ilog.views.chart.datax

Interface IlvDataColumnInfo

All Superinterfaces:

Cloneable, IlvStaticColumnInfo

All Known Subinterfaces:

IlvComputedColumnInfo, IlvComputedColumnInfo, IlvComputedColumnInfo, IlvComputedColumnInfo, IlvComputedColumnInfo

All Known Implementing Classes:

IlvAbstractDataColumnInfo, IlvDefaultDataColumnInfo

public interface IlvDataColumnInfo
extends IlvStaticColumnInfo

This interface describes metainformation of a table column. This metainformation may depend dynamically on the table data.

Since:

JViews 7.5

See Also:

IlvAbstractDataColumnInfo, IlvDefaultDataColumnInfo

Method Summary

Modifier and Type	Method and Description
void	addDataColumnListener(DataColumnListener listener) Adds a listener.
Object	getEmptyValue() Returns the replacement value when a record has no value for this column.
List	getEnumValues() Returns the list of possible values if this column is enumerated.
Object	getMaxValue() Returns the theoretical maximum value of this column.
Object	getMinValue() Returns the theoretical minimum value of this column.
boolean	isEnumerated() Returns true if this column stores enumerated values, meaning that there are only a few possible values.
void	removeDataColumnListener(DataColumnListener listener) Removes a listener.

Methods inherited from interface ilog.views.chart.datax.IlvStaticColumnInfo

clone, getName, getType

Method Detail

getEmptyValue

Object getEmptyValue()

Returns the replacement value when a record has no value for this column.

Returns:

A non-null object belonging to the getType() class.

isEnumerated

boolean isEnumerated()

Returns true if this column stores enumerated values, meaning that there are only a few possible values.

getEnumValues

List getEnumValues()

Returns the list of possible values if this column is enumerated.

Returns:

An unmodifiable list of non-null objects, each one belonging to the getType() class, or null if the possible values are not fixed but depend on the contents of the model, or null if isEnumerated() is false.

getMinValue

Object getMinValue()

Returns the theoretical minimum value of this column.

Returns:

A non-null object belonging to the getType() class, or null when there is no theoretical minimum.

getMaxValue

Object getMaxValue()

Returns the theoretical maximum value of this column.

Returns:

A non-null object belonging to the getType() class, or null when there is no theoretical maximum.

addDataColumnListener

void addDataColumnListener(DataColumnListener listener)

Adds a listener. It will be notified each time a change in this metainformation column occurs.

removeDataColumnListener

void removeDataColumnListener(DataColumnListener listener)

Removes a listener. Unregisters the given listener from the notification list.