Package org.apache.calcite.util.mapping

Class Mappings.OverridingTargetMapping

java.lang.Object

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

org.apache.calcite.util.mapping.Mappings.OverridingTargetMapping

All Implemented Interfaces:

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

Enclosing class:

Mappings

public static class Mappings.OverridingTargetMapping
extends Mappings.AbstractMapping
implements Mappings.TargetMapping

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

Constructor Summary

Constructors

Constructor	Description
OverridingTargetMapping(Mappings.TargetMapping parent, int target, int source)

Method Summary

Modifier and Type	Method	Description
void	clear()	Removes all elements in the mapping.
MappingType	getMappingType()	Returns the mapping type.
int	getTarget(int source)	Returns the target that a source 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.
void	set(int source, int target)
int	size()	Returns the number of elements in the mapping.

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

getSource, getSourceCount, getSourceOpt, getTargetCount, getTargetOpt, 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.TargetMapping

getSourceCount, getSourceOpt, getTargetCount, getTargetOpt

Constructor Details

OverridingTargetMapping

public OverridingTargetMapping(Mappings.TargetMapping parent,
 int target,
 int source)

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

set

public void set(int source,
 int target)

Specified by:

set in interface Mappings.TargetMapping

Overrides:

set in class Mappings.AbstractMapping

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

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

getTarget

public int getTarget(int source)

Description copied from interface: Mappings.FunctionMapping

Returns the target that a source maps to.

Specified by:

getTarget in interface Mappings.FunctionMapping

Specified by:

getTarget in interface Mappings.TargetMapping

Overrides:

getTarget in class Mappings.AbstractMapping

Parameters:

source - source

Returns:

target

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