io.DoubleWritable; | |
| 23 | import org.apache.hadoop.io.Text; | |
| 24 | import org.apache.hadoop.mapreduce.InputSplit; | |
| 25 | import org.apache.hadoop.mapreduce.TaskAttemptContext; | |
| 26 | ||
| 27 | /** | |
| 28 | * Class to read graphs stored as adjacency lists with ids represented by | |
| 29 | * Strings and values as doubles. This is a good inputformat for reading | |
| 30 | * graphs where the id types do not matter and can be stashed in a String. | |
| 31 | */ | |
| 32 | 0 | public class TextDoubleDoubleAdjacencyListVertexInputFormat |
| 33 | extends AdjacencyListTextVertexInputFormat<Text, DoubleWritable, | |
| 34 | DoubleWritable> { | |
| 35 | ||
| 36 | @Override | |
| 37 | public AdjacencyListTextVertexReader createVertexReader(InputSplit split, | |
| 38 | TaskAttemptContext context) { | |
| 39 | 0 | return new TextDoubleDoubleAdjacencyListVertexReader(null); |
| 40 | } | |
| 41 | ||
| 42 | /** | |
| 43 | * Vertex reader used with | |
| 44 | * {@link TextDoubleDoubleAdjacencyListVertexInputFormat} | |
| 45 | */ | |
| 46 | 0 | protected class TextDoubleDoubleAdjacencyListVertexReader extends |
| 47 | AdjacencyListTextVertexReader { | |
| 48 | ||
| 49 | /** | |
| 50 | * Constructor with | |
| 51 | * {@link AdjacencyListTextVertexInputFormat.LineSanitizer}. | |
| 52 | * | |
| 53 | * @param lineSanitizer the sanitizer to use for reading | |
| 54 | */ | |
| 55 | public TextDoubleDoubleAdjacencyListVertexReader(LineSanitizer | |
| 56 | 0 | lineSanitizer) { |
| 57 | 0 | super(lineSanitizer); |
| 58 | 0 | } |
| 59 | ||
| 60 | @Override | |
| 61 | public Text decodeId(String s) { | |
| 62 | 0 | return new Text(s); |
| 63 | } | |
| 64 | ||
| 65 | @Override | |
| 66 | public DoubleWritable decodeValue(String s) { | |
| 67 | 0 | return new DoubleWritable(Double.parseDouble(s)); |
| 68 | } | |
| 69 | ||
| 70 | @Override | |
| 71 | public Edge<Text, DoubleWritable> decodeEdge(String s1, String s2) { | |
| 72 | 0 | return EdgeFactory.create(new Text(s1), |
| 73 | 0 | new DoubleWritable(Double.parseDouble(s2))); |
| 74 | } | |
| 75 | } | |
| 76 | ||
| 77 | } |