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.types.ops; 19 20 import org.apache.hadoop.io.MapWritable; 21 22 /** TypeOps implementation for working with MapWritable type */ 23 public enum MapTypeOps implements TypeOps<MapWritable> { 24 /** Singleton instance */ 25 INSTANCE(); 26 27 @Override 28 public Class<MapWritable> getTypeClass() { 29 return MapWritable.class; 30 } 31 32 @Override 33 public MapWritable create() { 34 return new MapWritable(); 35 } 36 37 @Override 38 public MapWritable createCopy(MapWritable from) { 39 return new MapWritable(from); 40 } 41 42 @Override 43 public void set(MapWritable to, MapWritable from) { 44 to.clear(); 45 to.putAll(from); 46 } 47 }