Class JenaGraph

    • Method Detail

      • openGraph

        protected JenaGraph.GraphConnection openGraph​(boolean forceReload)
        Gets the Jena graph using options.

        The Jena "Convenient" reification style is used when opening models: it allows to ignore reification quadlets when calling the statements list.

        Parameters:
        forceReload - boolean stating if the jena graph has to be reloaded using options
        Returns:
        the Jena graph (model)
      • getNamespaces

        public Map<String,​StringgetNamespaces()
        Description copied from interface: Graph
        Returns namespaces for the graph.

        Namespaces are prefix/namespace bindings, as rdf for http://www.w3.org/1999/02/22-rdf-syntax-ns#.

        Specified by:
        getNamespaces in interface Graph
        Returns:
        namespaces map of namespace bindings for the graph
      • add

        public void add​(Statement statement)
        Description copied from interface: Graph
        Adds the statement object to the graph.
        Specified by:
        add in interface Graph
        Parameters:
        statement - statement to add
      • add

        public void add​(List<Statement> statements)
        Description copied from interface: Graph
        Adds given list of Statement objects to the graph.
        Specified by:
        add in interface Graph
        Parameters:
        statements - list of Statement instances to add
      • remove

        public void remove​(Statement statement)
        Description copied from interface: Graph
        Removes the statement object from the graph.
        Specified by:
        remove in interface Graph
        Parameters:
        statement - statement to remove
      • remove

        public void remove​(List<Statement> statements)
        Description copied from interface: Graph
        Removes given list of Statement objects from the graph.
        Specified by:
        remove in interface Graph
        Parameters:
        statements - List of Statement instances to remove
      • getStatements

        public List<StatementgetStatements​(Node subject,
                                             Node predicate,
                                             Node object)
        Description copied from interface: Graph
        Returns all statements in the graph matching the pattern.
        Specified by:
        getStatements in interface Graph
        Returns:
        list of Statement instances matching the pattern
      • getStatements

        public List<StatementgetStatements​(Statement statement)
        Description copied from interface: Graph
        Returns all statements in the graph matching the pattern.
        Specified by:
        getStatements in interface Graph
        Parameters:
        statement - pattern to match, can hold null nodes as wildcards
        Returns:
        list of Statement instances matching the pattern
      • getSubjects

        public List<NodegetSubjects​(Node predicate,
                                      Node object)
        Description copied from interface: Graph
        Get items matching the statement pattern (null, predicate, object).
        Specified by:
        getSubjects in interface Graph
        Parameters:
        predicate - predicate pattern, null accepted
        object - object pattern, null accepted
        Returns:
        list of subjects
      • getPredicates

        public List<NodegetPredicates​(Node subject,
                                        Node object)
        Description copied from interface: Graph
        Gets items matching the statement pattern (subject, null, object).
        Specified by:
        getPredicates in interface Graph
        Parameters:
        subject - subject pattern, null accepted
        object - object pattern, null accepted
        Returns:
        list of predicates
      • getObjects

        public List<NodegetObjects​(Node subject,
                                     Node predicate)
        Description copied from interface: Graph
        Gets items matching the statement pattern (subject, predicate, null).
        Specified by:
        getObjects in interface Graph
        Parameters:
        subject - subject pattern, null accepted
        predicate - predicate pattern, null accepted
        Returns:
        list of node objects
      • hasStatement

        public boolean hasStatement​(Statement statement)
        Description copied from interface: Graph
        Returns true if given statement pattern is in the graph.
        Specified by:
        hasStatement in interface Graph
        Parameters:
        statement - statement pattern, can use null as wild cards
        Returns:
        true or false
      • hasResource

        public boolean hasResource​(Resource resource)
        Description copied from interface: Graph
        Returns true if given resource appears in any statement of the graph.
        Specified by:
        hasResource in interface Graph
        Returns:
        true or false
      • size

        public Long size()
        Returns the number of statements in the graph.

        XXX AT: this size may not be equal to the number of statements retrieved via getStatements() because it counts each statement property.

        Specified by:
        size in interface Graph
        Returns:
        integer number of statements in the graph
      • clear

        public void clear()
        Description copied from interface: Graph
        Clears the graph, removing all statements in it.
        Specified by:
        clear in interface Graph
      • query

        public QueryResult query​(String queryString,
                                 String language,
                                 String baseURI)
        Description copied from interface: Graph
        Query the graph using a base URI.
        Specified by:
        query in interface Graph
        Parameters:
        queryString - the query string
        language - the query language (sparql, rdql,...)
        baseURI - the base URI to use for query
        Returns:
        QueryResult instance
      • queryCount

        public int queryCount​(String queryString,
                              String language,
                              String baseURI)
        Description copied from interface: Graph
        Counts the number of results of a query.
        Specified by:
        queryCount in interface Graph
        Parameters:
        queryString - the query string
        language - the query language (sparql, rdql,...)
        baseURI - the base URI to use for query
        Returns:
        the count
      • read

        public boolean read​(InputStream in,
                            String lang,
                            String base)
        Description copied from interface: Graph
        Parses source into the graph.
        Specified by:
        read in interface Graph
        Parameters:
        in - input stream
        lang - format for the input serialization, may be "RDF/XML", "RDF/XML-ABBREV", "N-TRIPLE" and "N3". The default value, represented by null, is "RDF/XML".
        base - base uri to be used when converting relative uris to absolute uris, may be null. If set to "", allows relative uris to be used in the model.
        Returns:
        true on success, else false
      • read

        public boolean read​(String path,
                            String lang,
                            String base)
        Description copied from interface: Graph
        Parses source into the graph.
        Specified by:
        read in interface Graph
        Parameters:
        path - path on file system where to take the serialization file
        lang - format for the input serialization, may be "RDF/XML", "RDF/XML-ABBREV", "N-TRIPLE" and "N3". The default value, represented by null, is "RDF/XML".
        base - base uri to be used when converting relative uris to absolute uris, may be null. If set to "", allows relative uris to be used in the model.
        Returns:
        true on success, else false
      • write

        public boolean write​(OutputStream out,
                             String lang,
                             String base)
        Description copied from interface: Graph
        Serializes graph.
        Specified by:
        write in interface Graph
        Parameters:
        out - output stream
        lang - format for the input serialization, may be "RDF/XML", "RDF/XML-ABBREV", "N-TRIPLE" and "N3". The default value, represented by null, is "RDF/XML".
        base - base uri to be used when converting relative uris to absolute uris, may be null. If set to "", allows relative uris to be used in the model.
        Returns:
        true on success, else false
      • write

        public boolean write​(String path,
                             String lang,
                             String base)
        Description copied from interface: Graph
        Serializes graph.
        Specified by:
        write in interface Graph
        Parameters:
        path - path on file system where to put the serialization file
        lang - format for the input serialization, may be "RDF/XML", "RDF/XML-ABBREV", "N-TRIPLE" and "N3". The default value, represented by null, is "RDF/XML".
        base - base uri to be used when converting relative uris to absolute uris, may be null. If set to "", allows relative uris to be used in the model.
        Returns:
        true on success, else false