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## com.hp.hpl.jena.reasoner.dig
Class DIGQueryRoleFillerTranslator

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

    public class DIGQueryRoleFillerTranslator

extends DIGQueryTranslator

Translator that generates a DIG roleFillers query in response to a find queries:

     :a :r :b

where both a and b are known.

Version:
  CVS $Id: DIGQueryRoleFillerTranslator.java,v 1.9 2008/01/02 12:07:12 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
`DIGQueryRoleFillerTranslator()` Construct a translator for the DIG query 'roleFillers'.

Method Summary
`boolean` | `checkObject(Node object, DIGAdapter da, Model premises)` Additional test on the object of the incoming find pattern.
`boolean` | `checkPredicate(Node predicate, DIGAdapter da, Model premises)` Additional test on the predicate 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 list the role fillers for an individual-role pair
`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
`checkTriple, find, find, translateResponse, trigger`

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### DIGQueryRoleFillerTranslator

    public DIGQueryRoleFillerTranslator()

  Construct a translator for the DIG query 'roleFillers'.

Method Detail

### translatePattern

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

  Answer a query that will list the role fillers for an individual-role pair

  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

### checkPredicate

    public boolean checkPredicate(Node predicate,
                                  DIGAdapter da,
                                  Model premises)

  Description copied from class: `DIGQueryTranslator`

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

  Overrides:
    `checkPredicate` in class `DIGQueryTranslator`
  Parameters:
    `predicate` - The predicate 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 predicate matches the trigger condition expressed by this translator instance

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