| 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.LongWritable; | |
| 24 | import org.apache.hadoop.mapreduce.InputSplit; | |
| 25 | import org.apache.hadoop.mapreduce.TaskAttemptContext; | |
| 26 | ||
| 27 | /** | |
| 28 | * InputFormat for reading graphs stored as (ordered) adjacency lists | |
| 29 | * with the vertex ids longs and the vertex values and edges doubles. | |
| 30 | * For example: | |
| 31 | * 22 0.1 45 0.3 99 0.44 | |
| 32 | * to repesent a vertex with id 22, value of 0.1 and edges to nodes 45 and 99, | |
| 33 | * with values of 0.3 and 0.44, respectively. | |
| 34 | */ | |
| 35 | 0 | public class LongDoubleDoubleAdjacencyListVertexInputFormat |
| 36 | extends AdjacencyListTextVertexInputFormat<LongWritable, DoubleWritable, | |
| 37 | DoubleWritable> { | |
| 38 | ||
| 39 | @Override | |
| 40 | public AdjacencyListTextVertexReader createVertexReader(InputSplit split, | |
| 41 | TaskAttemptContext context) { | |
| 42 | 0 | return new LongDoubleDoubleAdjacencyListVertexReader(null); |
| 43 | } | |
| 44 | ||
| 45 | /** | |
| 46 | * VertexReader associated with | |
| 47 | * {@link LongDoubleDoubleAdjacencyListVertexInputFormat}. | |
| 48 | */ | |
| 49 | 0 | protected class LongDoubleDoubleAdjacencyListVertexReader extends |
| 50 | AdjacencyListTextVertexReader { | |
| 51 | ||
| 52 | /** | |
| 53 | * Constructor with | |
| 54 | * {@link AdjacencyListTextVertexInputFormat.LineSanitizer}. | |
| 55 | * | |
| 56 | * @param lineSanitizer the sanitizer to use for reading | |
| 57 | */ | |
| 58 | public LongDoubleDoubleAdjacencyListVertexReader(LineSanitizer | |
| 59 | 0 | lineSanitizer) { |
| 60 | 0 | super(lineSanitizer); |
| 61 | 0 | } |
| 62 | ||
| 63 | @Override | |
| 64 | public LongWritable decodeId(String s) { | |
| 65 | 0 | return new LongWritable(Long.parseLong(s)); |
| 66 | } | |
| 67 | ||
| 68 | @Override | |
| 69 | public DoubleWritable decodeValue(String s) { | |
| 70 | 0 | return new DoubleWritable(Double.parseDouble(s)); |
| 71 | } | |
| 72 | ||
| 73 | @Override | |
| 74 | public Edge<LongWritable, DoubleWritable> decodeEdge(String s1, String s2) { | |
| 75 | 0 | return EdgeFactory.create(new LongWritable(Long.parseLong(s1)), |
| 76 | 0 | new DoubleWritable(Double.parseDouble(s2))); |
| 77 | } | |
| 78 | } | |
| 79 | ||
| 80 | } |