Package com.complexible.stardog

Class Contexts

java.lang.Object
com.complexible.stardog.Contexts
public final class Contexts extends Object
Defines constants that represent special URIs for contexts (named graphs).
Since:
0.9
Version:
6.0
Author:
Evren Sirin, Michael Grove

  • Field Details

    • DEFAULT

      public static final IRI DEFAULT
      Special URI representing the default (no) context in Stardog.

    • LOCAL

      public static final IRI LOCAL
      Special URI representing all contexts in Stardog, including the default (no) context graph.

    • NAMED

      public static final IRI NAMED
      Special URI representing all local named graphs in Stardog, excluding the default graph.

    • VIRTUAL

      public static final IRI VIRTUAL
      Special URI representing all virtual graphs

    • ALL

      public static final IRI ALL
      Special URI representing all local and virtual graphs

  • Method Details

    • isAllOrLocal

      public static boolean isAllOrLocal(Resource theContext)
      Return whether or not the resource represents the meta-context ALL or LOCAL

    • isAllOrLocal

      public static boolean isAllOrLocal(Collection<? extends Resource> theContexts)
      Return whether or not the collection contains the meta-contexts ALL or LOCAL

    • isAll

      public static boolean isAll(Resource theContext)
      Return whether or not the resource represents the meta-context ALL

    • isLocal

      public static boolean isLocal(Resource theContext)
      Return whether or not the resource represents the meta-context LOCAL

    • isNamed

      public static boolean isNamed(Resource theContext)
      Return whether or not the resource represents the meta-context NAMED
      Parameters:
      theContext - the context
      Returns:
      true if its NAMED, false otherwise

    • isVirtualWildcard

      public static boolean isVirtualWildcard(Resource theContext)
      Return whether or not the resource represents the meta-context VIRTUAL. So named to distinguish from the test for virtual prefix.

    • nullToDefault

      public static Resource nullToDefault(Resource theResource)
      Takes a Resource identifying a named graph, and if it is null, returns the constant for the DEFAULT graph. Otherwise, returns the parameter as-is.
      Parameters:
      theResource - the named graph
      Returns:
      the named graph, DEFAULT if the parameter is null.

    • defaultToNull

      public static Resource defaultToNull(Resource theResource)
      Takes a Resource identifying a named graph, and if it is the constant for the DEFAULT graph, it will return null, otherwise it returns the parameter as-is.
      Parameters:
      theResource - the named graph
      Returns:
      the named graph; null if it was the default graph

    • isDefaultGraph

      public static <T extends Value> Predicate<T> isDefaultGraph()

    • isWildcard

      public static boolean isWildcard(Resource theContext)
      Returns true if the given context is one of the following "wildcard" (special) graph names: ALL, LOCAL, NAMED, VIRTUAL

    • isDefaultGraphOrWildcard

      public static boolean isDefaultGraphOrWildcard(Resource theContext)

    • isSingleton

      public static boolean isSingleton(Set<Resource> theContexts)
      Returns true if the set of contexts is a singleton
      Parameters:
      theContexts -
      Returns:

    • isVirtualOrVirtualWildcard

      public static boolean isVirtualOrVirtualWildcard(Resource g)
      Tests whether the supplied graph name is either the virtual wildcard (VIRTUAL) or any particular virtual graph IRI (one beginning with the virtual:// prefix).