Package org.apache.calcite.util.mapping

Class Mappings.OverridingSourceMapping

java.lang.Object

org.apache.calcite.util.mapping.Mappings.AbstractMapping

org.apache.calcite.util.mapping.Mappings.OverridingSourceMapping

All Implemented Interfaces:

Iterable<IntPair>, Mapping, Mappings.CoreMapping, Mappings.FunctionMapping, Mappings.SourceMapping, Mappings.TargetMapping

Enclosing class:

Mappings

public static class Mappings.OverridingSourceMapping
extends Mappings.AbstractMapping
implements Mappings.SourceMapping

Source mapping that returns the same result as a parent Mappings.SourceMapping except for specific overriding elements.

Constructor Summary

Constructors

Constructor	Description
OverridingSourceMapping(Mappings.SourceMapping parent, int source, int target)

Method Summary

Modifier and Type	Method	Description
void	clear()	Removes all elements in the mapping.
MappingType	getMappingType()	Returns the mapping type.
int	getSource(int target)	Returns the source that a target maps to.
Mapping	inverse()
boolean	isIdentity()	Returns whether this mapping is the identity.
Iterator<IntPair>	iterator()	Returns an iterator over the elements in this mapping.
int	size()	Returns the number of elements in the mapping.

Methods inherited from class org.apache.calcite.util.mapping.Mappings.AbstractMapping

getSourceCount, getSourceOpt, getTarget, getTargetCount, getTargetOpt, set, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

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

getSourceOpt, getTargetOpt

Constructor Details

OverridingSourceMapping

public OverridingSourceMapping(Mappings.SourceMapping parent,
 int source,
 int target)

Method Details

clear

public void clear()

Description copied from interface: Mapping

Removes all elements in the mapping.

Specified by:

clear in interface Mapping

size

public int size()

Description copied from interface: Mappings.CoreMapping

Returns the number of elements in the mapping.

Specified by:

size in interface Mapping

Specified by:

size in interface Mappings.CoreMapping

inverse

public Mapping inverse()

Specified by:

inverse in interface Mappings.SourceMapping

Specified by:

inverse in interface Mappings.TargetMapping

getMappingType

public MappingType getMappingType()

Description copied from interface: Mappings.CoreMapping

Returns the mapping type.

Specified by:

getMappingType in interface Mapping

Specified by:

getMappingType in interface Mappings.CoreMapping

Specified by:

getMappingType in interface Mappings.FunctionMapping

Specified by:

getMappingType in interface Mappings.SourceMapping

Returns:

Mapping type

getSource

public int getSource(int target)

Description copied from interface: Mappings.SourceMapping

Returns the source that a target maps to.

Specified by:

getSource in interface Mappings.SourceMapping

Overrides:

getSource in class Mappings.AbstractMapping

Parameters:

target - target

Returns:

source

isIdentity

public boolean isIdentity()

Description copied from interface: Mapping

Returns whether this mapping is the identity.

Specified by:

isIdentity in interface Mapping

Specified by:

isIdentity in interface Mappings.SourceMapping

Overrides:

isIdentity in class Mappings.AbstractMapping

iterator

public Iterator<IntPair> iterator()

Description copied from interface: Mapping

Returns an iterator over the elements in this mapping.

This method is optional; implementations may throw UnsupportedOperationException.

Specified by:

iterator in interface Iterable<IntPair>

Specified by:

iterator in interface Mapping