/**
* 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.mahout.clustering.streaming.mapreduce;
import org.apache.hadoop.io.Writable;
import org.apache.mahout.math.Centroid;
import org.apache.mahout.math.Vector;
import org.apache.mahout.math.VectorWritable;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
public class CentroidWritable implements Writable {
private Centroid centroid = null;
public CentroidWritable() {}
public CentroidWritable(Centroid centroid) {
this.centroid = centroid;
}
public Centroid getCentroid() {
return centroid;
}
@Override
public void write(DataOutput dataOutput) throws IOException {
dataOutput.writeInt(centroid.getIndex());
dataOutput.writeDouble(centroid.getWeight());
VectorWritable.writeVector(dataOutput, centroid.getVector());
}
@Override
public void readFields(DataInput dataInput) throws IOException {
if (centroid == null) {
centroid = read(dataInput);
return;
}
centroid.setIndex(dataInput.readInt());
centroid.setWeight(dataInput.readDouble());
centroid.assign(VectorWritable.readVector(dataInput));
}
public static Centroid read(DataInput dataInput) throws IOException {
int index = dataInput.readInt();
double weight = dataInput.readDouble();
Vector v = VectorWritable.readVector(dataInput);
return new Centroid(index, v, weight);
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof CentroidWritable)) {
return false;
}
CentroidWritable writable = (CentroidWritable) o;
return centroid.equals(writable.centroid);
}
@Override
public int hashCode() {
return centroid.hashCode();
}
@Override
public String toString() {
return centroid.toString();
}
}