/*

  * 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.io.gora;

 import java.io.IOException;

 import java.util.Iterator;

 import org.apache.giraph.edge.Edge;

 import org.apache.giraph.graph.Vertex;

 import org.apache.giraph.io.VertexWriter;

 import org.apache.giraph.io.gora.generated.GVertexResult;

 import org.apache.gora.persistency.Persistent;

 import org.apache.hadoop.io.DoubleWritable;

 import org.apache.hadoop.io.FloatWritable;

 import org.apache.hadoop.io.LongWritable;

 import org.apache.hadoop.mapreduce.TaskAttemptContext;

 /**

  * Implementation of a specific reader for a generated data bean.

  */

 public class GoraGVertexVertexOutputFormat

   extends GoraVertexOutputFormat<LongWritable, DoubleWritable,

   FloatWritable> {

   /**

    * DEfault constructor

    */

   public GoraGVertexVertexOutputFormat() {

   }

   @Override

   public VertexWriter<LongWritable, DoubleWritable, FloatWritable>

   createVertexWriter(TaskAttemptContext context)

     throws IOException, InterruptedException {

     return new GoraGVertexVertexWriter();

   }

   /**

    * Gora vertex writer.

    */

   protected class GoraGVertexVertexWriter extends GoraVertexWriter {

     @Override

     protected Persistent getGoraVertex(

         Vertex<LongWritable, DoubleWritable, FloatWritable> vertex) {

       GVertexResult tmpGVertex = new GVertexResult();

       tmpGVertex.setVertexId(vertex.getId().toString());

       tmpGVertex.setVertexValue(Float.parseFloat(vertex.getValue().toString()));

       Iterator<Edge<LongWritable, FloatWritable>> it =

           vertex.getEdges().iterator();

       while (it.hasNext()) {

         Edge<LongWritable, FloatWritable> edge = it.next();

         tmpGVertex.getEdges().put(

             edge.getTargetVertexId().toString(),

             edge.getValue().toString());

       }

       return tmpGVertex;

     }

     @Override

     protected Object getGoraKey(

         Vertex<LongWritable, DoubleWritable, FloatWritable> vertex) {

       String goraKey = String.valueOf(vertex.getId());

       return goraKey;

     }

   }

 }