com.hp.hpl.jena.graph.query
Class Bound

java.lang.Object
  com.hp.hpl.jena.graph.query.Element
      com.hp.hpl.jena.graph.query.Bound

public class Bound
extends Element

An element which represents an already-bound variable.

Field Summary

Fields inherited from class com.hp.hpl.jena.graph.query.Element

ANY

Constructor Summary

Bound(int n)
Initialise a Bound element: remember n as it is the index into the Domain at which its value is stored.

Method Summary

Node	asNodeMatch(Domain d) Answer a Node suitable as a pattern-match element in a TripleMatch approximating this Element.
boolean	match(Domain d, Node x) Answer true iff the node x matches the previously-seen value at Donain[index].
String	toString()

Methods inherited from class com.hp.hpl.jena.graph.query.Element

getIndex

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Bound

public Bound(int n)

Initialise a Bound element: remember n as it is the index into the Domain at which its value is stored.

Method Detail

match

public boolean match(Domain d,
                     Node x)

Answer true iff the node x matches the previously-seen value at Donain[index]. The matching uses datatype-value semantics, implemented by Node::sameValueAs().

Specified by:

match in class Element

Parameters:

d - the variable bindings to read/update for variables

x - the value to match

Returns:

true if the match succeeded

asNodeMatch

public Node asNodeMatch(Domain d)

Description copied from class: Element

Answer a Node suitable as a pattern-match element in a TripleMatch approximating this Element. Thus Bind elements map to null (or Node.ANY).

Specified by:

asNodeMatch in class Element

Parameters:

d - the domain holding the variable bindings

Returns:

the matched value (null if none, ie binding occurance or ANY)

toString

public String toString()

Overrides:

toString in class Element