org.apache.jackrabbit.core.query.lucene.constraint
Class QueryConstraint

java.lang.Object
  org.apache.jackrabbit.core.query.lucene.constraint.SelectorBasedConstraint
      org.apache.jackrabbit.core.query.lucene.constraint.QueryConstraint

All Implemented Interfaces:

Constraint

Direct Known Subclasses:

FullTextConstraint, PropertyExistenceConstraint

public abstract class QueryConstraint
extends SelectorBasedConstraint

QueryConstraint implements a constraint that is based on a lucene query.

Constructor Summary

QueryConstraint(org.apache.lucene.search.Query constraint, SelectorImpl selector, LuceneQueryFactory factory)
Creates a new query constraint using the given lucene query.

Method Summary

boolean

evaluate(ScoreNode[] row, Name[] selectorNames, EvaluationContext context) Evaluates this constraint for the given row.

Methods inherited from class org.apache.jackrabbit.core.query.lucene.constraint.SelectorBasedConstraint

getSelector, getSelectorIndex

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryConstraint

public QueryConstraint(org.apache.lucene.search.Query constraint,
                       SelectorImpl selector,
                       LuceneQueryFactory factory)

Creates a new query constraint using the given lucene query.

Parameters:

constraint - the lucene query constraint.

selector - the selector for this constraint.

factory - the lucene query factory.

Method Detail

evaluate

public boolean evaluate(ScoreNode[] row,
                        Name[] selectorNames,
                        EvaluationContext context)
                 throws IOException

Evaluates this constraint for the given row.

Parameters:

row - the current row of score nodes.

selectorNames - the selector names associated with row.

context - the evaluation context.

Returns:

true if the row satisfies the constraint, false otherwise.

Throws:

IOException - if an error occurs while evaluating the constraint.