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

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

All Implemented Interfaces:

Constraint

public class DescendantNodeConstraint
extends HierarchyConstraint

DescendantNodeConstraint implements a descendant node constraint.

Constructor Summary

DescendantNodeConstraint(DescendantNodeImpl constraint, SelectorImpl selector)
Creates a new descendant node constraint from the given QOM constraint.

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.HierarchyConstraint

getBaseNodeId

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

DescendantNodeConstraint

public DescendantNodeConstraint(DescendantNodeImpl constraint,
                                SelectorImpl selector)

Creates a new descendant node constraint from the given QOM constraint.

Parameters:

constraint - the QOM descendant node constraint.

selector - the selector.

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.