eu.bengreen.data.utility

Class DownSampleImpl

java.lang.Object

eu.bengreen.data.utility.DownSampleImpl

All Implemented Interfaces:

DownSampler

Direct Known Subclasses:

LargestTriangleThreeBuckets, LargestTriangleThreeBucketsTime

public abstract class DownSampleImpl
extends Object
implements DownSampler

Naive implementation of down sample with simple array input Largest-Triangle-Three-Buckets, from Sveinn Steinarsson's thesis, section 4.2..

Author:

Benjamin Green

Nested Class Summary

Nested classes/interfaces inherited from interface org.rrd4j.graph.DownSampler

DownSampler.DataSet

Field Summary

Fields

Modifier and Type	Field and Description
protected int	threshold

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	DownSampleImpl(int threshold)

Method Summary

Modifier and Type	Method and Description
DownSampler.DataSet	downsize(long[] timestamps, double[] values)
protected abstract DownSampler.DataSet	downsizeImpl(DownSampler.DataSet sampled, long[] timestamps, double[] values)
protected void	setDataSetLine(DownSampler.DataSet sampled, int rank, long timestamp, double value)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

threshold

protected final int threshold

Constructor Detail

DownSampleImpl

protected DownSampleImpl(int threshold)

Method Detail

setDataSetLine

protected void setDataSetLine(DownSampler.DataSet sampled,
                              int rank,
                              long timestamp,
                              double value)

downsize

public DownSampler.DataSet downsize(long[] timestamps,
                                    double[] values)

Specified by:

downsize in interface DownSampler

downsizeImpl

protected abstract DownSampler.DataSet downsizeImpl(DownSampler.DataSet sampled,
                                                    long[] timestamps,
                                                    double[] values)