com.hp.hpl.jena.reasoner.dig
Class DIGQueryAncestorsTranslator

java.lang.Object
  com.hp.hpl.jena.reasoner.dig.DIGQueryTranslator
      com.hp.hpl.jena.reasoner.dig.DIGQueryAncestorsTranslator

Direct Known Subclasses:

DIGQueryParentsTranslator

public class DIGQueryAncestorsTranslator
extends DIGQueryTranslator

Translator that generates DIG ancestors/desendants queries in response to a find queries:

 :X rdf:subClassOf *
 *  rdf:subClassOf :X
 

or similar.

Version:

CVS $Id: DIGQueryAncestorsTranslator.java,v 1.12 2008/01/02 12:07:09 andy_seaborne Exp $

Author:

Ian Dickinson, HP Labs (email)

Field Summary

Fields inherited from class com.hp.hpl.jena.reasoner.dig.DIGQueryTranslator

ALL

Constructor Summary

DIGQueryAncestorsTranslator(java.lang.String predicate, boolean ancestors)
Construct a translator for the DIG query 'parents'.

Method Summary

boolean	checkObject(Node object, DIGAdapter da, Model premises) Additional test on the object of the incoming find pattern.
boolean	checkSubject(Node subject, DIGAdapter da, Model premises) Additional test on the subject of the incoming find pattern.
org.w3c.dom.Document	translatePattern(TriplePattern pattern, DIGAdapter da) Answer a query that will generate the class hierachy for a concept
org.w3c.dom.Document	translatePattern(TriplePattern pattern, DIGAdapter da, Model premises) Answer an XML document that presents the translation of the query into DIG query language, given that either the subject or object may be expressions defined by the statements in the premises model.
ExtendedIterator	translateResponseHook(org.w3c.dom.Document response, TriplePattern query, DIGAdapter da) Answer an iterator of triples that match the original find query.

Methods inherited from class com.hp.hpl.jena.reasoner.dig.DIGQueryTranslator

checkPredicate, checkTriple, find, find, translateResponse, trigger

Methods inherited from class java.lang.Object

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

Constructor Detail

DIGQueryAncestorsTranslator

public DIGQueryAncestorsTranslator(java.lang.String predicate,
                                   boolean ancestors)

Construct a translator for the DIG query 'parents'.

Parameters:

predicate - The predicate URI to trigger on

ancestors - If true, we are searching for parents of the class; if false, the descendants

Method Detail

translatePattern

public org.w3c.dom.Document translatePattern(TriplePattern pattern,
                                             DIGAdapter da)

Answer a query that will generate the class hierachy for a concept

Specified by:

translatePattern in class DIGQueryTranslator

translateResponseHook

public ExtendedIterator translateResponseHook(org.w3c.dom.Document response,
                                              TriplePattern query,
                                              DIGAdapter da)

Answer an iterator of triples that match the original find query.

translatePattern

public org.w3c.dom.Document translatePattern(TriplePattern pattern,
                                             DIGAdapter da,
                                             Model premises)

Description copied from class: DIGQueryTranslator

Answer an XML document that presents the translation of the query into DIG query language, given that either the subject or object may be expressions defined by the statements in the premises model.

Specified by:

translatePattern in class DIGQueryTranslator

checkSubject

public boolean checkSubject(Node subject,
                            DIGAdapter da,
                            Model premises)

Description copied from class: DIGQueryTranslator

Additional test on the subject of the incoming find pattern. Default is to always match

Overrides:

checkSubject in class DIGQueryTranslator

Parameters:

subject - The subject resource from the incoming pattern

da - The current dig adapter

premises - A model that conveys additional information about the premises of the query, which might assist the check to suceed or fail. By default it is ignored.

Returns:

True if this subject matches the trigger condition expressed by this translator instance

checkObject

public boolean checkObject(Node object,
                           DIGAdapter da,
                           Model premises)

Description copied from class: DIGQueryTranslator

Additional test on the object of the incoming find pattern. Default is to always match

Overrides:

checkObject in class DIGQueryTranslator

Parameters:

object - The object resource from the incoming pattern

da - The current dig adapter

premises - A model that conveys additional information about the premises of the query, which might assist the check to suceed or fail. By default it is ignored.

Returns:

True if this object matches the trigger condition expressed by this translator instance