org.apache.directory.server.xdbm.search.evaluator

Class PresenceEvaluator

java.lang.Object

org.apache.directory.server.xdbm.search.evaluator.PresenceEvaluator

All Implemented Interfaces:

Evaluator<org.apache.directory.api.ldap.model.filter.PresenceNode>

public class PresenceEvaluator
extends Object
implements Evaluator<org.apache.directory.api.ldap.model.filter.PresenceNode>

An Evaluator which determines if candidates are matched by GreaterEqNode assertions.

Author:

Apache Directory Project

Constructor Summary

Constructors

Constructor and Description
PresenceEvaluator(org.apache.directory.api.ldap.model.filter.PresenceNode node, Store db, org.apache.directory.api.ldap.model.schema.SchemaManager schemaManager) Creates a new PresenceEvaluator

Method Summary

Modifier and Type	Method and Description
boolean	evaluate(org.apache.directory.api.ldap.model.entry.Entry entry) Evaluates whether or not a candidate, satisfies the expression associated with this Evaluator .
boolean	evaluate(org.apache.directory.server.core.api.partition.PartitionTxn partitionTxn, IndexEntry<?,String> indexEntry) Evaluates a candidate to determine if a filter expression selects it.
org.apache.directory.api.ldap.model.schema.AttributeType	getAttributeType()
org.apache.directory.api.ldap.model.filter.PresenceNode	getExpression() Gets the expression used by this expression Evaluator.
String	toString()
String	toString(String tabs) Pretty-print an Evaluator

Methods inherited from class java.lang.Object

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

Constructor Detail

PresenceEvaluator

public PresenceEvaluator(org.apache.directory.api.ldap.model.filter.PresenceNode node,
                         Store db,
                         org.apache.directory.api.ldap.model.schema.SchemaManager schemaManager)

Creates a new PresenceEvaluator

Parameters:

node - The PresenceNode

db - The Store

schemaManager - The SchemaManager

Method Detail

getExpression

public org.apache.directory.api.ldap.model.filter.PresenceNode getExpression()

Gets the expression used by this expression Evaluator.

Specified by:

getExpression in interface Evaluator<org.apache.directory.api.ldap.model.filter.PresenceNode>

Returns:

the AST for the expression

getAttributeType

public org.apache.directory.api.ldap.model.schema.AttributeType getAttributeType()

Returns:

the attributeType

evaluate

public boolean evaluate(org.apache.directory.server.core.api.partition.PartitionTxn partitionTxn,
                        IndexEntry<?,String> indexEntry)
                 throws org.apache.directory.api.ldap.model.exception.LdapException

Evaluates a candidate to determine if a filter expression selects it. If an IndexEntry does has a null reference to the entry object, this Evaluator may set it if it has to access the full entry within the master table of the store. Subsequent evaluations on the IndexEntry then need not access the store to retreive the entry if they need to access it's attributes.

Specified by:

evaluate in interface Evaluator<org.apache.directory.api.ldap.model.filter.PresenceNode>

Parameters:

partitionTxn - The transaction to use

indexEntry - the index record of the entry to evaluate

Returns:

true if filter selects the candidate false otherwise

Throws:

org.apache.directory.api.ldap.model.exception.LdapException - if there are faults during evaluation

evaluate

public boolean evaluate(org.apache.directory.api.ldap.model.entry.Entry entry)
                 throws org.apache.directory.api.ldap.model.exception.LdapException

Evaluates whether or not a candidate, satisfies the expression associated with this Evaluator .

Specified by:

evaluate in interface Evaluator<org.apache.directory.api.ldap.model.filter.PresenceNode>

Parameters:

entry - the candidate entry

Returns:

true if filter selects the candidate false otherwise

Throws:

org.apache.directory.api.ldap.model.exception.LdapException - if there are faults during evaluation

toString

public String toString(String tabs)

Description copied from interface: Evaluator

Pretty-print an Evaluator

Specified by:

toString in interface Evaluator<org.apache.directory.api.ldap.model.filter.PresenceNode>

Parameters:

tabs - The tabs to add before the evaluator

Returns:

The pretty-printed evaluator and its descendants

See Also:

Object.toString()

toString

public String toString()

Overrides:

toString in class Object

See Also:

Object.toString()