Interface GetStatementOptional

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 Details

    • 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.