no.sesat.search.query.parser
Class IntegerClauseImpl

java.lang.Object
  no.sesat.search.query.parser.AbstractClause
      no.sesat.search.query.parser.AbstractLeafClause
          no.sesat.search.query.parser.IntegerClauseImpl

All Implemented Interfaces:

Serializable, no.sesat.commons.visitor.Visitable, Clause, IntegerClause, LeafClause, WordClause

public final class IntegerClauseImpl
extends AbstractLeafClause
implements IntegerClause

IntegerClauseImpl. Contains only digits. Objects of this class are immutable

Version:

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

See Also:

Serialized Form

Field Summary

Fields inherited from class no.sesat.search.query.parser.AbstractLeafClause

field

Fields inherited from class no.sesat.search.query.parser.AbstractClause

DFAULT_REFERENCE_MAP_TYPE, ERR_FAILED_FINDING_OR_USING_CONSTRUCTOR, ERR_MUST_ALWAYS_USE_ARGED_CONSTRUCTOR

Constructor Summary

protected

IntegerClauseImpl(String term, String field, Set<TokenPredicate> knownPredicates, Set<TokenPredicate> possiblePredicates) Create clause with the given term, known and possible predicates.

Method Summary

static IntegerClauseImpl

createIntegerClause(String term, String field, TokenEvaluationEngine predicate2evaluatorFactory) Creator method for IntegerClauseImpl objects.

Methods inherited from class no.sesat.search.query.parser.AbstractLeafClause

createClause, getField, toString

Methods inherited from class no.sesat.search.query.parser.AbstractClause

accept, addClauseInUse, findClauseInUse, findPredicates, getKnownPredicates, getPossiblePredicates, getTerm, hashCode

Methods inherited from class java.lang.Object

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

Methods inherited from interface no.sesat.search.query.WordClause

getField

Methods inherited from interface no.sesat.search.query.Clause

getKnownPredicates, getPossiblePredicates, getTerm

Methods inherited from interface no.sesat.commons.visitor.Visitable

accept

Constructor Detail

IntegerClauseImpl

protected IntegerClauseImpl(String term,
                            String field,
                            Set<TokenPredicate> knownPredicates,
                            Set<TokenPredicate> possiblePredicates)

Create clause with the given term, known and possible predicates.

Parameters:

term - the term (query string) for this clause.

field - the field for this clause. May be null.

knownPredicates - the set of known predicates for this clause.

possiblePredicates - the set of possible predicates for this clause.

Method Detail

createIntegerClause

public static IntegerClauseImpl createIntegerClause(String term,
                                                    String field,
                                                    TokenEvaluationEngine predicate2evaluatorFactory)

Creator method for IntegerClauseImpl objects. By avoiding the constructors, and assuming all IntegerClauseImpl objects are immutable, we can keep track (via a weak reference map) of instances already in use in this JVM and reuse them. The methods also allow a chunk of creation logic for the IntegerClauseImpl to be moved out of the QueryParserImpl.jj file to here.

Parameters:

term - the term this clause represents.

field - any field this clause was specified against.

predicate2evaluatorFactory - the factory handing out evaluators against TokenPredicates. Also holds state information about the current term/clause we are finding predicates against.

Returns:

returns a IntIntegerClauseImplstance matching the term, left and right child clauses. May be either newly created or reused.