org.dashbuilder.dataset.engine.group

Class IntervalBuilderFixedDate

java.lang.Object

org.dashbuilder.dataset.engine.group.IntervalBuilderFixedDate

All Implemented Interfaces:

IntervalBuilder

public class IntervalBuilderFixedDate
extends Object
implements IntervalBuilder

Interval builder for date columns which generates a fixed number of intervals for a given interval size.

The only intervals sizes supported are: QUARTER, MONTH, DAY_OF_WEEK, HOUR, MINUTE & SECOND.

Constructor Summary

Constructors

Constructor and Description
IntervalBuilderFixedDate()

Method Summary

Modifier and Type	Method and Description
protected IntervalList	_build(ColumnGroup columnGroup)
IntervalList	build(DataColumn dataColumn) 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.
IntervalList	createIntervalList(ColumnGroup columnGroup)
String	join(List array, String separator)

Methods inherited from class java.lang.Object

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

Constructor Detail

IntervalBuilderFixedDate

public IntervalBuilderFixedDate()

Method Detail

build

public IntervalList build(DataSetHandler ctx,
                          ColumnGroup columnGroup)

Description copied from interface: IntervalBuilder

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

Specified by:

build in interface IntervalBuilder

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

public IntervalList build(DataColumn dataColumn)

Description copied from interface: IntervalBuilder

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

Specified by:

build in interface IntervalBuilder

Parameters:

dataColumn - The data set grouped column

Returns:

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

_build

protected IntervalList _build(ColumnGroup columnGroup)

createIntervalList

public IntervalList createIntervalList(ColumnGroup columnGroup)

join

public String join(List array,
                   String separator)