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ByteArrayVertexIdData xref
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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.hadoop.io.WritableComparable;
22  
23  import java.io.DataInput;
24  import java.io.DataOutput;
25  import java.io.IOException;
26  
27  /**
28   * Stores pairs of vertex id and generic data in a single byte array
29   *
30   * @param <I> Vertex id
31   * @param <T> Data
32   */
33  public abstract class ByteArrayVertexIdData<I extends WritableComparable,
34      T> extends AbstractVertexIdData<I, T> {
35  
36    /**
37     * Get the underlying byte-array.
38     *
39     * @return The underlying byte-array
40     */
41    public byte[] getByteArray() {
42      return extendedDataOutput.getByteArray();
43    }
44  
45    @Override
46    public void write(DataOutput dataOutput) throws IOException {
47      WritableUtils.writeExtendedDataOutput(extendedDataOutput, dataOutput);
48    }
49  
50    @Override
51    public void readFields(DataInput dataInput) throws IOException {
52      extendedDataOutput =
53          WritableUtils.readExtendedDataOutput(dataInput, getConf());
54    }
55  }