org.datanucleus.store

Class StoreDataManager

java.lang.Object

org.datanucleus.store.StoreDataManager

public class StoreDataManager
extends Object

Manager for store information. Keeps a record of which classes are managed by this datastore, and key information about how that class is handled.

Field Summary

Fields

Modifier and Type	Field and Description
protected Map<String,StoreData>	savedStoreDataByClass the memory image of schema data before running it
protected Map<String,StoreData>	storeDataByClass Map of all managed store data, keyed by the class/field name.

Constructor Summary

Constructors

Constructor and Description
StoreDataManager()

Method Summary

Modifier and Type	Method and Description
void	begin() Begin a transaction that changes the StoreData cache
void	clear() Clear the cache
void	commit() Commit the transaction changes to the StoreData cache
void	deregisterClass(String className)
StoreData	get(AbstractMemberMetaData mmd) Get the StoreData by the given field/property, if it has some specific store data component (join table).
StoreData	get(String className) Get the StoreData by the given className
Collection<StoreData>	getManagedStoreData() Accessor for the StoreData currently managed by this store.
StoreData[]	getStoreDataForProperties(String key1, Object value1, String key2, Object value2) Convenience accessor for all store data where property 1 has value1 and property 2 has value2.
boolean	managesClass(String className) Accessor for whether the specified class is managed currently
protected void	registerStoreData(StoreData data) Method to register some data with the store.
void	rollback() Rollback the transaction changes to the StoreData cache
int	size() Accessor to the number of StoreData in cache

Methods inherited from class java.lang.Object

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

Field Detail

storeDataByClass

protected Map<String,StoreData> storeDataByClass

Map of all managed store data, keyed by the class/field name.

savedStoreDataByClass

protected Map<String,StoreData> savedStoreDataByClass

the memory image of schema data before running it

Constructor Detail

StoreDataManager

public StoreDataManager()

Method Detail

clear

public void clear()

Clear the cache

deregisterClass

public void deregisterClass(String className)

registerStoreData

protected void registerStoreData(StoreData data)

Method to register some data with the store.

Parameters:

data - The StoreData to add

getStoreDataForProperties

public StoreData[] getStoreDataForProperties(String key1,
                                             Object value1,
                                             String key2,
                                             Object value2)

Convenience accessor for all store data where property 1 has value1 and property 2 has value2. Uses equals() on the values. Doesn't cater for null values.

Parameters:

key1 - Property 1 name

value1 - Property 1 value

key2 - Property 2 name

value2 - Property 2 value

Returns:

Store data with the specified property values

managesClass

public boolean managesClass(String className)

Accessor for whether the specified class is managed currently

Parameters:

className - The name of the class

Returns:

Whether it is managed

getManagedStoreData

public Collection<StoreData> getManagedStoreData()

Accessor for the StoreData currently managed by this store.

Returns:

Collection of the StoreData being managed

get

public StoreData get(String className)

Get the StoreData by the given className

Parameters:

className - the fully qualified class name

Returns:

the StoreData

get

public StoreData get(AbstractMemberMetaData mmd)

Get the StoreData by the given field/property, if it has some specific store data component (join table).

Parameters:

mmd - metadata for the the field/property

Returns:

the StoreData

size

public int size()

Accessor to the number of StoreData in cache

Returns:

the number of StoreData in cache

begin

public void begin()

Begin a transaction that changes the StoreData cache

rollback

public void rollback()

Rollback the transaction changes to the StoreData cache

commit

public void commit()

Commit the transaction changes to the StoreData cache