| /* |
| * 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.factories; |
| |
| import org.apache.giraph.conf.GiraphConfigurationSettable; |
| import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration; |
| import org.apache.giraph.utils.WritableUtils; |
| import org.apache.hadoop.io.Writable; |
| |
| /** |
| * Factory class to create default edge values. |
| * A user can extend this class in order to customize the creation of new |
| * edge values when an edge is created by the infrastructure. |
| * |
| * @param <E> Edge Value |
| */ |
| public class DefaultEdgeValueFactory<E extends Writable> |
| implements EdgeValueFactory<E>, GiraphConfigurationSettable { |
| /** Cached edge value class. */ |
| private Class<E> edgeValueClass; |
| /** Configuration */ |
| private ImmutableClassesGiraphConfiguration conf; |
| |
| @Override |
| public void setConf(ImmutableClassesGiraphConfiguration conf) { |
| this.conf = conf; |
| edgeValueClass = conf.getEdgeValueClass(); |
| } |
| |
| @Override public E newInstance() { |
| return WritableUtils.createWritable(edgeValueClass, conf); |
| } |
| } |