org.apache.directory.server.xdbm.search.impl
Class PresenceEvaluator<ID extends Comparable<ID>>

java.lang.Object
  org.apache.directory.server.xdbm.search.impl.PresenceEvaluator<ID>

All Implemented Interfaces:

Evaluator<org.apache.directory.shared.ldap.model.filter.PresenceNode,org.apache.directory.shared.ldap.model.entry.Entry,ID>

public class PresenceEvaluator<ID extends Comparable<ID>>
extends Object
implements Evaluator<org.apache.directory.shared.ldap.model.filter.PresenceNode,org.apache.directory.shared.ldap.model.entry.Entry,ID>

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

Author:

Apache Directory Project

Constructor Summary

PresenceEvaluator(org.apache.directory.shared.ldap.model.filter.PresenceNode node, Store<org.apache.directory.shared.ldap.model.entry.Entry,ID> db, org.apache.directory.shared.ldap.model.schema.SchemaManager schemaManager)

Method Summary

boolean	evaluate(IndexEntry<?,ID> indexEntry) Evaluates a candidate to determine if a filter expression selects it.
boolean	evaluateEntry(org.apache.directory.shared.ldap.model.entry.Entry entry) Evaluates whether or not a candidate, satisfies the expression associated with this Evaluator .
boolean	evaluateId(ID id)
org.apache.directory.shared.ldap.model.schema.AttributeType	getAttributeType()
org.apache.directory.shared.ldap.model.filter.PresenceNode	getExpression() Gets the expression used by this expression Evaluator.

Methods inherited from class java.lang.Object

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

Constructor Detail

PresenceEvaluator

public PresenceEvaluator(org.apache.directory.shared.ldap.model.filter.PresenceNode node,
                         Store<org.apache.directory.shared.ldap.model.entry.Entry,ID> db,
                         org.apache.directory.shared.ldap.model.schema.SchemaManager schemaManager)
                  throws Exception

Throws:

Exception

Method Detail

getExpression

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

Description copied from interface: Evaluator

Gets the expression used by this expression Evaluator.

Specified by:

getExpression in interface Evaluator<org.apache.directory.shared.ldap.model.filter.PresenceNode,org.apache.directory.shared.ldap.model.entry.Entry,ID extends Comparable<ID>>

Returns:

the AST for the expression

getAttributeType

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

evaluate

public boolean evaluate(IndexEntry<?,ID> indexEntry)
                 throws Exception

Description copied from interface: Evaluator

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.shared.ldap.model.filter.PresenceNode,org.apache.directory.shared.ldap.model.entry.Entry,ID extends Comparable<ID>>

Parameters:

indexEntry - the index record of the entry to evaluate

Returns:

true if filter selects the candidate false otherwise

Throws:

Exception - if there are faults during evaluation

evaluateId

public boolean evaluateId(ID id)
                   throws Exception

Throws:

Exception

evaluateEntry

public boolean evaluateEntry(org.apache.directory.shared.ldap.model.entry.Entry entry)
                      throws Exception

Description copied from interface: Evaluator

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

Specified by:

evaluateEntry in interface Evaluator<org.apache.directory.shared.ldap.model.filter.PresenceNode,org.apache.directory.shared.ldap.model.entry.Entry,ID extends Comparable<ID>>

Parameters:

entry - the candidate entry

Returns:

true if filter selects the candidate false otherwise

Throws:

Exception - if there are faults during evaluation