/*

  * 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.graph.partition;

 import java.io.DataInput;

 import java.io.DataOutput;

 import java.io.IOException;

 import org.apache.hadoop.io.WritableComparable;

 /**

  * Same as {@link PartitionStats}, but also includes the hint for range-based

  * partitioning.

  *

  * @param <I> Vertex index type

  */

 @SuppressWarnings("rawtypes")

 public class RangePartitionStats<I extends WritableComparable>

     extends PartitionStats {

   /** Can be null if no hint, otherwise a splitting hint */

   private RangeSplitHint<I> hint;

   /**

    * Get the range split hint (if any)

    *

    * @return Hint of how to split the range if desired, null otherwise

    */

   public RangeSplitHint<I> getRangeSplitHint() {

     return hint;

   }

   @Override

   public void readFields(DataInput input) throws IOException {

     super.readFields(input);

     boolean hintExists = input.readBoolean();

     if (hintExists) {

       hint = new RangeSplitHint<I>();

       hint.readFields(input);

     } else {

       hint = null;

     }

   }

   @Override

   public void write(DataOutput output) throws IOException {

     super.write(output);

     output.writeBoolean(hint != null);

     if (hint != null) {

       hint.write(output);

     }

   }

 }