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

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

All Implemented Interfaces:

Evaluator

public class ScopeEvaluator
extends java.lang.Object
implements Evaluator

Evaluates ScopeNode assertions on candidates using a database.

Version:

$Rev: 434579 $

Author:

Apache Directory Project

Constructor Summary

ScopeEvaluator(BTreePartition db)
Creates a scope node evaluator for search expressions.

Method Summary

boolean	assertOneLevelScope(org.apache.directory.shared.ldap.filter.ScopeNode node, java.math.BigInteger id) Asserts whether or not a candidate has one level scope while taking alias dereferencing into account.
boolean	assertSubtreeScope(org.apache.directory.shared.ldap.filter.ScopeNode node, java.math.BigInteger id) Asserts whether or not a candidate has one level scope while taking alias dereferencing into account.
boolean	evaluate(org.apache.directory.shared.ldap.filter.ExprNode node, IndexRecord record) Evaluates a candidate to determine if a filter expression selects it.

Methods inherited from class java.lang.Object

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

Constructor Detail

ScopeEvaluator

public ScopeEvaluator(BTreePartition db)

Creates a scope node evaluator for search expressions.

Parameters:

db - the database used to evaluate scope node

Method Detail

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, org.apache.directory.server.core.partition.impl.btree.IndexRecord)

assertSubtreeScope

public boolean assertSubtreeScope(org.apache.directory.shared.ldap.filter.ScopeNode node,
                                  java.math.BigInteger id)
                           throws javax.naming.NamingException

Asserts whether or not a candidate has one level scope while taking alias dereferencing into account.

Parameters:

node - the scope node containing the base and alias handling mode

id - the candidate to assert which can be any db entry's id

Returns:

true if the candidate is within one level scope whether or not alias dereferencing is enabled.

Throws:

javax.naming.NamingException - if the index lookups fail.

assertOneLevelScope

public boolean assertOneLevelScope(org.apache.directory.shared.ldap.filter.ScopeNode node,
                                   java.math.BigInteger id)
                            throws javax.naming.NamingException

Asserts whether or not a candidate has one level scope while taking alias dereferencing into account.

Parameters:

node - the scope node containing the base and alias handling mode

id - the candidate to assert which can be any db entry's id

Returns:

true if the candidate is within one level scope whether or not alias dereferencing is enabled.

Throws:

javax.naming.NamingException - if the index lookups fail.