no.sesat.search.query.parser
Class EmailClauseImpl

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

All Implemented Interfaces:

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

public final class EmailClauseImpl
extends AbstractLeafClause
implements EmailClause

EmailClauseImpl. Contains one email address. Objects of this class are immutable

Version:

$Id: IntegerClauseImpl.java 2335 2006-02-18 13:45:11Z mickw $

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

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

Method Summary

static EmailClauseImpl

createEmailClause(String term, String field, TokenEvaluationEngine engine) Creator method for EmailClauseImpl 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

EmailClauseImpl

protected EmailClauseImpl(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

createEmailClause

public static EmailClauseImpl createEmailClause(String term,
                                                String field,
                                                TokenEvaluationEngine engine)

Creator method for EmailClauseImpl objects. By avoiding the constructors, and assuming all EmailClauseImpl 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 EmailClauseImpl 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.

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

Returns:

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