org.apache.lens.cube.metadata

Class DerivedCube

java.lang.Object

org.apache.lens.cube.metadata.AbstractCubeTable

org.apache.lens.cube.metadata.DerivedCube

All Implemented Interfaces:

CubeInterface, Named

public class DerivedCube
extends AbstractCubeTable
implements CubeInterface

Constructor Summary

Constructors

Constructor and Description
DerivedCube(String name, Set<String> measures, Set<String> dimensions, Cube parent)
DerivedCube(String name, Set<String> measures, Set<String> dimensions, Map<String,String> properties, double weight, Cube parent)
DerivedCube(org.apache.hadoop.hive.ql.metadata.Table tbl, Cube parent)

Method Summary

Methods

Modifier and Type	Method and Description
void	addDimension(String dimension) Add a new dimension
void	addMeasure(String measure) Add a new measure
void	addProperties()
boolean	allFieldsQueriable() Whether all the fields of cube can be queried.
boolean	equals(Object obj)
Set<String>	getAllFieldNames() Get all field names reachable from cube
JoinChain	getChainByName(String chainName) Get joinchain by given by name
CubeColumn	getColumnByName(String column) Get cube column given by column name.
CubeDimAttribute	getDimAttributeByName(String dimension) Get dimension attribute given by name
Set<String>	getDimAttributeNames() Get all dimension attribute names
Set<CubeDimAttribute>	getDimAttributes() Get all dimension attributes of the cube
static Set<String>	getDimensions(String name, Map<String,String> props)
ExprColumn	getExpressionByName(String exprName) Get expression by given by name
Set<String>	getExpressionNames() Get all expression names
Set<ExprColumn>	getExpressions() Get all expressions defined on the cube
Set<String>	getJoinChainNames() Get all join chain names
Set<JoinChain>	getJoinChains() Get all joinchains defined on the cube
CubeMeasure	getMeasureByName(String measure) Get measure by given by name
Set<String>	getMeasureNames() Get all measure names
Set<CubeMeasure>	getMeasures() Get all measures of the cube
static Set<String>	getMeasures(String name, Map<String,String> props)
Cube	getParent()
Set<String>	getStorages()
CubeTableType	getTableType()
Set<String>	getTimedDimensions() Get all timed dimensions of cube
int	hashCode()
boolean	isDerivedCube() Is the cube a derived cube or base cube
void	removeDimension(String dimName) Remove the dimension with name specified
void	removeMeasure(String msrName) Remove the measure with name specified
void	updateDimAttributeProperties()
void	updateMeasureProperties()
void	validate()

Methods inherited from class org.apache.lens.cube.metadata.AbstractCubeTable

addProperties, alterWeight, getColumns, getName, getProperties, getWeight, removeProperty, toString, weight

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.lens.cube.metadata.Named

getName

Constructor Detail

DerivedCube

public DerivedCube(String name,
           Set<String> measures,
           Set<String> dimensions,
           Cube parent)
            throws LensException

Throws:

LensException

DerivedCube

public DerivedCube(String name,
           Set<String> measures,
           Set<String> dimensions,
           Map<String,String> properties,
           double weight,
           Cube parent)
            throws LensException

Throws:

LensException

DerivedCube

public DerivedCube(org.apache.hadoop.hive.ql.metadata.Table tbl,
           Cube parent)

Method Detail

validate

public void validate()
              throws LensException

Throws:

LensException

getMeasures

public Set<CubeMeasure> getMeasures()

Description copied from interface: CubeInterface

Get all measures of the cube

Specified by:

getMeasures in interface CubeInterface

Returns:

set of CubeMeasure

getDimAttributes

public Set<CubeDimAttribute> getDimAttributes()

Description copied from interface: CubeInterface

Get all dimension attributes of the cube

Specified by:

getDimAttributes in interface CubeInterface

Returns:

set CubeDimAttribute

getTableType

public CubeTableType getTableType()

Specified by:

getTableType in class AbstractCubeTable

getStorages

public Set<String> getStorages()

Specified by:

getStorages in class AbstractCubeTable

addProperties

public void addProperties()

updateDimAttributeProperties

public void updateDimAttributeProperties()

updateMeasureProperties

public void updateMeasureProperties()

getMeasures

public static Set<String> getMeasures(String name,
                      Map<String,String> props)

getTimedDimensions

public Set<String> getTimedDimensions()

Description copied from interface: CubeInterface

Get all timed dimensions of cube

Specified by:

getTimedDimensions in interface CubeInterface

Returns:

Set of strings

getDimensions

public static Set<String> getDimensions(String name,
                        Map<String,String> props)

getParent

public Cube getParent()

hashCode

public int hashCode()

Overrides:

hashCode in class AbstractCubeTable

equals

public boolean equals(Object obj)

Overrides:

equals in class AbstractCubeTable

getDimAttributeByName

public CubeDimAttribute getDimAttributeByName(String dimension)

Description copied from interface: CubeInterface

Get dimension attribute given by name

Specified by:

getDimAttributeByName in interface CubeInterface

Parameters:

dimension - dimension attribute name

Returns:

A CubeDimAttribute object

getMeasureByName

public CubeMeasure getMeasureByName(String measure)

Description copied from interface: CubeInterface

Get measure by given by name

Specified by:

getMeasureByName in interface CubeInterface

Parameters:

measure - Measure name

Returns:

A CubeMeasure object

getColumnByName

public CubeColumn getColumnByName(String column)

Description copied from interface: CubeInterface

Get cube column given by column name.

It can be a measure, dimension attribute or an expression.

Specified by:

getColumnByName in interface CubeInterface

Parameters:

column - Column name

Returns:

A CubeColumn object

addMeasure

public void addMeasure(String measure)

Add a new measure

Parameters:

measure - measure name

addDimension

public void addDimension(String dimension)

Add a new dimension

Parameters:

dimension - attribute name

removeDimension

public void removeDimension(String dimName)

Remove the dimension with name specified

Parameters:

dimName -

removeMeasure

public void removeMeasure(String msrName)

Remove the measure with name specified

Parameters:

msrName -

isDerivedCube

public boolean isDerivedCube()

Description copied from interface: CubeInterface

Is the cube a derived cube or base cube

Specified by:

isDerivedCube in interface CubeInterface

Returns:

true if cube is derived, false if it is base

getMeasureNames

public Set<String> getMeasureNames()

Description copied from interface: CubeInterface

Get all measure names

Specified by:

getMeasureNames in interface CubeInterface

Returns:

Set of strings

getDimAttributeNames

public Set<String> getDimAttributeNames()

Description copied from interface: CubeInterface

Get all dimension attribute names

Specified by:

getDimAttributeNames in interface CubeInterface

Returns:

Set of strings

allFieldsQueriable

public boolean allFieldsQueriable()

Description copied from interface: CubeInterface

Whether all the fields of cube can be queried.

If false, the fields can queried through derived cubes. Users can look at derived cube fields to know which all fields can be queried together.

If true, all the fields can be directly queried.

Specified by:

allFieldsQueriable in interface CubeInterface

Returns:

true or false

getExpressions

public Set<ExprColumn> getExpressions()

Description copied from interface: CubeInterface

Get all expressions defined on the cube

Specified by:

getExpressions in interface CubeInterface

Returns:

set ExprColumn

getExpressionByName

public ExprColumn getExpressionByName(String exprName)

Description copied from interface: CubeInterface

Get expression by given by name

Specified by:

getExpressionByName in interface CubeInterface

Parameters:

exprName - Expression name

Returns:

A ExprColumn object

getAllFieldNames

public Set<String> getAllFieldNames()

Description copied from interface: CubeInterface

Get all field names reachable from cube

Specified by:

getAllFieldNames in interface CubeInterface

Overrides:

getAllFieldNames in class AbstractCubeTable

Returns:

Set of strings

getExpressionNames

public Set<String> getExpressionNames()

Description copied from interface: CubeInterface

Get all expression names

Specified by:

getExpressionNames in interface CubeInterface

Returns:

Set of strings

getJoinChains

public Set<JoinChain> getJoinChains()

Description copied from interface: CubeInterface

Get all joinchains defined on the cube

Specified by:

getJoinChains in interface CubeInterface

Returns:

set JoinChain

getChainByName

public JoinChain getChainByName(String chainName)

Description copied from interface: CubeInterface

Get joinchain by given by name

Specified by:

getChainByName in interface CubeInterface

Parameters:

chainName - Chain name

Returns:

A JoinChain object

getJoinChainNames

public Set<String> getJoinChainNames()

Description copied from interface: CubeInterface

Get all join chain names

Specified by:

getJoinChainNames in interface CubeInterface

Returns:

Set of strings