Class UnionSailDataset

    • Method Detail

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object
      • close

        public void close()
                   throws SailException
        Description copied from interface: SailDataset
        Called when this SailDataset is no longer is used, such as when a read operation is complete. An isolation level compatible with IsolationLevels.SNAPSHOT will ensure the state of this SailDataset dose not change between the first call to this object until SailClosable#release() is called.
        Specified by:
        close in interface java.lang.AutoCloseable
        Specified by:
        close in interface SailClosable
        Specified by:
        close in interface SailDataset
        Throws:
        SailException - if this resource cannot be closed
      • getNamespace

        public java.lang.String getNamespace​(java.lang.String prefix)
                                      throws SailException
        Description copied from interface: SailDataset
        Gets the namespace that is associated with the specified prefix, if any.
        Specified by:
        getNamespace in interface SailDataset
        Parameters:
        prefix - A namespace prefix, or an empty string in case of the default namespace.
        Returns:
        The namespace name that is associated with the specified prefix, or null if there is no such namespace.
        Throws:
        SailException - If this object encountered an error or unexpected situation internally.
      • getStatements

        public CloseableIteration<? extends Statement,​SailException> getStatements​(Resource subj,
                                                                                         IRI pred,
                                                                                         Value obj,
                                                                                         Resource... contexts)
                                                                                  throws SailException
        Description copied from interface: SailDataset
        Gets all statements that have a specific subject, predicate and/or object. All three parameters may be null to indicate wildcards. Optionally a (set of) context(s) may be specified in which case the result will be restricted to statements matching one or more of the specified contexts.
        Specified by:
        getStatements in interface SailDataset
        Parameters:
        subj - A Resource specifying the subject, or null for a wildcard.
        pred - A IRI specifying the predicate, or null for a wildcard.
        obj - A Value specifying the object, or null for a wildcard.
        contexts - The context(s) to get the statements from. Note that this parameter is a vararg and as such is optional. If no contexts are supplied the method operates on all contexts.
        Returns:
        An iterator over the relevant statements.
        Throws:
        SailException - If the triple source failed to get the statements.
      • getTriples

        public CloseableIteration<? extends Triple,​SailException> getTriples​(Resource subj,
                                                                                   IRI pred,
                                                                                   Value obj)
                                                                            throws SailException
        Description copied from interface: SailDataset
        Gets all RDF-star triples that have a specific subject, predicate and/or object. All three parameters may be null to indicate wildcards.
        Specified by:
        getTriples in interface SailDataset
        Parameters:
        subj - A Resource specifying the subject, or null for a wildcard.
        pred - A IRI specifying the predicate, or null for a wildcard.
        obj - A Value specifying the object, or null for a wildcard.
        Returns:
        An iterator over the relevant triples.
        Throws:
        SailException - If the triple source failed to get the RDF-star triples.