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

Class NoOpOptimizer

java.lang.Object

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

All Implemented Interfaces:

Optimizer

public class NoOpOptimizer
extends Object
implements Optimizer

A do nothing optimizer which labels all nodes with BigInteger.valueOf( Integer.MAX_VALUE ) , instead of actually taking scan counts.

Author:

Apache Directory Project

Constructor Summary

Constructors

Constructor and Description
NoOpOptimizer()

Method Summary

Modifier and Type	Method and Description
Long	annotate(org.apache.directory.server.core.api.partition.PartitionTxn partitionTxn, org.apache.directory.api.ldap.model.filter.ExprNode node) Annotates the expression node tree for optimized traversal metrics.

Methods inherited from class java.lang.Object

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

Constructor Detail

NoOpOptimizer

public NoOpOptimizer()

Method Detail

annotate

public Long annotate(org.apache.directory.server.core.api.partition.PartitionTxn partitionTxn,
                     org.apache.directory.api.ldap.model.filter.ExprNode node)
              throws org.apache.directory.api.ldap.model.exception.LdapException

Description copied from interface: Optimizer

Annotates the expression node tree for optimized traversal metrics.

Specified by:

annotate in interface Optimizer

Parameters:

partitionTxn - The transaction to use

node - the root of the expression node tree

Returns:

The computed value for this node

Throws:

org.apache.directory.api.ldap.model.exception.LdapException - if there are failures while optimizing