| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.giraph.examples; |
| |
| import com.google.common.collect.Lists; |
| import org.apache.giraph.conf.ImmutableClassesGiraphConfigurable; |
| import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration; |
| import org.apache.giraph.edge.Edge; |
| import org.apache.giraph.edge.EdgeFactory; |
| import org.apache.giraph.graph.Vertex; |
| import org.apache.giraph.io.formats.TextVertexInputFormat; |
| import org.apache.hadoop.io.DoubleWritable; |
| import org.apache.hadoop.io.FloatWritable; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.hadoop.mapreduce.InputSplit; |
| import org.apache.hadoop.mapreduce.TaskAttemptContext; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.regex.Pattern; |
| |
| /** |
| * Simple text-based {@link org.apache.giraph.io.VertexInputFormat} for |
| * weighted graphs with long ids. Each line consists of: vertex neighbor1:weight |
| * neighbor2:weight ... |
| */ |
| public class LongDoubleFloatTextInputFormat |
| extends TextVertexInputFormat<LongWritable, DoubleWritable, FloatWritable> |
| implements ImmutableClassesGiraphConfigurable<LongWritable, DoubleWritable, |
| FloatWritable> { |
| /** Configuration. */ |
| private ImmutableClassesGiraphConfiguration<LongWritable, DoubleWritable, |
| FloatWritable> conf; |
| |
| @Override |
| public TextVertexReader createVertexReader(InputSplit split, |
| TaskAttemptContext context) throws IOException { |
| return new LongDoubleFloatVertexReader(); |
| } |
| |
| @Override |
| public void setConf(ImmutableClassesGiraphConfiguration<LongWritable, |
| DoubleWritable, FloatWritable> configuration) { |
| this.conf = configuration; |
| } |
| |
| @Override |
| public ImmutableClassesGiraphConfiguration<LongWritable, DoubleWritable, |
| FloatWritable> getConf() { |
| return conf; |
| } |
| |
| /** |
| * Vertex reader associated with |
| * {@link LongDoubleDoubleTextInputFormat}. |
| */ |
| public class LongDoubleFloatVertexReader extends |
| TextVertexInputFormat<LongWritable, DoubleWritable, |
| FloatWritable>.TextVertexReader { |
| /** Separator of the vertex and neighbors */ |
| private final Pattern neighborSeparator = Pattern.compile("[\t ]"); |
| /** Separator of a neighbor and its weight */ |
| private final Pattern weightSeparator = Pattern.compile("[:]"); |
| |
| @Override |
| public Vertex<LongWritable, DoubleWritable, FloatWritable> |
| getCurrentVertex() throws IOException, InterruptedException { |
| Vertex<LongWritable, DoubleWritable, FloatWritable> |
| vertex = conf.createVertex(); |
| |
| String[] tokens = neighborSeparator.split(getRecordReader() |
| .getCurrentValue().toString()); |
| List<Edge<LongWritable, FloatWritable>> edges = |
| Lists.newArrayListWithCapacity(tokens.length - 1); |
| |
| for (int n = 1; n < tokens.length; n++) { |
| String[] parts = weightSeparator.split(tokens[n]); |
| edges.add(EdgeFactory.create( |
| new LongWritable(Long.parseLong(parts[0])), |
| new FloatWritable(Float.parseFloat(parts[1])))); |
| } |
| |
| LongWritable vertexId = new LongWritable(Long.parseLong(tokens[0])); |
| vertex.initialize(vertexId, new DoubleWritable(), edges); |
| |
| return vertex; |
| } |
| |
| @Override |
| public boolean nextVertex() throws IOException, InterruptedException { |
| return getRecordReader().nextKeyValue(); |
| } |
| } |
| } |