no.sesat.search.query.token
Class RegExpEvaluatorFactory

java.lang.Object
  no.sesat.search.query.token.AbstractEvaluatorFactory
      no.sesat.search.query.token.RegExpEvaluatorFactory

public final class RegExpEvaluatorFactory
extends AbstractEvaluatorFactory

Responsible for loading and serving all the Regular Expression Token Evaluators. These regular expression patterns come from the configuration file SearchConstants.REGEXP_EVALUATOR_XMLFILE. RegExpEvaluator's are re-used across queries so to cache the compiled patterns.

Version:

$Id: RegExpEvaluatorFactory.java 7225 2009-04-09 00:32:20Z ssmiweve $

Nested Class Summary

Nested classes/interfaces inherited from class no.sesat.search.query.token.AbstractEvaluatorFactory

AbstractEvaluatorFactory.Context

Field Summary

static String

REGEXP_EVALUATOR_XMLFILE The name of the file where regular expressions for each TokenPredicate will be configured.

Constructor Summary

RegExpEvaluatorFactory(AbstractEvaluatorFactory.Context cxt)

Method Summary

TokenEvaluator

getEvaluator(TokenPredicate token) If the evaluator is not found in this site it will fallback and look in the parent site.

Methods inherited from class no.sesat.search.query.token.AbstractEvaluatorFactory

getContext, instanceOf, isResponsibleFor

Methods inherited from class java.lang.Object

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

Field Detail

REGEXP_EVALUATOR_XMLFILE

public static final String REGEXP_EVALUATOR_XMLFILE

The name of the file where regular expressions for each TokenPredicate will be configured.

See Also:

Constant Field Values

Constructor Detail

RegExpEvaluatorFactory

public RegExpEvaluatorFactory(AbstractEvaluatorFactory.Context cxt)
                       throws SiteKeyedFactoryInstantiationException

Throws:

SiteKeyedFactoryInstantiationException

Method Detail

getEvaluator

public TokenEvaluator getEvaluator(TokenPredicate token)
                            throws EvaluationException

Description copied from class: AbstractEvaluatorFactory

If the evaluator is not found in this site it will fallback and look in the parent site.

Specified by:

getEvaluator in class AbstractEvaluatorFactory

Parameters:

token - the predicate the evaluator is to be used for

Returns:

the TokenEvaluator to use. Or TokenEvaluationEngineImpl.ALWAYS_FALSE_EVALUATOR if not found.

Throws:

EvaluationException