com.sun.jdo.spi.persistence.support.sqlstore

Class SQLStoreManager

java.lang.Object

com.sun.jdo.spi.persistence.support.sqlstore.SQLStoreManager

All Implemented Interfaces:

PersistenceStore

public class SQLStoreManager
extends Object
implements PersistenceStore

This class connects to a persistent store. It supports relational databases such as Oracle and MS SQLServer. This class knows how to generate SQL statements to access and manipulate objects stored in a relational database.

Constructor Summary

Constructors

Constructor and Description
SQLStoreManager(DatabaseMetaData databaseMetaData, String identifier)

Method Summary

Modifier and Type	Method and Description
void	execute(PersistenceManager pm, Collection actions) Executes the list of SQL requests contained in actions.
void	executeBatch(PersistenceManager pm, UpdateObjectDesc request, boolean forceFlush) Retrieves the update query plan for the specified request and calls executeUpdateBatch for all statements in this plan.
Class	getClassByOidClass(Class oidType)
ConfigCache	getConfigCache() Returns ConfigCache associated with this store.
PersistenceConfig	getPersistenceConfig(Class classType) Returns the sqlstore model for class classType.
RetrieveDesc	getRetrieveDesc(Class classType) Returns a new retrieve descriptor for anexternal (user) query.
RetrieveDesc	getRetrieveDesc(String fieldName, Class classType) Returns a new retrieve descriptor for anexternal (user) query.
StateManager	getStateManager(Class classType)
UpdateObjectDesc	getUpdateObjectDesc(Class classType)
DBVendorType	getVendorType()
Object	retrieve(PersistenceManager pm, RetrieveDesc action, ValueFetcher parameters) The retrieve method builds and executes the SQL query described by the action parameter.

Methods inherited from class java.lang.Object

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

Constructor Detail

SQLStoreManager

public SQLStoreManager(DatabaseMetaData databaseMetaData,
                       String identifier)

Parameters:

databaseMetaData - Instance of DatabaseMetaData

identifier - identifier of the caller creating a new instance of SQLStoreManager. Typically this is identifier of PersistenceManagerFacory initializing this SQLStoreManager.

Method Detail

getPersistenceConfig

public PersistenceConfig getPersistenceConfig(Class classType)

Returns the sqlstore model for class classType. Sqlstore model information is cached. If the model cache does not already hold a model instance for the particular class, a new instance is created, initialized and put into the cache. The access to the model cache is synchronized.

Specified by:

getPersistenceConfig in interface PersistenceStore

getConfigCache

public ConfigCache getConfigCache()

Description copied from interface: PersistenceStore

Returns ConfigCache associated with this store.

Specified by:

getConfigCache in interface PersistenceStore

Returns:

ConfigCache associated with this store.

execute

public void execute(PersistenceManager pm,
                    Collection actions)

Executes the list of SQL requests contained in actions. Requests can be INSERT, UPDATE or DELETE operations.

Specified by:

execute in interface PersistenceStore

Throws:

JDODataStoreException - Will be thrown in case of errors or if the affected rows are less than the minimum rows required.

getClassByOidClass

public Class getClassByOidClass(Class oidType)

Specified by:

getClassByOidClass in interface PersistenceStore

getStateManager

public StateManager getStateManager(Class classType)

Specified by:

getStateManager in interface PersistenceStore

getRetrieveDesc

public RetrieveDesc getRetrieveDesc(Class classType)

Returns a new retrieve descriptor for anexternal (user) query.

Specified by:

getRetrieveDesc in interface PersistenceStore

Parameters:

classType - Type of the persistence capable class to be queried.

Returns:

A new retrieve descriptor for anexternal (user) query.

getRetrieveDesc

public RetrieveDesc getRetrieveDesc(String fieldName,
                                    Class classType)

Returns a new retrieve descriptor for anexternal (user) query. This retrieve descriptor can be used to query for the foreign field name.

Specified by:

getRetrieveDesc in interface PersistenceStore

Parameters:

fieldName - Name of the foreign field to be queried.

classType - Persistence capable class including fieldName.

Returns:

A new retrieve descriptor for anexternal (user) query.

getUpdateObjectDesc

public UpdateObjectDesc getUpdateObjectDesc(Class classType)

Specified by:

getUpdateObjectDesc in interface PersistenceStore

getVendorType

public DBVendorType getVendorType()

retrieve

public Object retrieve(PersistenceManager pm,
                       RetrieveDesc action,
                       ValueFetcher parameters)

The retrieve method builds and executes the SQL query described by the action parameter.

Specified by:

retrieve in interface PersistenceStore

Parameters:

action - The action parameter holds the RetrieveDesc describing what should be selected from the database.

parameters - Query parameters.

executeBatch

public void executeBatch(PersistenceManager pm,
                         UpdateObjectDesc request,
                         boolean forceFlush)

Retrieves the update query plan for the specified request and calls executeUpdateBatch for all statements in this plan.

Specified by:

executeBatch in interface PersistenceStore

Parameters:

pm - the persistence manager

request - the request corresponding with the current state manager

forceFlush - all in the update query plan must be executed