/*
    * 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.iterables;
  
  import org.apache.giraph.edge.ReusableEdge;
  import org.apache.hadoop.io.Writable;
  import org.apache.hadoop.io.WritableComparable;
  
  /**
   * Wrapper for edge and its source id
   *
   * @param <I> Vertex id
   * @param <E> Edge data
   */
  public class EdgeWithSource<I extends WritableComparable,
      E extends Writable> {
    /** Source id */
    private I sourceVertexId;
    /** Edge */
    private ReusableEdge<I, E> edge;
  
    /**
     * Constructor
     */
    public EdgeWithSource() {
    }
  
    /**
     * Constructor with source id and edge
     *
     * @param sourceVertexId Source id
     * @param edge Edge
     */
    public EdgeWithSource(I sourceVertexId, ReusableEdge<I, E> edge) {
      this.sourceVertexId = sourceVertexId;
      this.edge = edge;
    }
  
    public I getSourceVertexId() {
      return sourceVertexId;
    }
  
    public void setSourceVertexId(I sourceVertexId) {
      this.sourceVertexId = sourceVertexId;
    }
  
    public ReusableEdge<I, E> getEdge() {
      return edge;
    }
  
    public void setEdge(ReusableEdge<I, E> edge) {
      this.edge = edge;
    }
  
    public I getTargetVertexId() {
      return edge.getTargetVertexId();
    }
  
    /**
     * Set target vertex id of this edge
     *
     * @param targetVertexId Target vertex id
     */
    public void setTargetVertexId(I targetVertexId) {
      edge.setTargetVertexId(targetVertexId);
    }
  
    public E getEdgeValue() {
      return edge.getValue();
    }
  
    /**
     * Set the value of this edge
     *
     * @param value Edge value
     */
    public void setEdgeValue(E value) {
      edge.setValue(value);
    }
  }