| /* |
| * 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.rexster.io.formats; |
| |
| import java.io.IOException; |
| |
| import org.apache.giraph.edge.Edge; |
| import org.apache.giraph.edge.EdgeFactory; |
| import org.apache.giraph.rexster.io.RexsterEdgeInputFormat; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.hadoop.io.DoubleWritable; |
| import org.apache.hadoop.mapreduce.InputSplit; |
| import org.apache.hadoop.mapreduce.TaskAttemptContext; |
| import org.json.JSONException; |
| import org.json.JSONObject; |
| |
| /** |
| * Rexster Edge Input Format for Long vertex ID's and Double edge values |
| */ |
| public class RexsterLongDoubleEdgeInputFormat |
| extends RexsterEdgeInputFormat<LongWritable, DoubleWritable> { |
| |
| @Override |
| public RexsterEdgeReader createEdgeReader( |
| InputSplit split, TaskAttemptContext context) throws IOException { |
| |
| return new RexsterLongDoubleEdgeReader(); |
| } |
| |
| /** |
| * Rexster edge reader |
| */ |
| protected class RexsterLongDoubleEdgeReader extends RexsterEdgeReader { |
| |
| /** source vertex of the edge */ |
| private LongWritable sourceId; |
| |
| @Override |
| public LongWritable getCurrentSourceId() |
| throws IOException, InterruptedException { |
| |
| return this.sourceId; |
| } |
| |
| @Override |
| protected Edge<LongWritable, DoubleWritable> parseEdge(JSONObject jsonEdge) |
| throws JSONException { |
| |
| Long value = jsonEdge.getLong("value"); |
| Long dest; |
| try { |
| dest = jsonEdge.getLong("_outV"); |
| } catch (JSONException ex) { |
| /* OrientDB compatibility; try to transform it as long */ |
| String idString = jsonEdge.getString("_outV"); |
| String[] splits = idString.split(":"); |
| dest = Long.parseLong(splits[1]); |
| } |
| Edge<LongWritable, DoubleWritable> edge = |
| EdgeFactory.create(new LongWritable(dest), new DoubleWritable(value)); |
| |
| Long sid; |
| try { |
| sid = jsonEdge.getLong("_inV"); |
| } catch (JSONException ex) { |
| /* OrientDB compatibility; try to transform it as long */ |
| String sidString = jsonEdge.getString("_inV"); |
| String[] splits = sidString.split(":"); |
| sid = Long.parseLong(splits[1]); |
| } |
| this.sourceId = new LongWritable(sid); |
| return edge; |
| } |
| } |
| } |