Mappings.SourceMapping (Apache Calcite API)

All Superinterfaces:

java.lang.Iterable<IntPair>, Mappings.CoreMapping

All Known Subinterfaces:

Mapping

All Known Implementing Classes:

AbstractSourceMapping, AbstractTargetMapping, Mappings.AbstractMapping, Mappings.FiniteAbstractMapping, Mappings.IdentityMapping, Mappings.InverseMapping, Mappings.OverridingSourceMapping, Mappings.OverridingTargetMapping, Mappings.PartialFunctionImpl, Mappings.PartialMapping, Mappings.SurjectionWithInverse, 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

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	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 java.lang.Iterable
forEach, iterator, spliterator

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

- 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()
```