/*
* 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.cf.taste.hadoop.slopeone;
import org.apache.hadoop.io.Writable;
import org.apache.mahout.cf.taste.impl.common.FullRunningAverageAndStdDev;
import org.apache.mahout.math.Varint;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
@Deprecated
final class FullRunningAverageAndStdDevWritable implements Writable {
private FullRunningAverageAndStdDev average;
FullRunningAverageAndStdDevWritable(FullRunningAverageAndStdDev average) {
this.average = average;
}
@Override
public String toString() {
return String.valueOf(average.getAverage())
+ '\t' + average.getCount() + '\t' + average.getMk() + '\t' + average.getSk();
}
@Override
public void write(DataOutput dataOutput) throws IOException {
Varint.writeUnsignedVarInt(average.getCount(), dataOutput);
dataOutput.writeDouble(average.getAverage());
dataOutput.writeDouble(average.getMk());
dataOutput.writeDouble(average.getSk());
}
@Override
public void readFields(DataInput dataInput) throws IOException {
int count = Varint.readUnsignedVarInt(dataInput);
double diff = dataInput.readDouble();
double mk = dataInput.readDouble();
double sk = dataInput.readDouble();
average = new FullRunningAverageAndStdDev(count, diff, mk, sk);
}
}