Package mondrian.rolap

Class RolapDimension

java.lang.Object

mondrian.olap.OlapElementBase

mondrian.olap.DimensionBase

mondrian.rolap.RolapDimension

All Implemented Interfaces:

Annotated, Dimension, OlapElement

Direct Known Subclasses:

RolapCubeDimension

class RolapDimension
extends DimensionBase

RolapDimension implements Dimensionfor a ROLAP database.

Topic: Dimension ordinals

RolapEvaluator needs each dimension to have an ordinal, so that it can store the evaluation context as an array of members.

A dimension may be either shared or private to a particular cube. The dimension object doesn't actually know which; Schema has a list of shared hierarchies (Schema.getSharedHierarchies()), and Cube has a list of dimensions (Cube.getDimensions()).

If a dimension is shared between several cubes, the Dimensionobjects which represent them may (or may not be) the same. (That's why there's no getCube() method.)

Furthermore, since members are created by a MemberReaderwhich belongs to the RolapHierarchy, you will the members will be the same too. For example, if you query [Product].[Beer] from the Sales and Warehouse cubes, you will get the same RolapMemberobject. (RolapSchema.mapSharedHierarchyToReader holds the mapping. I don't know whether it's still necessary.)

Since:

10 August, 2001

Author:

jhyde

Nested Class Summary

Nested classes/interfaces inherited from interface mondrian.olap.OlapElement

OlapElement.LocalizedProperty

Field Summary

Fields inherited from class mondrian.olap.DimensionBase

description, dimensionType, hierarchies, highCardinality, name, uniqueName

Fields inherited from class mondrian.olap.OlapElementBase

caption, visible

Fields inherited from interface mondrian.olap.Dimension

MEASURES_NAME, MEASURES_UNIQUE_NAME

Constructor Summary

Constructors

Constructor	Description
RolapDimension(Schema schema, String name, String caption, boolean visible, String description, DimensionType dimensionType, boolean highCardinality, Map<String,Annotation> annotationMap)
RolapDimension(RolapSchema schema, RolapCube cube, MondrianDef.Dimension xmlDimension, MondrianDef.CubeDimension xmlCubeDimension)	Creates a dimension from an XML definition.

Method Summary

Modifier and Type	Method	Description
Map<String,Annotation>	getAnnotationMap()	Returns a list of annotations.
Hierarchy	getHierarchy()	Returns the hierarchy of an expression.
protected org.apache.log4j.Logger	getLogger()
Schema	getSchema()	Returns the schema this dimension belongs to.
(package private) void	init(MondrianDef.CubeDimension xmlDimension)	Initializes a dimension within the context of a cube.
(package private) RolapHierarchy	newHierarchy(String subName, boolean hasAll, RolapHierarchy closureFor)	Creates a hierarchy.

Methods inherited from class mondrian.olap.DimensionBase

getDescription, getDimension, getDimensionType, getHierarchies, getName, getQualifiedName, getUniqueName, isHighCardinality, isMeasures, lookupChild

Methods inherited from class mondrian.olap.OlapElementBase

clone, computeHashCode, equals, equals, getCaption, getLocalized, hashCode, isVisible, setCaption, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface mondrian.olap.OlapElement

getCaption, getLocalized, isVisible

Constructor Detail

RolapDimension

RolapDimension(Schema schema,
               String name,
               String caption,
               boolean visible,
               String description,
               DimensionType dimensionType,
               boolean highCardinality,
               Map<String,Annotation> annotationMap)

RolapDimension

RolapDimension(RolapSchema schema,
               RolapCube cube,
               MondrianDef.Dimension xmlDimension,
               MondrianDef.CubeDimension xmlCubeDimension)

Creates a dimension from an XML definition.

Pre-condition:

schema != null

Method Detail

getLogger

protected org.apache.log4j.Logger getLogger()

Specified by:

getLogger in class OlapElementBase

init

void init(MondrianDef.CubeDimension xmlDimension)

Initializes a dimension within the context of a cube.

newHierarchy

RolapHierarchy newHierarchy(String subName,
                            boolean hasAll,
                            RolapHierarchy closureFor)

Creates a hierarchy.

Parameters:

subName - Name of this hierarchy.

hasAll - Whether hierarchy has an 'all' member

closureFor - Hierarchy for which the new hierarchy is a closure; null for regular hierarchies

Returns:

Hierarchy

getHierarchy

public Hierarchy getHierarchy()

Returns the hierarchy of an expression.

In this case, the expression is a dimension, so the hierarchy is the dimension's default hierarchy (its first).

Specified by:

getHierarchy in interface OlapElement

Overrides:

getHierarchy in class DimensionBase

getSchema

public Schema getSchema()

Description copied from interface: Dimension

Returns the schema this dimension belongs to.

getAnnotationMap

public Map<String,Annotation> getAnnotationMap()

Description copied from interface: Annotated

Returns a list of annotations.

The map may be empty, never null.

Returns:

Map from annotation name to annotations.