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

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

public class Bind
extends Element

A binding instance of a variable. It accepts any node and records it in the supplied Domain at the index allocated to it when it is created.

Author:

hedgehog

Field Summary

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

ANY

Constructor Summary

Bind(int n)
Initialise a Bind element: remember the index n which is the place in Domain's where it may store its value.

Method Summary

Node	asNodeMatch(Domain d) Answer Node.ANY, as a binding occurance of a variable can match anything.
boolean	match(Domain d, Node x) Answer true after updating the domain to record the value this element binds.
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

Bind

public Bind(int n)

Initialise a Bind element: remember the index n which is the place in Domain's where it may store its value.

Method Detail

match

public boolean match(Domain d,
                     Node x)

Answer true after updating the domain to record the value this element binds.

Specified by:

match in class Element

Parameters:

d - the domain in which to note this element is bound to x.

x - the value to match

Returns:

true [after side-effecting d]

asNodeMatch

public Node asNodeMatch(Domain d)

Answer Node.ANY, as a binding occurance of a variable can match anything.

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