Package org.apache.jena.enhanced

Class EnhGraph

  • Direct Known Subclasses:
    ModelCom
    public class EnhGraph
extends java.lang.Object
    EnhGraph wraps a plain graph and contains enhanced nodes that wrap the plain nodes of the plain graph. All the enhanced nodes in the enhanced graph share the same polymorphic personality.

    • Constructor Summary

      Constructors 
      Constructor Description
      EnhGraph​(Graph g, Personality<RDFNode> p)
      Construct an enhanced graph from the given underlying graph, and a factory for generating enhanced nodes.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      Graph asGraph()
      Answer the normal graph that this enhanced graph is wrapping.
      boolean equals​(java.lang.Object o)
      An enhanced graph is equal to another graph g iff the underlying graphs are equal.
      <X extends RDFNode>
      X      		 getNodeAs​(Node n, java.lang.Class<X> interf)
      Answer an enhanced node that wraps the given node and conforms to the given interface type.
      int hashCode()
      Hashcode for an enhanced graph is delegated to the underlying graph.
      boolean isIsomorphicWith​(EnhGraph eg)
      Answer true if the given enhanced graph contains the same nodes and edges as this graph.
      void setNodeCache​(Cache<Node,​RDFNode> cc)
      Set the cache controller object for this graph

      • Methods inherited from class java.lang.Object

        getClass, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • EnhGraph

        public EnhGraph​(Graph g,
                Personality<RDFNode> p)
        Construct an enhanced graph from the given underlying graph, and a factory for generating enhanced nodes.
        Parameters:
        g - The underlying plain graph, may be null to defer binding to a given graph until later.
        p - The personality factory, that maps types to realizations

    • Method Detail

      • asGraph

        public Graph asGraph()
        Answer the normal graph that this enhanced graph is wrapping.
        Returns:
        A graph

      • hashCode

        public final int hashCode()
        Hashcode for an enhanced graph is delegated to the underlying graph.
        Overrides:
        hashCode in class java.lang.Object
        Returns:
        The hashcode as an int

      • equals

        public final boolean equals​(java.lang.Object o)
        An enhanced graph is equal to another graph g iff the underlying graphs are equal. This is deemed to be a complete and correct interpretation of enhanced graph equality, which is why this method has been marked final.

        Note that this equality test does not look for correspondence between the structures in the two graphs. To test whether another graph has the same nodes and edges as this one, use isIsomorphicWith(org.apache.jena.enhanced.EnhGraph).

        Overrides:
        equals in class java.lang.Object
        Parameters:
        o - An object to test for equality with this node
        Returns:
        True if o is equal to this node.
        See Also:
        isIsomorphicWith(org.apache.jena.enhanced.EnhGraph)

      • isIsomorphicWith

        public final boolean isIsomorphicWith​(EnhGraph eg)
        Answer true if the given enhanced graph contains the same nodes and edges as this graph. The default implementation delegates this to the underlying graph objects.
        Parameters:
        eg - A graph to test
        Returns:
        True if eg is a graph with the same structure as this.

      • getNodeAs

        public <X extends RDFNode> X getNodeAs​(Node n,
                                       java.lang.Class<X> interf)
        Answer an enhanced node that wraps the given node and conforms to the given interface type.
        Parameters:
        n - A node (assumed to be in this graph)
        interf - A type denoting the enhanced facet desired
        Returns:
        An enhanced node

      • setNodeCache

        public void setNodeCache​(Cache<Node,​RDFNode> cc)
        Set the cache controller object for this graph
        Parameters:
        cc - The cache controller