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Java Source Code / Java Documentation » RSS RDF » Jena 2.5.5 » com.hp.hpl.jena.reasoner.rulesys

Source Cross Reference

Class Diagram

Java Document (Java Doc)

com.hp.hpl.jena.reasoner.rulesys .BindingEnvironment

All known Subclasses:   com.hp.hpl.jena.reasoner.rulesys.impl .BindingStack,  com.hp.hpl.jena.reasoner.rulesys.impl .LPBindingEnvironment,  com.hp.hpl.jena.reasoner.rulesys.impl.oldCode .Trail,  com.hp.hpl.jena.reasoner.rulesys.impl .BindingVector,
BindingEnvironment
public interface BindingEnvironment (Code)
Interface through which the current bound values of variables can be found. Many of the details vary between the forward and backward chaining system - this interface is the minimal one needed by most builtins the specific implementations offer richer functionality.
author:
   Dave Reynolds
version:
   $Revision: 1.11 $ on $Date: 2008/01/02 12:07:47 $

Method Summary
public boolean bind(Node var, Node value)
     Bind a variable in the current envionment to the given value.
public Node getGroundVersion(Node node)
     Return the most ground version of the node.
public Triple instantiate(TriplePattern pattern)
     Instantiate a triple pattern against the current environment.

Method Detail
bind
public boolean bind(Node var, Node value)(Code)
Bind a variable in the current envionment to the given value. Checks that the new binding is compatible with any current binding.
Parameters:
  var - a Node_RuleVariable defining the variable to bind
Parameters:
  value - the value to bind false if the binding fails

getGroundVersion
public Node getGroundVersion(Node node)(Code)
Return the most ground version of the node. If the node is not a variable just return it, if it is a varible bound in this environment return the binding, if it is an unbound variable return the variable.

instantiate
public Triple instantiate(TriplePattern pattern)(Code)
Instantiate a triple pattern against the current environment. This version handles unbound varibles by turning them into bNodes.
Parameters:
  pattern - the triple pattern to match a new, instantiated triple

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