org.apache.directory.server.xdbm.search.impl

Class CursorBuilder

java.lang.Object

org.apache.directory.server.xdbm.search.impl.CursorBuilder

public class CursorBuilder
extends java.lang.Object

Builds Cursors over candidates that satisfy a filter expression.

Field Summary

Fields

Modifier and Type	Field and Description
private Store	db The database used by this builder
private EvaluatorBuilder	evaluatorBuilder Evaluator dependency on a EvaluatorBuilder

Constructor Summary

Constructors

Constructor and Description
CursorBuilder(Store db, EvaluatorBuilder evaluatorBuilder) Creates an expression tree enumerator.

Method Summary

Modifier and Type	Method and Description
<T> long	build(org.apache.directory.api.ldap.model.filter.ExprNode node, PartitionSearchResult searchResult)
private long	computeAnd(org.apache.directory.api.ldap.model.filter.AndNode node, PartitionSearchResult searchResult) Creates an AndCursor over a conjunction expression branch node.
private <T> long	computeApproximate(org.apache.directory.api.ldap.model.filter.ApproximateNode<T> node, PartitionSearchResult searchResult) Computes the set of candidates for an Approximate filter.
private <T> long	computeEquality(org.apache.directory.api.ldap.model.filter.EqualityNode<T> node, PartitionSearchResult searchResult) Computes the set of candidates for an Equality filter.
private <T> long	computeGreaterEq(org.apache.directory.api.ldap.model.filter.GreaterEqNode<T> node, PartitionSearchResult searchResult) Computes the set of candidates for an GreateEq filter.
private <T> long	computeLessEq(org.apache.directory.api.ldap.model.filter.LessEqNode<T> node, PartitionSearchResult searchResult) Computes the set of candidates for an LessEq filter.
private long	computeNot(org.apache.directory.api.ldap.model.filter.NotNode node, PartitionSearchResult searchResult) Creates an AndCursor over a conjunction expression branch node.
private long	computeOneLevelScope(org.apache.directory.api.ldap.model.filter.ScopeNode node, PartitionSearchResult searchResult) Computes the set of candidates for a OneLevelScope filter.
private <T> long	computeOr(org.apache.directory.api.ldap.model.filter.OrNode node, PartitionSearchResult searchResult) Creates a OrCursor over a disjunction expression branch node.
private <T> long	computePresence(org.apache.directory.api.ldap.model.filter.PresenceNode node, PartitionSearchResult searchResult) Computes the set of candidates for a Presence filter.
private long	computeSubLevelScope(org.apache.directory.api.ldap.model.filter.ScopeNode node, PartitionSearchResult searchResult) Computes the set of candidates for a SubLevelScope filter.
private long	computeSubstring(org.apache.directory.api.ldap.model.filter.SubstringNode node, PartitionSearchResult searchResult) Computes the set of candidates for an Substring filter.

Methods inherited from class java.lang.Object

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

Field Detail

db

private Store db

The database used by this builder

evaluatorBuilder

private EvaluatorBuilder evaluatorBuilder

Evaluator dependency on a EvaluatorBuilder

Constructor Detail

CursorBuilder

public CursorBuilder(Store db,
                     EvaluatorBuilder evaluatorBuilder)

Creates an expression tree enumerator.

Parameters:

db - database used by this enumerator

evaluatorBuilder - the evaluator builder

Method Detail

build

public <T> long build(org.apache.directory.api.ldap.model.filter.ExprNode node,
                      PartitionSearchResult searchResult)
               throws java.lang.Exception

Throws:

java.lang.Exception

computeApproximate

private <T> long computeApproximate(org.apache.directory.api.ldap.model.filter.ApproximateNode<T> node,
                                    PartitionSearchResult searchResult)
                             throws java.lang.Exception

Computes the set of candidates for an Approximate filter. We will feed the set only if we have an index for the AT.

Throws:

java.lang.Exception

computeEquality

private <T> long computeEquality(org.apache.directory.api.ldap.model.filter.EqualityNode<T> node,
                                 PartitionSearchResult searchResult)
                          throws java.lang.Exception

Computes the set of candidates for an Equality filter. We will feed the set only if we have an index for the AT.

Throws:

java.lang.Exception

computeGreaterEq

private <T> long computeGreaterEq(org.apache.directory.api.ldap.model.filter.GreaterEqNode<T> node,
                                  PartitionSearchResult searchResult)
                           throws java.lang.Exception

Computes the set of candidates for an GreateEq filter. We will feed the set only if we have an index for the AT.

Throws:

java.lang.Exception

computeLessEq

private <T> long computeLessEq(org.apache.directory.api.ldap.model.filter.LessEqNode<T> node,
                               PartitionSearchResult searchResult)
                        throws java.lang.Exception

Computes the set of candidates for an LessEq filter. We will feed the set only if we have an index for the AT.

Throws:

java.lang.Exception

computePresence

private <T> long computePresence(org.apache.directory.api.ldap.model.filter.PresenceNode node,
                                 PartitionSearchResult searchResult)
                          throws java.lang.Exception

Computes the set of candidates for a Presence filter. We will feed the set only if we have an index for the AT.

Throws:

java.lang.Exception

computeOneLevelScope

private long computeOneLevelScope(org.apache.directory.api.ldap.model.filter.ScopeNode node,
                                  PartitionSearchResult searchResult)
                           throws java.lang.Exception

Computes the set of candidates for a OneLevelScope filter. We will feed the set only if we have an index for the AT.

Throws:

java.lang.Exception

computeSubLevelScope

private long computeSubLevelScope(org.apache.directory.api.ldap.model.filter.ScopeNode node,
                                  PartitionSearchResult searchResult)
                           throws java.lang.Exception

Computes the set of candidates for a SubLevelScope filter. We will feed the set only if we have an index for the AT.

Throws:

java.lang.Exception

computeSubstring

private long computeSubstring(org.apache.directory.api.ldap.model.filter.SubstringNode node,
                              PartitionSearchResult searchResult)
                       throws java.lang.Exception

Computes the set of candidates for an Substring filter. We will feed the set only if we have an index for the AT.

Throws:

java.lang.Exception

computeOr

private <T> long computeOr(org.apache.directory.api.ldap.model.filter.OrNode node,
                           PartitionSearchResult searchResult)
                    throws java.lang.Exception

Creates a OrCursor over a disjunction expression branch node.

Parameters:

node - the disjunction expression branch node

Returns:

Cursor over candidates satisfying disjunction expression

Throws:

java.lang.Exception - on db access failures

computeAnd

private long computeAnd(org.apache.directory.api.ldap.model.filter.AndNode node,
                        PartitionSearchResult searchResult)
                 throws java.lang.Exception

Creates an AndCursor over a conjunction expression branch node.

Parameters:

node - a conjunction expression branch node

Returns:

Cursor over the conjunction expression

Throws:

java.lang.Exception - on db access failures

computeNot

private long computeNot(org.apache.directory.api.ldap.model.filter.NotNode node,
                        PartitionSearchResult searchResult)
                 throws java.lang.Exception

Creates an AndCursor over a conjunction expression branch node.

Parameters:

node - a conjunction expression branch node

Returns:

Cursor over the conjunction expression

Throws:

java.lang.Exception - on db access failures