/*
* 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.flink.api.common.distributions;
import java.io.IOException;
import org.apache.flink.core.memory.DataInputView;
import org.apache.flink.core.memory.DataOutputView;
import org.apache.flink.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(DataOutputView out) throws IOException {
out.writeDouble(min);
out.writeDouble(max);
}
@Override
public void read(DataInputView in) throws IOException {
min = in.readDouble();
max = in.readDouble();
}
}