com.approximatrix.charting.model
Class DefaultChartDataModelConstraints

java.lang.Object
  com.approximatrix.charting.model.DefaultChartDataModelConstraints

All Implemented Interfaces:

ChartDataModelConstraints

public class DefaultChartDataModelConstraints
extends java.lang.Object
implements ChartDataModelConstraints

Implementing the ChartDataModelConstraints this class provides the default implementation for the data model constraints. Alternative implementations could return the sum of all column values to implement stacked bar charts e.g.

Author:

smueller

Field Summary

protected boolean	allowManualColScale A flag which determines if column values should be manually scalable.
protected int	axis The axis to compute the constraints.
protected AbstractChartDataModel	model The model for which to calculate the constraints.

Constructor Summary

DefaultChartDataModelConstraints(AbstractChartDataModel model, int axis)
Creates a new instance of DefaultChartDataModelConstraints

DefaultChartDataModelConstraints(AbstractChartDataModel model, int axis, boolean allowManualColScale)
Creates a new instance of DefaultChartDataModelConstraints

Method Summary

double	getMaximumColumnValue() Returns the maximum column value.
java.lang.Number	getMaximumValue() Returns the maximum value of all datasets.
double	getMinimumColumnValue() Returns the minimum column value.
java.lang.Number	getMinimumValue() Returns the minimum value of all datasets.

Methods inherited from class java.lang.Object

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

Field Detail

model

protected AbstractChartDataModel model

The model for which to calculate the constraints.

axis

protected int axis

The axis to compute the constraints.

allowManualColScale

protected boolean allowManualColScale

A flag which determines if column values should be manually scalable.

Constructor Detail

DefaultChartDataModelConstraints

public DefaultChartDataModelConstraints(AbstractChartDataModel model,
                                        int axis)

Creates a new instance of DefaultChartDataModelConstraints

DefaultChartDataModelConstraints

public DefaultChartDataModelConstraints(AbstractChartDataModel model,
                                        int axis,
                                        boolean allowManualColScale)

Creates a new instance of DefaultChartDataModelConstraints

Parameters:

model - the AbstractDataModel for which constraints will be computed

axis - the y-axis which will be considered

allowManualScale - a flag which triggers if column values should be allowed to be scaled manually (default is yes)

Method Detail

getMaximumValue

public java.lang.Number getMaximumValue()

Returns the maximum value of all datasets.

Specified by:

getMaximumValue in interface ChartDataModelConstraints

Returns:

a Number object defining the maximum value

getMinimumValue

public java.lang.Number getMinimumValue()

Returns the minimum value of all datasets.

Specified by:

getMinimumValue in interface ChartDataModelConstraints

Returns:

a Number object defining the smallest value.

getMinimumColumnValue

public double getMinimumColumnValue()

Returns the minimum column value.

Specified by:

getMinimumColumnValue in interface ChartDataModelConstraints

Returns:

In the case of non-numeric x-values this should be 0, in the case of numeric x-values this should nomen est omen be the smallest value.

Throws:

java.lang.ArrayIndexOutOfBoundsException - if the Model is empty

getMaximumColumnValue

public double getMaximumColumnValue()

Returns the maximum column value.

Specified by:

getMaximumColumnValue in interface ChartDataModelConstraints

Returns:

In the case of non-numeric x-values this should be the amount of columns - 1, in the case of numeric x-values this should nomen est omen be the smallest value.

Throws:

java.lang.ArrayIndexOutOfBoundsException - if the model is empty