EnumerationFunction (fdb-record-layer-core-pb3 2.10.164.0 API)

Type Parameters:

R - result type

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface EnumerationFunction<R>
```
Functional interface to allow implementors to provide use case-specific logic when permutations are enumerated by BaseMatcher.match(com.apple.foundationdb.record.query.plan.temp.matching.EnumerationFunction<R>). The magic logic then calls apply(com.apple.foundationdb.record.query.plan.temp.EnumeratingIterator<com.apple.foundationdb.record.query.plan.temp.CorrelationIdentifier>, java.util.List<com.apple.foundationdb.record.query.plan.temp.CorrelationIdentifier>) with an EnumeratingIterator for ordered aliases on this side and one stable non-violating ordering o the other side. The result of this method is an Iterable of the result type R.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Iterator<R>`	`apply(EnumeratingIterator<CorrelationIdentifier> iterator, List<CorrelationIdentifier> otherOrdered)`	Called directly or indirectly by matching logic in `BaseMatcher.match(com.apple.foundationdb.record.query.plan.temp.matching.EnumerationFunction<R>)` using an `EnumeratingIterator` for ordered aliases on this side and one stable non-violating ordering o the other side.

- Method Detail
  - apply
```
Iterator<R> apply(EnumeratingIterator<CorrelationIdentifier> iterator,
                  List<CorrelationIdentifier> otherOrdered)
```
    Called directly or indirectly by matching logic in BaseMatcher.match(com.apple.foundationdb.record.query.plan.temp.matching.EnumerationFunction<R>) using an EnumeratingIterator for ordered aliases on this side and one stable non-violating ordering o the other side. The result of this method is an Iterable of the result type R.
    
    Parameters:
    
    iterator - EnumeratingIterator over all possible non-violating possible orderings of aliases on this side
    
    otherOrdered - one possible non-violating ordering of aliases on the other side
    
    Returns:
    
    Iterable of type R