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 package org.apache.giraph.factories; 19 20 import org.apache.giraph.conf.GiraphConfigurationSettable; 21 import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration; 22 import org.apache.giraph.edge.OutEdges; 23 import org.apache.giraph.utils.ReflectionUtils; 24 import org.apache.hadoop.io.Writable; 25 import org.apache.hadoop.io.WritableComparable; 26 27 /** 28 * Default factory class for creating {@link OutEdges} instances to be used 29 * during input. This factory simply creates an instance of the 30 * {@link OutEdges} class set in the configuration. 31 * 32 * @param <I> Vertex ID type. 33 * @param <E> Edge value type. 34 */ 35 public class DefaultInputOutEdgesFactory<I extends WritableComparable, 36 E extends Writable> implements OutEdgesFactory<I, E>, 37 GiraphConfigurationSettable { 38 /** Configuration */ 39 private ImmutableClassesGiraphConfiguration<I, ?, E> conf; 40 41 @Override 42 public void setConf(ImmutableClassesGiraphConfiguration conf) { 43 this.conf = conf; 44 } 45 46 @Override 47 public OutEdges<I, E> newInstance() { 48 return ReflectionUtils.newInstance(conf.getInputOutEdgesClass(), conf); 49 } 50 }