rulepreprocesshook.java

jena2.5.4推理机系统的一种最基本实现 HP实验室出品

/******************************************************************
 * File:        RuleProprocessHook.java
 * Created by:  Dave Reynolds
 * Created on:  18-Jun-2003
 * 
 * (c) Copyright 2003, 2004, 2005, 2006, 2007 Hewlett-Packard Development Company, LP
 * [See end of file]
 * $Id: RulePreprocessHook.java,v 1.8 2007/01/02 11:50:58 andy_seaborne Exp $
 *****************************************************************/
package com.hp.hpl.jena.reasoner.rulesys;

import com.hp.hpl.jena.graph.Graph;
import com.hp.hpl.jena.graph.Triple;
import com.hp.hpl.jena.reasoner.Finder;

/**
 * Implementors of this interface can be used as proprocessing passes
 * during intialization of (hybrid) rule systems. They are typically
 * used to generate additional data-dependent rules or additional
 * deductions (normally from comprehension axioms) which are cheaper
 * this way than using the generic rule engines.
 * 
 * @author <a href="mailto:[e-mail]">Dave Reynolds</a>
 * @version $Revision: 1.8 $ on $Date: 2007/01/02 11:50:58 $
 */
public interface RulePreprocessHook {

    /**
     * Invoke the preprocessing hook. This will be called during the
     * preparation time of the hybrid reasoner.
     * @param infGraph the inference graph which is being prepared,
     * the hook code can use this to add pure deductions or add additional
     * rules (using addRuleDuringPrepare).
     * @param dataFind the finder which packages up the raw data (both
     * schema and data bind) and any cached transitive closures.
     * @param inserts a temporary graph into which the hook should insert
     * all new deductions that should be seen by the rules.
     */
    public void run(FBRuleInfGraph infGraph, Finder dataFind, Graph inserts);
    
    /**
     * Validate a triple add to see if it should reinvoke the hook. If so
     * then the inference will be restarted at next prepare time. Incremental
     * re-processing is not yet supported.
     */
    public boolean needsRerun(FBRuleInfGraph infGraph, Triple t);
    
}



/*
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