net.esper.view.stat.olap
Class CubeImpl

java.lang.Object
  net.esper.view.stat.olap.CubeImpl

All Implemented Interfaces:

Cube

public final class CubeImpl
extends Object
implements Cube

Cube implementation derives the cells of the cube from a measures list and a MultidimCube containing BaseStatisticsBean.

Constructor Summary

CubeImpl(MultidimCube<BaseStatisticsBean> cube, String[] measuresToDerive)
Constructor.

Method Summary

Dimension[]	getDimensions() Returns dimensions.
Cell[]	getMeasures() Returns all measures.
DimensionMember[]	getMembers(int ordinal) Returns the member value for each dimension that intersect to identify the cell of the given ordinal.
int	getOrdinal(DimensionMember[] members) Given the the members of each dimension that define the intersection, returns the ordinal of a measure.

Methods inherited from class java.lang.Object

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

Constructor Detail

CubeImpl

public CubeImpl(MultidimCube<BaseStatisticsBean> cube,
                String[] measuresToDerive)

Constructor. Takes a fact cube schema and a derivation strategy to be used when a measure cube needs to be derived.

Parameters:

cube - contains the fact cube and related into

measuresToDerive - a list of well-named measures to derive

Method Detail

getDimensions

public final Dimension[] getDimensions()

Description copied from interface: Cube

Returns dimensions. Implementations have at least 1 dimension and can be n-dimensional.

Specified by:

getDimensions in interface Cube

Returns:

dimension array

getMeasures

public final Cell[] getMeasures()

Description copied from interface: Cube

Returns all measures. Individual measures can be retrieved directly by indexing into the array of measures. A formual for calculating an ordinal for a 3-dimensional cube is as follows: ordinal = dimension[0].index + dimension[1].index * dimension[0].size + dimension[2].index * dimension[0].size * dimension[1].size;

Specified by:

getMeasures in interface Cube

Returns:

array of measures

getMembers

public final DimensionMember[] getMembers(int ordinal)

Description copied from interface: Cube

Returns the member value for each dimension that intersect to identify the cell of the given ordinal.

Specified by:

getMembers in interface Cube

Parameters:

ordinal - is the cell ordinal, starting at zero and with a max value of Cell[].length - 1.

Returns:

member values matching the number of dimensions that intersect to identify the cell

getOrdinal

public final int getOrdinal(DimensionMember[] members)

Description copied from interface: Cube

Given the the members of each dimension that define the intersection, returns the ordinal of a measure.

Specified by:

getOrdinal in interface Cube

Parameters:

members - is an array of members within each dimension that intersect and thus define the cell position

Returns:

ordinal starts at zero and ends at Cell[].length - 1. A -1 is returned if the intersection could not be determined, such as when a dimension member could not be located.