GetStatementOptional (Eclipse RDF4J 4.2.4)

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 GetStatementOptional
```
Either supplies a statement matching the given pattern, or Optional.empty() otherwise.

Author:

Peter Ansell

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Optional<Statement>`	`get(Resource subject, IRI predicate, Value object, Resource... contexts)`	Either supplies a statement matching the given pattern, or `Optional.empty()` otherwise.

- Method Detail
  - get
```
Optional<Statement> get(Resource subject,
                        IRI predicate,
                        Value object,
                        Resource... contexts)
```
    Either supplies a statement matching the given pattern, or Optional.empty() otherwise.
    
    Parameters:
    
    subject - A Resource to be used to match to statements.
    
    predicate - An IRI to be used to match to statements.
    
    object - A Value to be used to match to statements.
    
    contexts - An array of context Resource objects, or left out (not null) to select from all contexts.
    
    Returns:
    
    An Optional either containing a single statement matching the pattern or Optional.empty() otherwise.