com.solarmetric.kodo.runtime
Class PCDataImpl

java.lang.Object
  |
  +--com.solarmetric.kodo.runtime.PCDataImpl

All Implemented Interfaces:

PCData, Serializable

public class PCDataImpl

extends Object

implements PCData

Holds data about a single persistence capable instance.

See Also:

Serialized Form

Constructor Summary

PCDataImpl(Object oid, ClassMetaData meta)
Constructor.

PCDataImpl(StateManagerImpl sm)
Constructor.

Method Summary

boolean	checkVersion(StateManagerImpl sm) Returns true if the version of the given state manager matches the cached version.
Object	getData(int index) Returns the stored data value for the field at index.
Object	getIntermediate(int index) Returns the stored intermediate field value for the field at index, or null if none.
boolean	getLoaded(int index) Returns true if the field at index is loaded; else returns false.
Object	getOid() Returns the object ID of the data represented by this object.
Class	getType() Returns the type of the object represented by this data structure.
Object	getVersion() Returns the current version object that this data was loaded from.
void	load(StateManagerImpl sm) Loads all fields that are currently stored in the cache into the given state manager.
BitSet	load(StateManagerImpl sm, Object conn, BitSet fields, boolean setVersion) Loads some or all of the marked fields from the cache into the given state manager.
protected Object	lookup(PersistenceManagerImpl pm, Object oid) Find the PC corresponding to oid in the cache, using pm.
void	setData(int index, Object val) Sets the stored data value for the field at index to val.
void	setIntermediate(int index, Object val) Sets the stored intermediate field value at index to val.
void	setLoaded(int index, boolean loaded) Sets the loaded flag for the field at index.
void	setVersion(Object version) Sets the current version object that this data was loaded from.
void	store(StateManagerImpl sm) Stores all fields that are currently loaded in sm into the cache.
void	store(StateManagerImpl sm, BitSet fields) Stores all of the fields identified in fields.

Methods inherited from class java.lang.Object

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

Constructor Detail

PCDataImpl

public PCDataImpl(StateManagerImpl sm)

Constructor. Does not load or store any data.

PCDataImpl

public PCDataImpl(Object oid,
                  ClassMetaData meta)

Constructor. Useful when a StateManagerImpl is not available.

Method Detail

getOid

public Object getOid()

Description copied from interface: PCData

Returns the object ID of the data represented by this object.

Specified by:

getOid in interface PCData

getType

public Class getType()

Description copied from interface: PCData

Returns the type of the object represented by this data structure. This is a Class object, so client code that may use different class loaders should take care with this variable.

Specified by:

getType in interface PCData

getData

public Object getData(int index)

Returns the stored data value for the field at index. null could mean that the field is unset or that the field is set to null, so you should use getLoaded(int) to check the loaded status of the field.

Specified by:

getData in interface PCData

setData

public void setData(int index,
                    Object val)

Sets the stored data value for the field at index to val.

Specified by:

setData in interface PCData

getIntermediate

public Object getIntermediate(int index)

Description copied from interface: PCData

Returns the stored intermediate field value for the field at index, or null if none.

Specified by:

getIntermediate in interface PCData

setIntermediate

public void setIntermediate(int index,
                            Object val)

Description copied from interface: PCData

Sets the stored intermediate field value at index to val.

Specified by:

setIntermediate in interface PCData

getLoaded

public boolean getLoaded(int index)

Returns true if the field at index is loaded; else returns false.

Specified by:

getLoaded in interface PCData

setLoaded

public void setLoaded(int index,
                      boolean loaded)

Sets the loaded flag for the field at index.

Specified by:

setLoaded in interface PCData

getVersion

public Object getVersion()

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

Specified by:

getVersion in interface PCData

setVersion

public void setVersion(Object version)

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

Specified by:

setVersion in interface PCData

checkVersion

public boolean checkVersion(StateManagerImpl sm)

Returns true if the version of the given state manager matches the cached version.

Specified by:

checkVersion in interface PCData

load

public void load(StateManagerImpl sm)

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

Specified by:

load in interface PCData

Parameters:

sm - the state manager to load

load

public BitSet load(StateManagerImpl sm,
                   Object conn,
                   BitSet fields,
                   boolean setVersion)

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

Specified by:

load in interface PCData

Parameters:

sm - the state manager to load

conn - the connection information passed to the store manager

fields - the fields to load; all field bits that are successfully loaded from the cache will be cleared

setVersion - if the version information should be loaded

Returns:

a mask of the still unloaded fields

store

public void store(StateManagerImpl sm)

Stores all fields that are currently loaded in sm into the cache.

Specified by:

store in interface PCData

Parameters:

sm - the state manager to store

store

public void store(StateManagerImpl sm,
                  BitSet fields)

Description copied from interface: PCData

Stores all of the fields identified in fields.

Specified by:

store in interface PCData

Following copied from interface: com.solarmetric.kodo.runtime.PCData

Parameters:

sm - the state manager to store.

fields - the fields in sm to store.

lookup

protected Object lookup(PersistenceManagerImpl pm,
                        Object oid)

Find the PC corresponding to oid in the cache, using pm.