org.apache.ojb.broker.accesslayer
Class PlainPrefetcher

java.lang.Object
  org.apache.ojb.broker.accesslayer.BasePrefetcher
      org.apache.ojb.broker.accesslayer.PlainPrefetcher

All Implemented Interfaces:

RelationshipPrefetcher

public class PlainPrefetcher
extends BasePrefetcher

Prefetcher for plain list of objects (no relations).

Version:

$Id: PlainPrefetcher.java,v 1.1 2007-08-24 22:17:30 ewestfal Exp $

Author:

Oleg Nitz

Field Summary

Fields inherited from class org.apache.ojb.broker.accesslayer.BasePrefetcher

IN_LIMIT, itemClassDesc, pkLimit

Constructor Summary

PlainPrefetcher(PersistenceBrokerImpl aBroker, Class anItemClass)

Method Summary

protected void	associateBatched(Collection proxies, Collection realSubjects) associate the batched Children with their owner object
protected Query[]	buildPrefetchQueries(Collection proxies, Collection realSubjects) Build the multiple queries for one relationship because of limitation of IN(...)
protected Query	buildPrefetchQuery(Class clazz, Collection ids, boolean withExtents)
void	prepareRelationshipSettings() Prepare the Relationship for prefetch (ie: disable auto-retrieve)
void	restoreRelationshipSettings() Restore the Relationship settings(ie: enable auto-retrieve)

Methods inherited from class org.apache.ojb.broker.accesslayer.BasePrefetcher

buildPrefetchCriteria, buildPrefetchQuery, buildPrefetchQuery, getBroker, getDescriptorRepository, getItemClassDescriptor, getLimit, getLogger, prefetchRelationship

Methods inherited from class java.lang.Object

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

Constructor Detail

PlainPrefetcher

public PlainPrefetcher(PersistenceBrokerImpl aBroker,
                       Class anItemClass)

Method Detail

prepareRelationshipSettings

public void prepareRelationshipSettings()

Description copied from interface: RelationshipPrefetcher

Prepare the Relationship for prefetch (ie: disable auto-retrieve)

restoreRelationshipSettings

public void restoreRelationshipSettings()

Description copied from interface: RelationshipPrefetcher

Restore the Relationship settings(ie: enable auto-retrieve)

associateBatched

protected void associateBatched(Collection proxies,
                                Collection realSubjects)

Description copied from class: BasePrefetcher

associate the batched Children with their owner object

Specified by:

associateBatched in class BasePrefetcher

buildPrefetchQueries

protected Query[] buildPrefetchQueries(Collection proxies,
                                       Collection realSubjects)

Build the multiple queries for one relationship because of limitation of IN(...)

Specified by:

buildPrefetchQueries in class BasePrefetcher

Parameters:

proxies - Collection containing all proxy objects to load

realSubjects - Collection where real subjects found in the cache should be added.

buildPrefetchQuery

protected Query buildPrefetchQuery(Class clazz,
                                   Collection ids,
                                   boolean withExtents)