Module org.apache.jena.core
Package org.apache.jena.graph

Class Triple

java.lang.Object
org.apache.jena.graph.Triple
All Implemented Interfaces:
Serializable
public class Triple extends Object implements Serializable
Triples are the basis for RDF statements; they have a subject, predicate, and object field (all nodes) and express the notion that the relationship named by the predicate holds between the subject and the object.
See Also:

  • Field Details

    • ANY

      public static final Triple ANY
      A Triple that has Node.ANY in all fields.

  • Method Details

    • toString

      public String toString()
      return a human-readable string "subject @predicate object" describing the triple
      Overrides:
      toString in class Object

    • toString

      public String toString(PrefixMapping pm)

    • getSubject

      public final Node getSubject()
      Returns:
      the subject of the triple

    • getPredicate

      public final Node getPredicate()
      Returns:
      the predicate of the triple

    • getObject

      public final Node getObject()
      Returns:
      the object of the triple

    • getMatchSubject

      public Node getMatchSubject()
      Return subject or null, not Node.ANY

    • getMatchPredicate

      public Node getMatchPredicate()
      Return predicate or null, not Node.ANY

    • getMatchObject

      public Node getMatchObject()
      Return object or null, not Node.ANY

    • isConcrete

      public boolean isConcrete()

    • equals

      public boolean equals(Object o)
      Answer true if o is a Triple with the same subject, predicate, and object as this triple.
      Overrides:
      equals in class Object

    • sameAs

      public boolean sameAs(Node s, Node p, Node o)
      Answer true iff this triple has subject s, predicate p, and object o.

    • matches

      public boolean matches(Triple other)
      Does this triple, used as a pattern match, the other triple (usually a ground triple)

    • matches

      public boolean matches(Node s, Node p, Node o)

    • subjectMatches

      public boolean subjectMatches(Node s)

    • predicateMatches

      public boolean predicateMatches(Node p)

    • objectMatches

      public boolean objectMatches(Node o)

    • hashCode

      public int hashCode()
      The hash-code of a triple is the hash-codes of its components munged together: see hashCode(S, P, O).
      Overrides:
      hashCode in class Object

    • hashCode

      public static int hashCode(Node s, Node p, Node o)
      Return the munged hashCodes of the specified nodes, an exclusive-or of the slightly-shifted component hashcodes; this means (almost) all of the bits count, and the order matters, so (S P O) has a different hash from (O P S), etc.

    • create

      public static Triple create(Node s, Node p, Node o)

    • createMatch

      public static Triple createMatch(Node s, Node p, Node o)