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    Interface IRdfJsSourceExtended

    interface IRdfJsSourceExtended {
        countQuads?: (
            subject?: Term,
            predicate?: Term,
            object?: Term,
            graph?: Term,
        ) => number | Promise<number>;
        features?: { quotedTripleFiltering?: boolean };
        matchBindings?: (
            bindingsFactory: BindingsFactory,
            subject: Term,
            predicate: Term,
            object: Term,
            graph: Term,
        ) => EventEmitter;
        match(
            subject?: null | Term,
            predicate?: null | Term,
            object?: null | Term,
            graph?: null | Term,
        ): Stream<Quad>;
    }

    Hierarchy

    • Source
      • IRdfJsSourceExtended
    Index

    Properties

    countQuads? features? matchBindings?

    Methods

    match

    Properties

    countQuads?: (
        subject?: Term,
        predicate?: Term,
        object?: Term,
        graph?: Term,
    ) => number | Promise<number>

    Return an estimated count of the number of quads matching the given pattern.

    The better the estimate, the better the query engine will be able to optimize the query.

    Type declaration

      • (
            subject?: Term,
            predicate?: Term,
            object?: Term,
            graph?: Term,
        ): number | Promise<number>

      • Parameters

        • Optionalsubject: Term

          An optional subject.

        • Optionalpredicate: Term

          An optional predicate.

        • Optionalobject: Term

          An optional object.

        • Optionalgraph: Term

          An optional graph.

        Returns number | Promise<number>

    features?: { quotedTripleFiltering?: boolean }

    A record indicating supported features of this source.

    Type declaration

    • OptionalquotedTripleFiltering?: boolean

      If true, this source supports passing quad patterns with quoted quad patterns in the match method. If false (or if features is undefined), such quoted quad patterns can not be passed, and must be replaced by undefined and filtered by the caller afterwards.

    matchBindings?: (
        bindingsFactory: BindingsFactory,
        subject: Term,
        predicate: Term,
        object: Term,
        graph: Term,
    ) => EventEmitter

    Returns a stream that produces all bindings matching the pattern.

    Type declaration

      • (
            bindingsFactory: BindingsFactory,
            subject: Term,
            predicate: Term,
            object: Term,
            graph: Term,
        ): EventEmitter

      • Parameters

        • bindingsFactory: BindingsFactory

          The factory that will be used to create bindings.

        • subject: Term

          The subject, which can be a variable.

        • predicate: Term

          The predicate, which can be a variable.

        • object: Term

          The object, which can be a variable.

        • graph: Term

          The graph, which can be a variable.

        Returns EventEmitter

    Methods

    • Returns a stream that processes all quads matching the pattern.

      Parameters

      • Optionalsubject: null | Term

        The optional subject.

      • Optionalpredicate: null | Term

        The optional predicate.

      • Optionalobject: null | Term

        The optional object.

      • Optionalgraph: null | Term

        The optional graph.

      Returns Stream<Quad>

      The resulting quad stream.

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