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

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.ChildNodeConstraint

All Implemented Interfaces:

Constraint

public class ChildNodeConstraint
extends HierarchyConstraint

ChildNodeConstraint implements a child node constraint.

Constructor Summary

ChildNodeConstraint(ChildNodeImpl constraint, SelectorImpl selector)
Creates a child node constraint from the given QOM constraint on the given selector.

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

ChildNodeConstraint

public ChildNodeConstraint(ChildNodeImpl constraint,
                           SelectorImpl selector)

Creates a child node constraint from the given QOM constraint on the given selector.

Parameters:

constraint - the QOM child 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.