org.apache.directory.server.xdbm.search.impl
Class AndEvaluator<ID>

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

All Implemented Interfaces:

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

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

An Evaluator for logical conjunction (AND) expressions.

Author:

Apache Directory Project

Constructor Summary

AndEvaluator(org.apache.directory.shared.ldap.model.filter.AndNode node, List<Evaluator<? extends org.apache.directory.shared.ldap.model.filter.ExprNode,org.apache.directory.shared.ldap.model.entry.Entry,ID>> evaluators)
Creates an instance of AndEvaluator

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 .
org.apache.directory.shared.ldap.model.filter.AndNode	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

AndEvaluator

public AndEvaluator(org.apache.directory.shared.ldap.model.filter.AndNode node,
                    List<Evaluator<? extends org.apache.directory.shared.ldap.model.filter.ExprNode,org.apache.directory.shared.ldap.model.entry.Entry,ID>> evaluators)

Creates an instance of AndEvaluator

Parameters:

node - The And Node

evaluators - The list of evaluators for all the contaned nodes

Method Detail

evaluateEntry

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

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.AndNode,org.apache.directory.shared.ldap.model.entry.Entry,ID>

Parameters:

entry - the candidate entry

Returns:

true if filter selects the candidate false otherwise

Throws:

Exception - if there are faults during evaluation

evaluate

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

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.AndNode,org.apache.directory.shared.ldap.model.entry.Entry,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

getExpression

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

Gets the expression used by this expression Evaluator.

Specified by:

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

Returns:

the AST for the expression