options.py 文件源码

def add_triples(self, msg, top_class, info_class, context, node) :
        """
        Add an error structure to the processor graph: a bnode with a number of predicates. The structure
        follows U{the processor graph vocabulary<http://www.w3.org/2010/02/rdfa/wiki/Processor_Graph_Vocabulary>} as described
        on the RDFa WG Wiki page.

        @param msg: the core error message, added as an object to a dc:description
        @param top_class: Error, Warning, or Info; an explicit rdf:type added to the bnode
        @type top_class: URIRef
        @param info_class: An additional error class, added as an rdf:type to the bnode in case it is not None
        @type info_class: URIRef
        @param context: An additional information added, if not None, as an object with rdfa:context as a predicate
        @type context: either an URIRef or a URI String (an URIRef will be created in the second case)
        @param node: The node's element name that contains the error
        @type node: string
        @return: the bnode that serves as a subject for the errors. The caller may add additional information
        @rtype: BNode
        """
        # Lazy binding of relevant prefixes
        self.graph.bind("dcterms", ns_dc)
        self.graph.bind("pyrdfa",  ns_distill)
        self.graph.bind("rdf",     ns_rdf)
        self.graph.bind("rdfa",    ns_rdfa)
        self.graph.bind("ht",      ns_ht)
        self.graph.bind("xsd",     ns_xsd)
        # Python 3 foolproof way
        try :
            is_context_string = isinstance(context, basestring)
        except :
            is_context_string = isinstance(context, str)

        bnode = BNode()

        if node != None:
            try :
                full_msg = "[In element '%s'] %s" % (node.nodeName, msg)
            except :
                full_msg = "[In element '%s'] %s" % (node, msg)
        else :
            full_msg = msg

        self.graph.add((bnode, ns_rdf["type"], top_class))
        if info_class :
            self.graph.add((bnode, ns_rdf["type"], info_class))
        self.graph.add((bnode, ns_dc["description"], Literal(full_msg)))
        self.graph.add((bnode, ns_dc["date"], Literal(datetime.datetime.utcnow().isoformat(),datatype=ns_xsd["dateTime"])))
        if context and (isinstance(context,URIRef) or is_context_string):
            htbnode = BNode()
            self.graph.add( (bnode,   ns_rdfa["context"],htbnode) )
            self.graph.add( (htbnode, ns_rdf["type"], ns_ht["Request"]) )
            self.graph.add( (htbnode, ns_ht["requestURI"], Literal("%s" % context)) )
        return bnode