org.dashbuilder.dataset.engine.group

Interface IntervalBuilder

All Known Implementing Classes:

IntervalBuilderDynamicLabel, IntervalBuilderFixedDate

public interface IntervalBuilder

Group operations requires to split the values of a column into intervals. This interface provides an abstraction for the different group strategy implementations.

Method Summary

Modifier and Type	Method and Description
IntervalList	build(DataColumn groupedColumn) Build a list of intervals according to the column group settings.
IntervalList	build(DataSetHandler ctx, ColumnGroup columnGroup) Build a list of intervals according to the column group settings.

Method Detail

build

IntervalList build(DataSetHandler ctx,
                   ColumnGroup columnGroup)

Build a list of intervals according to the column group settings. The resulting intervals contain the row references belonging to it.

Parameters:

ctx - The current operation engine data set handler context.

columnGroup - The column group operation to apply.

Returns:

A list of intervals containing a split of all the values for the given column.

build

IntervalList build(DataColumn groupedColumn)

Build a list of intervals according to the column group settings. The resulting intervals are empty (no row references in).

Parameters:

groupedColumn - The data set grouped column

Returns:

A list of intervals containing a split of all the values for the given column.