org.apache.openjpa.kernel

Interface PCData

All Superinterfaces:

Serializable

All Known Subinterfaces:

DataCachePCData, PCDataGenerator.DynamicPCData

All Known Implementing Classes:

AbstractPCData, DataCachePCDataImpl, PCDataImpl

public interface PCData
extends Serializable

Holds data about a single persistence capable instance. This interface is used in the caching framework, and may also be used by simple store manager back-ends to hold persistent state.

Author:

Patrick Linskey

Method Summary

Modifier and Type	Method and Description
String	getCache() Get the name of the cache where this data is stored.
Object	getData(int i) Return the data stored in the given field index.
Object	getId() Return the id of this instance.
Object	getImplData() Returns the instance-level impl data, or null if none.
Class	getType() Return the type of this instance.
Object	getVersion() Returns the current version object that this data was loaded from.
boolean	isLoaded(int i) Whether the given field index has stored data.
void	load(OpenJPAStateManager sm, BitSet fields, FetchConfiguration fetch, Object context) Loads some or all of the marked fields from the cache into the given state manager.
void	load(OpenJPAStateManager sm, FetchConfiguration fetch, Object context) Loads all fields that are currently stored in the cache into the given state manager.
void	setImplData(Object val) Sets the stored instance-level impl data.
void	setVersion(Object version) Sets the current version object that this data was loaded from.
void	store(OpenJPAStateManager sm) Store all loaded fields of the state manager.
void	store(OpenJPAStateManager sm, BitSet fields) Store the given fields from the state manager.

Method Detail

getId

Object getId()

Return the id of this instance.

getType

Class getType()

Return the type of this instance.

getImplData

Object getImplData()

Returns the instance-level impl data, or null if none.

setImplData

void setImplData(Object val)

Sets the stored instance-level impl data.

getVersion

Object getVersion()

Returns the current version object that this data was loaded from.

setVersion

void setVersion(Object version)

Sets the current version object that this data was loaded from.

load

void load(OpenJPAStateManager sm,
          FetchConfiguration fetch,
          Object context)

Loads all fields that are currently stored in the cache into the given state manager.

Parameters:

sm - the state manager to load

fetch - the fetch configuration to use for loading related objects

context - current context information

load

void load(OpenJPAStateManager sm,
          BitSet fields,
          FetchConfiguration fetch,
          Object context)

Loads some or all of the marked fields from the cache into the given state manager.

Parameters:

sm - the state manager to load

fields - the fields to load; clear the bits for the fields that are successfully loaded

fetch - the fetch configuration to use for loading related objects

context - current context information

store

void store(OpenJPAStateManager sm)

Store all loaded fields of the state manager.

store

void store(OpenJPAStateManager sm,
           BitSet fields)

Store the given fields from the state manager.

getData

Object getData(int i)

Return the data stored in the given field index.

isLoaded

boolean isLoaded(int i)

Whether the given field index has stored data.

getCache

String getCache()

Get the name of the cache where this data is stored.