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.mapping;
20
21 import org.apache.hadoop.io.LongWritable;
22
23 /**
24 * MappingStoreOps implementation which reads partition information from map
25 */
26 @SuppressWarnings("unchecked, rawtypes")
27 public class DefaultLongByteOps extends AbstractLongByteOps {
28
29 /**
30 * Default constructor (do not use)
31 */
32 public DefaultLongByteOps() {
33 }
34
35 @Override
36 public boolean hasEmbedding() {
37 return false;
38 }
39
40 @Override
41 public void embedTargetInfo(LongWritable id) {
42 throw new UnsupportedOperationException();
43 }
44
45 @Override
46 public void removeTargetInfo(LongWritable id) {
47 throw new UnsupportedOperationException();
48 }
49
50 @Override
51 public int getPartition(LongWritable id, int partitionCount,
52 int workerCount) {
53 byte target = mappingStore.getByteTarget(id);
54 return computePartition(id, partitionCount, workerCount, target);
55 }
56 }
57