/***********************************************************************************************************************
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* Licensed 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 eu.stratosphere.api.common.distributions;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import eu.stratosphere.types.DoubleValue;
public class UniformDoubleDistribution implements DataDistribution {
private static final long serialVersionUID = 1L;
private double min, max;
public UniformDoubleDistribution() {}
public UniformDoubleDistribution(double min, double max) {
this.min = min;
this.max = max;
}
@Override
public DoubleValue[] getBucketBoundary(int bucketNum, int totalNumBuckets) {
double bucketSize = (max - min) / totalNumBuckets;
return new DoubleValue[] {new DoubleValue(min + (bucketNum+1) * bucketSize) };
}
@Override
public int getNumberOfFields() {
return 1;
}
@Override
public void write(DataOutput out) throws IOException {
out.writeDouble(min);
out.writeDouble(max);
}
@Override
public void read(DataInput in) throws IOException {
min = in.readDouble();
max = in.readDouble();
}
}