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 java.lang.Object
implements Evaluator<org.apache.directory.api.ldap.model.filter.PresenceNode>

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

Field Summary

Fields

Modifier and Type	Field and Description
private org.apache.directory.api.ldap.model.schema.AttributeType	attributeType The AttributeType we will use for the evaluation
private Store	db The backend
private Index<java.lang.String,java.lang.String>	idx The index to use if any
private org.apache.directory.api.ldap.model.filter.PresenceNode	node The ExprNode to evaluate
private org.apache.directory.api.ldap.model.schema.SchemaManager	schemaManager The SchemaManager instance

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)

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(IndexEntry<?,java.lang.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.
java.lang.String	toString()
java.lang.String	toString(java.lang.String tabs) Pretty-print an Evaluator

Methods inherited from class java.lang.Object

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

Field Detail

node

private final org.apache.directory.api.ldap.model.filter.PresenceNode node

The ExprNode to evaluate

db

private final Store db

The backend

attributeType

private final org.apache.directory.api.ldap.model.schema.AttributeType attributeType

The AttributeType we will use for the evaluation

schemaManager

private final org.apache.directory.api.ldap.model.schema.SchemaManager schemaManager

The SchemaManager instance

idx

private final Index<java.lang.String,java.lang.String> idx

The index to use if any

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)
                  throws java.lang.Exception

Throws:

java.lang.Exception

Method Detail

getExpression

public org.apache.directory.api.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.api.ldap.model.filter.PresenceNode>

Returns:

the AST for the expression

getAttributeType

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

evaluate

public boolean evaluate(IndexEntry<?,java.lang.String> indexEntry)
                 throws org.apache.directory.api.ldap.model.exception.LdapException

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.api.ldap.model.filter.PresenceNode>

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

evaluate

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

Description copied from interface: Evaluator

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

toString

public java.lang.String toString(java.lang.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 java.lang.String toString()

Overrides:

toString in class java.lang.Object

See Also:

Object.toString()