org.apache.directory.server.core.partition.impl.btree
Class ExpressionEvaluator

java.lang.Object
  org.apache.directory.server.core.partition.impl.btree.ExpressionEvaluator

All Implemented Interfaces:

Evaluator

public class ExpressionEvaluator
extends java.lang.Object
implements Evaluator

Top level filter expression evaluator implemenation.

Version:

$Rev: 434579 $

Author:

Apache Directory Project

Constructor Summary

ExpressionEvaluator(BTreePartition db, OidRegistry oidRegistry, AttributeTypeRegistry attributeTypeRegistry)
Creates a top level Evaluator where leaves are delegated to a leaf node evaluator which will be created.

ExpressionEvaluator(LeafEvaluator leafEvaluator)
Creates a top level Evaluator where leaves are delegated to a leaf node evaluator which is already provided.

Method Summary

boolean	evaluate(org.apache.directory.shared.ldap.filter.ExprNode node, IndexRecord record) Evaluates a candidate to determine if a filter expression selects it.
LeafEvaluator	getLeafEvaluator() Gets the leaf evaluator used by this top level expression evaluator.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionEvaluator

public ExpressionEvaluator(LeafEvaluator leafEvaluator)

Creates a top level Evaluator where leaves are delegated to a leaf node evaluator which is already provided.

Parameters:

leafEvaluator - handles leaf node evaluation.

ExpressionEvaluator

public ExpressionEvaluator(BTreePartition db,
                           OidRegistry oidRegistry,
                           AttributeTypeRegistry attributeTypeRegistry)

Creates a top level Evaluator where leaves are delegated to a leaf node evaluator which will be created.

Parameters:

db - the database this evaluator operates upon

oidRegistry - the oid reg used for attrID to oid resolution

attributeTypeRegistry - the attribtype reg used for value comparison

Method Detail

getLeafEvaluator

public LeafEvaluator getLeafEvaluator()

Gets the leaf evaluator used by this top level expression evaluator.

Returns:

the leaf evaluator used by this top level expression evaluator

evaluate

public boolean evaluate(org.apache.directory.shared.ldap.filter.ExprNode node,
                        IndexRecord record)
                 throws javax.naming.NamingException

Description copied from interface: Evaluator

Evaluates a candidate to determine if a filter expression selects it.

Specified by:

evaluate in interface Evaluator

Parameters:

node - the filter expression to evaluate on the candidate

record - the index record of the entry to evaluate

Returns:

true if the filter selects the candidate false otherwise

Throws:

javax.naming.NamingException - if there is a database fault during evaluation

See Also:

Evaluator.evaluate(ExprNode, IndexRecord)