org.jpox.store.rdbms.extent
Class ClassViewExtent

java.lang.Object
  org.jpox.store.AbstractExtent
      org.jpox.store.rdbms.extent.AbstractRDBMSExtent
          org.jpox.store.rdbms.extent.ClassViewExtent

All Implemented Interfaces:

org.jpox.store.Extent, org.jpox.store.mapped.query.Queryable

public class ClassViewExtent
extends AbstractRDBMSExtent
implements org.jpox.store.mapped.query.Queryable

An Extent of all persistent objects backed by a view.

Version:

$Revision: 1.21 $

Field Summary

protected static org.jpox.util.Localiser

LOCALISER_RDBMS Localised messages

Fields inherited from class org.jpox.store.rdbms.extent.AbstractRDBMSExtent

query, queryResultsByIterator

Fields inherited from class org.jpox.store.AbstractExtent

candidateClass, cmd, LOCALISER, om, storeMgr, subclasses

Constructor Summary

ClassViewExtent(org.jpox.ObjectManager om, org.jpox.store.mapped.DatastoreClass view, java.lang.Class cls, boolean subclasses, org.jpox.metadata.AbstractClassMetaData cmd)
Constructor.

Method Summary

boolean	isEmpty() Returns true if this collection contains no elements.
org.jpox.store.mapped.expression.QueryExpression	newQueryStatement() Create a new query to search for the candidate classes etc.
org.jpox.store.mapped.expression.QueryExpression	newQueryStatement(java.lang.Class candidateClass, org.jpox.store.mapped.DatastoreIdentifier candidateAlias) Create a query to search for the candidateClass and subclasses if true
org.jpox.store.query.ResultObjectFactory	newResultObjectFactory(org.jpox.store.mapped.expression.QueryExpression stmt, boolean ignoreCache, java.lang.Class resultClass, boolean useFetchPlan) Create a new factory for objects from the ResultSet.

Methods inherited from class org.jpox.store.rdbms.extent.AbstractRDBMSExtent

close, closeAll, getFetchPlan, iterator

Methods inherited from class org.jpox.store.AbstractExtent

getCandidateClass, getObjectManager, hasSubclasses, toString

Methods inherited from class java.lang.Object

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

Field Detail

LOCALISER_RDBMS

protected static final org.jpox.util.Localiser LOCALISER_RDBMS

Localised messages

Constructor Detail

ClassViewExtent

public ClassViewExtent(org.jpox.ObjectManager om,
                       org.jpox.store.mapped.DatastoreClass view,
                       java.lang.Class cls,
                       boolean subclasses,
                       org.jpox.metadata.AbstractClassMetaData cmd)

Constructor.

Parameters:

om - Persistence Manager

view - The view

cls - Candidate class

subclasses - Whether to include subclasses

cmd - MetaData for the candidate class

Method Detail

newQueryStatement

public org.jpox.store.mapped.expression.QueryExpression newQueryStatement()

Create a new query to search for the candidate classes etc.

Specified by:

newQueryStatement in interface org.jpox.store.mapped.query.Queryable

Returns:

The new QueryStatement.

newQueryStatement

public org.jpox.store.mapped.expression.QueryExpression newQueryStatement(java.lang.Class candidateClass,
                                                                          org.jpox.store.mapped.DatastoreIdentifier candidateAlias)

Create a query to search for the candidateClass and subclasses if true

Specified by:

newQueryStatement in interface org.jpox.store.mapped.query.Queryable

Parameters:

candidateClass - The class to use

candidateAlias - Alias for the candidate

Returns:

The new QueryStatement

newResultObjectFactory

public org.jpox.store.query.ResultObjectFactory newResultObjectFactory(org.jpox.store.mapped.expression.QueryExpression stmt,
                                                                       boolean ignoreCache,
                                                                       java.lang.Class resultClass,
                                                                       boolean useFetchPlan)

Create a new factory for objects from the ResultSet.

Specified by:

newResultObjectFactory in interface org.jpox.store.mapped.query.Queryable

Parameters:

stmt - The Query Statement

ignoreCache - Whether to ignore dirty objects

resultClass - Whether to create objects of a particular class

useFetchPlan - whether to use the fetch plan to retrieve fields in the same query

Returns:

The result object factory

isEmpty

public boolean isEmpty()

Returns true if this collection contains no elements.

Specified by:

isEmpty in interface org.jpox.store.mapped.query.Queryable

Returns:

true if this collection contains no elements.