Interface Graph

  • All Superinterfaces:
    Serializable
    All Known Implementing Classes:
    CoreGraph, JenaGraph

    public interface Graph
    extends Serializable
    Interface for graphs.

    New types of graphs will be registered using extension points.

    Graphs have to be serializable has they will be kept as references in the RelationService bean.

    Author:
    Anahide Tchertchian
    • Method Detail

      • getNamespaces

        Map<String,​StringgetNamespaces()
        Returns namespaces for the graph.

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

        Returns:
        namespaces map of namespace bindings for the graph
      • add

        void add​(Statement statement)
        Adds the statement object to the graph.
        Parameters:
        statement - statement to add
        Since:
        5.5
      • add

        void add​(List<Statement> statements)
        Adds given list of Statement objects to the graph.
        Parameters:
        statements - list of Statement instances to add
      • remove

        void remove​(Statement statement)
        Removes the statement object from the graph.
        Parameters:
        statement - statement to remove
        Since:
        5.5
      • remove

        void remove​(List<Statement> statements)
        Removes given list of Statement objects from the graph.
        Parameters:
        statements - List of Statement instances to remove
      • getStatements

        List<StatementgetStatements​(Statement statement)
        Returns all statements in the graph matching the pattern.
        Parameters:
        statement - pattern to match, can hold null nodes as wildcards
        Returns:
        list of Statement instances matching the pattern
      • getStatements

        List<StatementgetStatements​(Node subject,
                                      Node predicate,
                                      Node object)
        Returns all statements in the graph matching the pattern.
        Returns:
        list of Statement instances matching the pattern
        Since:
        5.5
      • getSubjects

        List<NodegetSubjects​(Node predicate,
                               Node object)
        Get items matching the statement pattern (null, predicate, object).
        Parameters:
        predicate - predicate pattern, null accepted
        object - object pattern, null accepted
        Returns:
        list of subjects
      • getPredicates

        List<NodegetPredicates​(Node subject,
                                 Node object)
        Gets items matching the statement pattern (subject, null, object).
        Parameters:
        subject - subject pattern, null accepted
        object - object pattern, null accepted
        Returns:
        list of predicates
      • getObjects

        List<NodegetObjects​(Node subject,
                              Node predicate)
        Gets items matching the statement pattern (subject, predicate, null).
        Parameters:
        subject - subject pattern, null accepted
        predicate - predicate pattern, null accepted
        Returns:
        list of node objects
      • hasStatement

        boolean hasStatement​(Statement statement)
        Returns true if given statement pattern is in the graph.
        Parameters:
        statement - statement pattern, can use null as wild cards
        Returns:
        true or false
      • hasResource

        boolean hasResource​(Resource resource)
        Returns true if given resource appears in any statement of the graph.
        Returns:
        true or false
      • size

        Long size()
        Returns the number of statements in the graph.
        Returns:
        number of statements as a Long
      • clear

        void clear()
        Clears the graph, removing all statements in it.
      • query

        QueryResult query​(String queryString,
                          String language,
                          String baseURI)
        Query the graph using a base URI.
        Parameters:
        queryString - the query string
        language - the query language (sparql, rdql,...)
        baseURI - the base URI to use for query
        Returns:
        QueryResult instance
      • queryCount

        int queryCount​(String queryString,
                       String language,
                       String baseURI)
        Counts the number of results of a query.
        Parameters:
        queryString - the query string
        language - the query language (sparql, rdql,...)
        baseURI - the base URI to use for query
        Returns:
        the count
      • read

        boolean read​(String path,
                     String lang,
                     String base)
        Parses source into the 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
      • read

        boolean read​(InputStream in,
                     String lang,
                     String base)
        Parses source into the 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
      • write

        boolean write​(String path,
                      String lang,
                      String base)
        Serializes 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
      • write

        boolean write​(OutputStream out,
                      String lang,
                      String base)
        Serializes 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