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

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

All Implemented Interfaces:

Constraint

Direct Known Subclasses:

ChildNodeConstraint, DescendantNodeConstraint, SameNodeConstraint

public abstract class HierarchyConstraint
extends SelectorBasedConstraint

HierarchyConstraint is a base class for hierarchy related constraints.

Constructor Summary

HierarchyConstraint(String path, SelectorImpl selector)
Creates a new hierarchy constraint with the given base path.

Method Summary

protected NodeId

getBaseNodeId(EvaluationContext context) Returns the id of the base node or null if there is no node at the base path.

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

Methods inherited from interface org.apache.jackrabbit.core.query.lucene.constraint.Constraint

evaluate

Constructor Detail

HierarchyConstraint

public HierarchyConstraint(String path,
                           SelectorImpl selector)

Creates a new hierarchy constraint with the given base path.

Parameters:

path - the base path.

selector - the selector this constraint is placed on.

Method Detail

getBaseNodeId

protected final NodeId getBaseNodeId(EvaluationContext context)

Returns the id of the base node or null if there is no node at the base path.

Parameters:

context - the evaluation context.

Returns:

the id or null if it doesn't exist.