org.swtchart.internal.compress

Class Compress

java.lang.Object

org.swtchart.internal.compress.Compress

All Implemented Interfaces:

ICompress

Direct Known Subclasses:

CompressBarSeries, CompressLineSeries, CompressScatterSeries

public abstract class Compress
extends Object
implements ICompress

A base class for compressor providing default implementations.

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	compressed the flag indicating whether the data is compressed
protected int[]	compressedIndexes the compressed series indexes
protected double[]	compressedXSeries the compressed X series
protected double[]	compressedYSeries the compressed Y series
protected CompressConfig	config the configuration for compressor
protected CompressConfig	prevConfig the previous configuration for compressor
protected int	previousXGridIndex the previous X grid index
protected int	previousYGridIndex the previous Y grid index
protected double	xLower the lower value of x range
protected double[]	xSeries the source X series to be compressed
protected double	xUpper the upper value of x range
protected double	yLower the lower value of y range
protected double[]	ySeries the source Y series to be compressed
protected double	yUpper the upper value of y range

Constructor Summary

Constructors

Constructor and Description
Compress()

Method Summary

Modifier and Type	Method and Description
protected abstract void	addNecessaryPlots(ArrayList<Double> xList, ArrayList<Double> yList, ArrayList<Integer> indexList) Adds the necessary plots.
protected void	addToList(ArrayList<Double> xList, ArrayList<Double> yList, ArrayList<Integer> indexList, double x, double y, int index) Adds the given coordinate to list.
boolean	compress(CompressConfig compressConfig) Ignores the points which are in the same grid as the previous point.
int[]	getCompressedIndexes() Gets the compressed series indexes
double[]	getCompressedXSeries() Gets the compressed X series
double[]	getCompressedYSeries() Gets the compressed Y series
protected boolean	isInSameGridAsPrevious(double x, double y) Checks if the given coordinate is in the same grid as previous.
void	setXSeries(double[] xSeries) Sets X series which have to be sorted.
void	setYSeries(double[] ySeries) sets the Y series

Methods inherited from class java.lang.Object

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

Field Detail

previousXGridIndex

protected int previousXGridIndex

the previous X grid index

previousYGridIndex

protected int previousYGridIndex

the previous Y grid index

config

protected CompressConfig config

the configuration for compressor

prevConfig

protected CompressConfig prevConfig

the previous configuration for compressor

compressed

protected boolean compressed

the flag indicating whether the data is compressed

xSeries

protected double[] xSeries

the source X series to be compressed

ySeries

protected double[] ySeries

the source Y series to be compressed

compressedXSeries

protected transient double[] compressedXSeries

the compressed X series

compressedYSeries

protected transient double[] compressedYSeries

the compressed Y series

compressedIndexes

protected transient int[] compressedIndexes

the compressed series indexes

xLower

protected double xLower

the lower value of x range

xUpper

protected double xUpper

the upper value of x range

yLower

protected double yLower

the lower value of y range

yUpper

protected double yUpper

the upper value of y range

Constructor Detail

Compress

public Compress()

Method Detail

setXSeries

public void setXSeries(double[] xSeries)

Description copied from interface: ICompress

Sets X series which have to be sorted.

Specified by:

setXSeries in interface ICompress

Parameters:

xSeries - the X series

setYSeries

public void setYSeries(double[] ySeries)

Description copied from interface: ICompress

sets the Y series

Specified by:

setYSeries in interface ICompress

Parameters:

ySeries - the Y series

getCompressedXSeries

public double[] getCompressedXSeries()

Description copied from interface: ICompress

Gets the compressed X series

Specified by:

getCompressedXSeries in interface ICompress

Returns:

the compressed X series

getCompressedYSeries

public double[] getCompressedYSeries()

Description copied from interface: ICompress

Gets the compressed Y series

Specified by:

getCompressedYSeries in interface ICompress

Returns:

the compressed Y series

getCompressedIndexes

public int[] getCompressedIndexes()

Description copied from interface: ICompress

Gets the compressed series indexes

Specified by:

getCompressedIndexes in interface ICompress

Returns:

the compressed series indexes

compress

public final boolean compress(CompressConfig compressConfig)

Description copied from interface: ICompress

Ignores the points which are in the same grid as the previous point.

Specified by:

compress in interface ICompress

Parameters:

compressConfig - the configuration for compression

Returns:

true if the compression succeeds

addNecessaryPlots

protected abstract void addNecessaryPlots(ArrayList<Double> xList,
                                          ArrayList<Double> yList,
                                          ArrayList<Integer> indexList)

Adds the necessary plots.

Parameters:

xList - the array in which x coordinate for necessary plot is stored

yList - the array in which y coordinate for necessary plot is stored

indexList - the array in which series index for necessary plot is stored

addToList

protected void addToList(ArrayList<Double> xList,
                         ArrayList<Double> yList,
                         ArrayList<Integer> indexList,
                         double x,
                         double y,
                         int index)

Adds the given coordinate to list.

Parameters:

xList - the list to store the X coordinate

yList - the list to store the Y coordinate

indexList - the list to store the series index

x - the X coordinate

y - the Y coordinate

index - the series index

isInSameGridAsPrevious

protected boolean isInSameGridAsPrevious(double x,
                                         double y)

Checks if the given coordinate is in the same grid as previous.

Parameters:

x - the X coordinate

y - the Y coordinate

Returns:

true if the given coordinate is in the same grid as previous