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

Class ApproximateEvaluator<T>

java.lang.Object

org.apache.directory.server.xdbm.search.evaluator.LeafEvaluator<T>

org.apache.directory.server.xdbm.search.evaluator.ApproximateEvaluator<T>

All Implemented Interfaces:

Evaluator<org.apache.directory.api.ldap.model.filter.SimpleNode<T>>

public class ApproximateEvaluator<T>
extends LeafEvaluator<T>

An Evaluator which determines if candidates are matched by ApproximateNode assertions. Same as equality for now.

Author:

Apache Directory Project

Field Summary

Fields inherited from class org.apache.directory.server.xdbm.search.evaluator.LeafEvaluator

attributeType, db, idx, ldapComparator, node, normalizer, schemaManager

Constructor Summary

Constructors

Constructor and Description
ApproximateEvaluator(org.apache.directory.api.ldap.model.filter.ApproximateNode<T> node, Store db, org.apache.directory.api.ldap.model.schema.SchemaManager schemaManager) Creates a new ApproximateEvaluator

Method Summary

Methods

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(IndexEntry<?,String> indexEntry) Evaluates a candidate to determine if a filter expression selects it.
org.apache.directory.api.ldap.model.filter.ApproximateNode<T>	getExpression() Gets the expression used by this expression Evaluator.
String	toString()
String	toString(String tabs) Pretty-print an Evaluator

Methods inherited from class org.apache.directory.server.xdbm.search.evaluator.LeafEvaluator

getAttributeType, getComparator, getNormalizer

Methods inherited from class java.lang.Object

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

Constructor Detail

ApproximateEvaluator

public ApproximateEvaluator(org.apache.directory.api.ldap.model.filter.ApproximateNode<T> node,
                    Store db,
                    org.apache.directory.api.ldap.model.schema.SchemaManager schemaManager)
                     throws Exception

Creates a new ApproximateEvaluator

Parameters:

node - The ApproximateNode

db - The Store

schemaManager - The SchemaManager

Throws:

Exception - If the creation failed

Method Detail

getExpression

public org.apache.directory.api.ldap.model.filter.ApproximateNode<T> getExpression()

Gets the expression used by this expression Evaluator.

Returns:

the AST for the expression

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 .

Parameters:

entry - the candidate entry

Returns:

true if filter selects the candidate false otherwise

Throws:

org.apache.directory.api.ldap.model.exception.LdapException

evaluate

public boolean evaluate(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.

Parameters:

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

toString

public String toString(String tabs)

Description copied from interface: Evaluator

Pretty-print an Evaluator

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 LeafEvaluator<T>

See Also:

Object.toString()