org.apache.calcite.util.mapping

Interface Mappings.SourceMapping

All Superinterfaces:

Iterable<IntPair>, Mappings.CoreMapping

All Known Subinterfaces:

Mapping

All Known Implementing Classes:

AbstractSourceMapping, AbstractTargetMapping, Mappings.AbstractMapping, Mappings.FiniteAbstractMapping, Mappings.IdentityMapping, Mappings.OverridingSourceMapping, Mappings.OverridingTargetMapping, Mappings.PartialMapping, Permutation

Enclosing class:

Mappings

public static interface Mappings.SourceMapping
extends Mappings.CoreMapping

Mapping suitable for sourcing columns.

Properties:

• It has a finite number of sources and targets
• Each target has exactly one source
• Each source has at most one target

TODO: figure out which interfaces this should extend

Method Summary

Methods

Modifier and Type	Method and Description
MappingType	getMappingType() Returns the mapping type.
int	getSource(int target)
int	getSourceCount()
int	getSourceOpt(int target)
int	getTargetCount()
int	getTargetOpt(int source)
Mapping	inverse()
boolean	isIdentity()

Methods inherited from interface org.apache.calcite.util.mapping.Mappings.CoreMapping

size

Methods inherited from interface java.lang.Iterable

iterator

Method Detail

getSourceCount

int getSourceCount()

getSource

int getSource(int target)

getSourceOpt

int getSourceOpt(int target)

getTargetCount

int getTargetCount()

getTargetOpt

int getTargetOpt(int source)

getMappingType

MappingType getMappingType()

Description copied from interface: Mappings.CoreMapping

Returns the mapping type.

Specified by:

getMappingType in interface Mappings.CoreMapping

Returns:

Mapping type

isIdentity

boolean isIdentity()

inverse

Mapping inverse()