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 19 package org.apache.giraph.utils; 20 21 import org.apache.giraph.edge.Edge; 22 import org.apache.hadoop.io.Writable; 23 import org.apache.hadoop.io.WritableComparable; 24 25 /** 26 * Special iterator that reuses vertex ids and edge objects so that the 27 * lifetime of the object is only until next() is called. 28 * 29 * @param <I> vertexId type parameter 30 * @param <E> edge type parameter 31 */ 32 public class ByteStructVertexIdEdgeIterator<I extends WritableComparable, 33 E extends Writable> extends ByteStructVertexIdDataIterator<I, Edge<I, E>> 34 implements VertexIdEdgeIterator<I, E> { 35 36 /** 37 * Constructor 38 * 39 * @param vertexIdData vertexIdData 40 */ 41 public ByteStructVertexIdEdgeIterator( 42 AbstractVertexIdData<I, Edge<I, E>> vertexIdData) { 43 super(vertexIdData); 44 } 45 46 @Override 47 public Edge<I, E> getCurrentEdge() { 48 return getCurrentData(); 49 } 50 51 52 @Override 53 public Edge<I, E> releaseCurrentEdge() { 54 return releaseCurrentData(); 55 } 56 }