JdoTemplate (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.orm.jdo
Class JdoTemplate

java.lang.Object
  org.springframework.orm.jdo.JdoAccessor
      org.springframework.orm.jdo.JdoTemplate

All Implemented Interfaces:: InitializingBean, JdoOperations

public class JdoTemplate
extends JdoAccessor
implements JdoOperations
extends JdoAccessor
implements JdoOperations

Helper class that simplifies JDO data access code, and converts JDOExceptions into Spring DataAccessExceptions, following the org.springframework.dao exception hierarchy.

The central method is execute, supporting JDO access code implementing the JdoCallback interface. It provides JDO PersistenceManager handling such that neither the JdoCallback implementation nor the calling code needs to explicitly care about retrieving/closing PersistenceManagers, or handling JDO lifecycle exceptions.

Typically used to implement data access or business logic services that use JDO within their implementation but are JDO-agnostic in their interface. The latter or code calling the latter only have to deal with business objects, query objects, and org.springframework.dao exceptions.

Can be used within a service implementation via direct instantiation with a PersistenceManagerFactory reference, or get prepared in an application context and given to services as bean reference. Note: The PersistenceManagerFactory should always be configured as bean in the application context, in the first case given to the service directly, in the second case to the prepared template.

This class can be considered as direct alternative to working with the raw JDO PersistenceManager API (through PersistenceManagerFactoryUtils.getPersistenceManager()). The major advantage is its automatic conversion to DataAccessExceptions, the major disadvantage that no checked application exceptions can get thrown from within data access code. Corresponding checks and the actual throwing of such exceptions can often be deferred to after callback execution, though.

Note that even if JdoTransactionManager is used for transaction demarcation in higher-level services, all those services above the data access layer don't need to be JDO-aware. Setting such a special PlatformTransactionManager is a configuration issue, without introducing code dependencies: For example, switching to JTA is just a matter of Spring configuration (use JtaTransactionManager instead) and JDO provider configuration, neither affecting application code.

LocalPersistenceManagerFactoryBean is the preferred way of obtaining a reference to a specific PersistenceManagerFactory, at least in a non-EJB environment. The Spring application context will manage its lifecycle, initializing and shutting down the factory as part of the application.

Note that lazy loading will just work with an open JDO PersistenceManager, either within a Spring-driven transaction (with JdoTransactionManager or JtaTransactionManager) or within OpenPersistenceManagerInViewFilter/Interceptor. Furthermore, some operations just make sense within transactions, for example: evict, evictAll, flush.

NOTE: This class is compatible with both JDO 1.0 and JDO 2.0, as far as possible. It uses reflection to adapt to the actual API present on the class path (concretely: for the newObjectIdInstance, makePersistent and makePersistentAll methods). Make sure that the JDO API jar on your class path matches the one that your JDO provider has been compiled against!

Since:: 03.06.2003
Author:: Juergen Hoeller
See Also:: JdoAccessor.setPersistenceManagerFactory(javax.jdo.PersistenceManagerFactory), JdoCallback, PersistenceManager, JdoInterceptor, LocalPersistenceManagerFactoryBean, JndiObjectFactoryBean, JdoTransactionManager, JtaTransactionManager, OpenPersistenceManagerInViewFilter, OpenPersistenceManagerInViewInterceptor

Field Summary

Fields inherited from class org.springframework.orm.jdo.JdoAccessor

logger

Constructor Summary

JdoTemplate()
          Create a new JdoTemplate instance.

JdoTemplate(javax.jdo.PersistenceManagerFactory pmf)
          Create a new JdoTemplate instance.

JdoTemplate(javax.jdo.PersistenceManagerFactory pmf, boolean allowCreate)
          Create a new JdoTemplate instance.

Method Summary

Object attachCopy(Object detachedEntity)
          Reattach the given detached instance (for example, a web form object) with the current JDO transaction, merging its changes into the current persistence instance that represents the corresponding entity.

Collection attachCopyAll(Collection detachedEntities)
          Reattach the given detached instances (for example, web form objects) with the current JDO transaction, merging their changes into the current persistence instances that represent the corresponding entities.

protected javax.jdo.PersistenceManager createPersistenceManagerProxy(javax.jdo.PersistenceManager pm)
          Create a close-suppressing proxy for the given JDO PersistenceManager.

void deletePersistent(Object entity)
          Delete the given persistent instance.

void deletePersistentAll(Collection entities)
          Delete all given persistent instances.

Object detachCopy(Object entity)
          Detach a copy of the given persistent instance from the current JDO transaction, for use outside a JDO transaction (for example, as web form object).

Collection detachCopyAll(Collection entities)
          Detach copies of the given persistent instances from the current JDO transaction, for use outside a JDO transaction (for example, as web form objects).

void evict(Object entity)
          Remove the given object from the PersistenceManager cache.

void evictAll()
          Remove all objects from the PersistenceManager cache.

void evictAll(Collection entities)
          Remove all given objects from the PersistenceManager cache.

Object execute(JdoCallback action)
          Execute the action specified by the given action object within a PersistenceManager.

Object execute(JdoCallback action, boolean exposeNativePersistenceManager)
          Execute the action specified by the given action object within a PersistenceManager.

Collection executeFind(JdoCallback action)
          Execute the specified action assuming that the result object is a Collection.

Collection find(Class entityClass)
          Find all persistent instances of the given class.

Collection find(Class entityClass, String filter)
          Find all persistent instances of the given class that match the given JDOQL filter.

Collection find(Class entityClass, String filter, String ordering)
          Find all persistent instances of the given class that match the given JDOQL filter, with the given result ordering.

Collection find(Class entityClass, String filter, String parameters, Map values)
          Find all persistent instances of the given class that match the given JDOQL filter, using the given parameter declarations and parameter values.

Collection find(Class entityClass, String filter, String parameters, Map values, String ordering)
          Find all persistent instances of the given class that match the given JDOQL filter, using the given parameter declarations and parameter values, with the given result ordering.

Collection find(Class entityClass, String filter, String parameters, Object[] values)
          Find all persistent instances of the given class that match the given JDOQL filter, using the given parameter declarations and parameter values.

Collection find(Class entityClass, String filter, String parameters, Object[] values, String ordering)
          Find all persistent instances of the given class that match the given JDOQL filter, using the given parameter declarations and parameter values, with the given result ordering.

Collection find(String queryString)
          Find persistent instances through the given single-string JDOQL query.

Collection find(String queryString, Map values)
          Find persistent instances through the given single-string JDOQL query.

Collection find(String language, Object queryObject)
          Find persistent instances through the given query object in the specified query language.

Collection find(String queryString, Object[] values)
          Find persistent instances through the given single-string JDOQL query.

Collection findByNamedQuery(Class entityClass, String queryName)
          Find persistent instances through the given named query.

Collection findByNamedQuery(Class entityClass, String queryName, Map values)
          Find persistent instances through the given named query.

Collection findByNamedQuery(Class entityClass, String queryName, Object[] values)
          Find persistent instances through the given named query.

void flush()
          Flush all transactional modifications to the database.

Object getObjectById(Class entityClass, Object idValue)
          Return the persistent instance of the given entity class with the given id value, throwing an exception if not found.

Object getObjectById(Object objectId)
          Return the persistent instance with the given JDO object id, throwing an exception if not found.

boolean isAllowCreate()
          Return if a new PersistenceManager should be created if no thread-bound found.

boolean isExposeNativePersistenceManager()
          Return whether to expose the native JDO PersistenceManager to JdoCallback code, or rather a PersistenceManager proxy.

void makePersistent(Object entity)
          Make the given transient instance persistent.

void makePersistentAll(Collection entities)
          Make the given transient instances persistent.

protected Object postProcessResult(Object result, javax.jdo.PersistenceManager pm, boolean existingTransaction)
          Post-process the given result object, which might be a Collection.

void prepareQuery(javax.jdo.Query query)
          Prepare the given JDO query object.

void refresh(Object entity)
          Re-read the state of the given persistent instance.

void refreshAll()
          Re-read the state of all persistent instances.

void refreshAll(Collection entities)
          Re-read the state of all given persistent instances.

void setAllowCreate(boolean allowCreate)
          Set if a new PersistenceManager should be created when no transactional PersistenceManager can be found for the current thread.

void setExposeNativePersistenceManager(boolean exposeNativePersistenceManager)
          Set whether to expose the native JDO PersistenceManager to JdoCallback code.

Methods inherited from class org.springframework.orm.jdo.JdoAccessor

afterPropertiesSet, convertJdoAccessException, flushIfNecessary, getJdoDialect, getPersistenceManagerFactory, isFlushEager, setFlushEager, setJdoDialect, setPersistenceManagerFactory

Methods inherited from class java.lang.Object

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

Fields inherited from class org.springframework.orm.jdo.JdoAccessor
`logger`

Constructor Summary
`JdoTemplate()` Create a new JdoTemplate instance.
`JdoTemplate(javax.jdo.PersistenceManagerFactory pmf)` Create a new JdoTemplate instance.
`JdoTemplate(javax.jdo.PersistenceManagerFactory pmf, boolean allowCreate)` Create a new JdoTemplate instance.

Method Summary
`Object`	`attachCopy(Object detachedEntity)` Reattach the given detached instance (for example, a web form object) with the current JDO transaction, merging its changes into the current persistence instance that represents the corresponding entity.
`Collection`	`attachCopyAll(Collection detachedEntities)` Reattach the given detached instances (for example, web form objects) with the current JDO transaction, merging their changes into the current persistence instances that represent the corresponding entities.
`protected javax.jdo.PersistenceManager`	`createPersistenceManagerProxy(javax.jdo.PersistenceManager pm)` Create a close-suppressing proxy for the given JDO PersistenceManager.
`void`	`deletePersistent(Object entity)` Delete the given persistent instance.
`void`	`deletePersistentAll(Collection entities)` Delete all given persistent instances.
`Object`	`detachCopy(Object entity)` Detach a copy of the given persistent instance from the current JDO transaction, for use outside a JDO transaction (for example, as web form object).
`Collection`	`detachCopyAll(Collection entities)` Detach copies of the given persistent instances from the current JDO transaction, for use outside a JDO transaction (for example, as web form objects).
`void`	`evict(Object entity)` Remove the given object from the PersistenceManager cache.
`void`	`evictAll()` Remove all objects from the PersistenceManager cache.
`void`	`evictAll(Collection entities)` Remove all given objects from the PersistenceManager cache.
`Object`	`execute(JdoCallback action)` Execute the action specified by the given action object within a PersistenceManager.
`Object`	`execute(JdoCallback action, boolean exposeNativePersistenceManager)` Execute the action specified by the given action object within a PersistenceManager.
`Collection`	`executeFind(JdoCallback action)` Execute the specified action assuming that the result object is a Collection.
`Collection`	`find(Class entityClass)` Find all persistent instances of the given class.
`Collection`	`find(Class entityClass, String filter)` Find all persistent instances of the given class that match the given JDOQL filter.
`Collection`	`find(Class entityClass, String filter, String ordering)` Find all persistent instances of the given class that match the given JDOQL filter, with the given result ordering.
`Collection`	`find(Class entityClass, String filter, String parameters, Map values)` Find all persistent instances of the given class that match the given JDOQL filter, using the given parameter declarations and parameter values.
`Collection`	`find(Class entityClass, String filter, String parameters, Map values, String ordering)` Find all persistent instances of the given class that match the given JDOQL filter, using the given parameter declarations and parameter values, with the given result ordering.
`Collection`	`find(Class entityClass, String filter, String parameters, Object[] values)` Find all persistent instances of the given class that match the given JDOQL filter, using the given parameter declarations and parameter values.
`Collection`	`find(Class entityClass, String filter, String parameters, Object[] values, String ordering)` Find all persistent instances of the given class that match the given JDOQL filter, using the given parameter declarations and parameter values, with the given result ordering.
`Collection`	`find(String queryString)` Find persistent instances through the given single-string JDOQL query.
`Collection`	`find(String queryString, Map values)` Find persistent instances through the given single-string JDOQL query.
`Collection`	`find(String language, Object queryObject)` Find persistent instances through the given query object in the specified query language.
`Collection`	`find(String queryString, Object[] values)` Find persistent instances through the given single-string JDOQL query.
`Collection`	`findByNamedQuery(Class entityClass, String queryName)` Find persistent instances through the given named query.
`Collection`	`findByNamedQuery(Class entityClass, String queryName, Map values)` Find persistent instances through the given named query.
`Collection`	`findByNamedQuery(Class entityClass, String queryName, Object[] values)` Find persistent instances through the given named query.
`void`	`flush()` Flush all transactional modifications to the database.
`Object`	`getObjectById(Class entityClass, Object idValue)` Return the persistent instance of the given entity class with the given id value, throwing an exception if not found.
`Object`	`getObjectById(Object objectId)` Return the persistent instance with the given JDO object id, throwing an exception if not found.
`boolean`	`isAllowCreate()` Return if a new PersistenceManager should be created if no thread-bound found.
`boolean`	`isExposeNativePersistenceManager()` Return whether to expose the native JDO PersistenceManager to JdoCallback code, or rather a PersistenceManager proxy.
`void`	`makePersistent(Object entity)` Make the given transient instance persistent.
`void`	`makePersistentAll(Collection entities)` Make the given transient instances persistent.
`protected Object`	`postProcessResult(Object result, javax.jdo.PersistenceManager pm, boolean existingTransaction)` Post-process the given result object, which might be a Collection.
`void`	`prepareQuery(javax.jdo.Query query)` Prepare the given JDO query object.
`void`	`refresh(Object entity)` Re-read the state of the given persistent instance.
`void`	`refreshAll()` Re-read the state of all persistent instances.
`void`	`refreshAll(Collection entities)` Re-read the state of all given persistent instances.
`void`	`setAllowCreate(boolean allowCreate)` Set if a new PersistenceManager should be created when no transactional PersistenceManager can be found for the current thread.
`void`	`setExposeNativePersistenceManager(boolean exposeNativePersistenceManager)` Set whether to expose the native JDO PersistenceManager to JdoCallback code.

Methods inherited from class org.springframework.orm.jdo.JdoAccessor
`afterPropertiesSet, convertJdoAccessException, flushIfNecessary, getJdoDialect, getPersistenceManagerFactory, isFlushEager, setFlushEager, setJdoDialect, setPersistenceManagerFactory`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

JdoTemplate

public JdoTemplate()

Create a new JdoTemplate instance.

JdoTemplate

public JdoTemplate(javax.jdo.PersistenceManagerFactory pmf)

Create a new JdoTemplate instance.

Parameters:: pmf - PersistenceManagerFactory to create PersistenceManagers

JdoTemplate

public JdoTemplate(javax.jdo.PersistenceManagerFactory pmf,
                   boolean allowCreate)

Create a new JdoTemplate instance.

Parameters:: pmf - PersistenceManagerFactory to create PersistenceManagers; allowCreate - if a non-transactional PersistenceManager should be created when no transactional PersistenceManager can be found for the current thread

Method Detail

setAllowCreate

public void setAllowCreate(boolean allowCreate)

Set if a new PersistenceManager should be created when no transactional PersistenceManager can be found for the current thread.

JdoTemplate is aware of a corresponding PersistenceManager bound to the current thread, for example when using JdoTransactionManager. If allowCreate is true, a new non-transactional PersistenceManager will be created if none found, which needs to be closed at the end of the operation. If false, an IllegalStateException will get thrown in this case.

See Also:: PersistenceManagerFactoryUtils.getPersistenceManager(javax.jdo.PersistenceManagerFactory, boolean)

isAllowCreate

public boolean isAllowCreate()

Return if a new PersistenceManager should be created if no thread-bound found.

setExposeNativePersistenceManager

public void setExposeNativePersistenceManager(boolean exposeNativePersistenceManager)

Set whether to expose the native JDO PersistenceManager to JdoCallback code. Default is "false": a PersistenceManager proxy will be returned, suppressing close calls and automatically applying transaction timeouts (if any).

As there is often a need to cast to a provider-specific PersistenceManager class in DAOs that use the JDO 1.0 API, for JDO 2.0 previews and other provider-specific functionality, the exposed proxy implements all interfaces implemented by the original PersistenceManager. If this is not sufficient, turn this flag to "true".

See Also:: JdoCallback, PersistenceManager, prepareQuery(javax.jdo.Query)

isExposeNativePersistenceManager

public boolean isExposeNativePersistenceManager()

Return whether to expose the native JDO PersistenceManager to JdoCallback code, or rather a PersistenceManager proxy.

execute

public Object execute(JdoCallback action)
               throws DataAccessException

Description copied from interface: JdoOperations

Execute the action specified by the given action object within a PersistenceManager. Application exceptions thrown by the action object get propagated to the caller (can only be unchecked). JDO exceptions are transformed into appropriate DAO ones. Allows for returning a result object, i.e. a domain object or a collection of domain objects.

Note: Callback code is not supposed to handle transactions itself! Use an appropriate transaction manager like JdoTransactionManager.

Specified by:: execute in interface JdoOperations

Parameters:: action - callback object that specifies the JDO action
Returns:: a result object returned by the action, or null
Throws:: DataAccessException - in case of JDO errors
See Also:: JdoTransactionManager, org.springframework.dao, org.springframework.transaction, PersistenceManager

executeFind

public Collection executeFind(JdoCallback action)
                       throws DataAccessException

Description copied from interface: JdoOperations

Execute the specified action assuming that the result object is a Collection. This is a convenience method for executing JDO queries within an action.

Specified by:: executeFind in interface JdoOperations

Parameters:: action - callback object that specifies the JDO action
Returns:: a Collection result returned by the action, or null
Throws:: DataAccessException - in case of JDO errors

execute

public Object execute(JdoCallback action,
                      boolean exposeNativePersistenceManager)
               throws DataAccessException

Execute the action specified by the given action object within a PersistenceManager.

Parameters:: action - callback object that specifies the JDO action; exposeNativePersistenceManager - whether to expose the native JDO persistence manager to callback code
Returns:: a result object returned by the action, or null
Throws:: DataAccessException - in case of JDO errors

createPersistenceManagerProxy

protected javax.jdo.PersistenceManager createPersistenceManagerProxy(javax.jdo.PersistenceManager pm)

Create a close-suppressing proxy for the given JDO PersistenceManager. Called by the execute method.

The proxy also prepares returned JDO Query objects.

Parameters:: pm - the JDO PersistenceManager to create a proxy for
Returns:: the PersistenceManager proxy, implementing all interfaces implemented by the passed-in PersistenceManager object (that is, also implementing all provider-specific extension interfaces)
See Also:: PersistenceManager.close(), execute(JdoCallback, boolean), prepareQuery(javax.jdo.Query)

postProcessResult

protected Object postProcessResult(Object result,
                                   javax.jdo.PersistenceManager pm,
                                   boolean existingTransaction)

Post-process the given result object, which might be a Collection. Called by the execute method.

Default implementation always returns the passed-in Object as-is. Subclasses might override this to automatically detach result collections or even single result objects.

Parameters:: pm - the current JDO PersistenceManager; result - the result object (might be a Collection); existingTransaction - if executing within an existing transaction (within an existing JDO PersistenceManager that won't be closed immediately)
Returns:: the post-processed result object (can be simply be the passed-in object)
See Also:: execute(JdoCallback, boolean)

getObjectById

public Object getObjectById(Object objectId)
                     throws DataAccessException

Description copied from interface: JdoOperations

Return the persistent instance with the given JDO object id, throwing an exception if not found.

A JDO object id identifies both the persistent class and the id within the namespace of that class.

Specified by:: getObjectById in interface JdoOperations

Parameters:: objectId - a JDO object id of the persistent instance
Returns:: the persistent instance
Throws:: ObjectRetrievalFailureException - if not found; DataAccessException - in case of JDO errors
See Also:: PersistenceManager.getObjectById(Object, boolean)

getObjectById

public Object getObjectById(Class entityClass,
                            Object idValue)
                     throws DataAccessException

Description copied from interface: JdoOperations

Return the persistent instance of the given entity class with the given id value, throwing an exception if not found.

The given id value is typically just unique within the namespace of the persistent class. Its toString value must correspond to the toString value of the corresponding JDO object id.

Usually, the passed-in value will have originated from the primary key field of a persistent object that uses JDO's application identity.

Specified by:: getObjectById in interface JdoOperations

Parameters:: entityClass - a persistent class; idValue - an id value of the persistent instance
Returns:: the persistent instance
Throws:: ObjectRetrievalFailureException - if not found; DataAccessException - in case of JDO errors
See Also:: PersistenceManager.getObjectById(Object, boolean), PersistenceManager.getObjectById(Class, Object)

evict

public void evict(Object entity)
           throws DataAccessException

Description copied from interface: JdoOperations

Remove the given object from the PersistenceManager cache.

Specified by:: evict in interface JdoOperations

Parameters:: entity - the persistent instance to evict
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.evict(Object)

evictAll

public void evictAll(Collection entities)
              throws DataAccessException

Description copied from interface: JdoOperations

Remove all given objects from the PersistenceManager cache.

Specified by:: evictAll in interface JdoOperations

Parameters:: entities - the persistent instances to evict
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.evictAll(java.util.Collection)

evictAll

public void evictAll()
              throws DataAccessException

Description copied from interface: JdoOperations

Remove all objects from the PersistenceManager cache.

Specified by:: evictAll in interface JdoOperations

Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.evictAll()

refresh

public void refresh(Object entity)
             throws DataAccessException

Description copied from interface: JdoOperations

Re-read the state of the given persistent instance.

Specified by:: refresh in interface JdoOperations

Parameters:: entity - the persistent instance to re-read
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.refresh(Object)

refreshAll

public void refreshAll(Collection entities)
                throws DataAccessException

Description copied from interface: JdoOperations

Re-read the state of all given persistent instances.

Specified by:: refreshAll in interface JdoOperations

Parameters:: entities - the persistent instances to re-read
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.refreshAll(java.util.Collection)

refreshAll

public void refreshAll()
                throws DataAccessException

Description copied from interface: JdoOperations

Re-read the state of all persistent instances.

Specified by:: refreshAll in interface JdoOperations

Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.refreshAll()

makePersistent

public void makePersistent(Object entity)
                    throws DataAccessException

Description copied from interface: JdoOperations

Make the given transient instance persistent.

Specified by:: makePersistent in interface JdoOperations

Parameters:: entity - the transient instance to make persistent
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.makePersistent(Object)

makePersistentAll

public void makePersistentAll(Collection entities)
                       throws DataAccessException

Description copied from interface: JdoOperations

Make the given transient instances persistent.

Specified by:: makePersistentAll in interface JdoOperations

Parameters:: entities - the transient instances to make persistent
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.makePersistentAll(java.util.Collection)

deletePersistent

public void deletePersistent(Object entity)
                      throws DataAccessException

Description copied from interface: JdoOperations

Delete the given persistent instance.

Specified by:: deletePersistent in interface JdoOperations

Parameters:: entity - the persistent instance to delete
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.deletePersistent(Object)

deletePersistentAll

public void deletePersistentAll(Collection entities)
                         throws DataAccessException

Description copied from interface: JdoOperations

Delete all given persistent instances.

This can be combined with any of the find methods to delete by query in two lines of code.

Specified by:: deletePersistentAll in interface JdoOperations

Parameters:: entities - the persistent instances to delete
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.deletePersistentAll(java.util.Collection)

detachCopy

public Object detachCopy(Object entity)

Description copied from interface: JdoOperations

Detach a copy of the given persistent instance from the current JDO transaction, for use outside a JDO transaction (for example, as web form object).

Only available on JDO 2.0+ or through a vendor-specific JdoDialect.

Specified by:: detachCopy in interface JdoOperations

Parameters:: entity - the persistent instance to detach
See Also:: PersistenceManager.detachCopy(Object)

detachCopyAll

public Collection detachCopyAll(Collection entities)

Description copied from interface: JdoOperations

Detach copies of the given persistent instances from the current JDO transaction, for use outside a JDO transaction (for example, as web form objects).

Only available on JDO 2.0+ or through a vendor-specific JdoDialect.

Specified by:: detachCopyAll in interface JdoOperations

Parameters:: entities - the persistent instances to detach
See Also:: PersistenceManager.detachCopyAll(Collection)

attachCopy

public Object attachCopy(Object detachedEntity)

Description copied from interface: JdoOperations

Reattach the given detached instance (for example, a web form object) with the current JDO transaction, merging its changes into the current persistence instance that represents the corresponding entity.

Only available on JDO 2.0+ or through a vendor-specific JdoDialect. Note that as of JDO 2.0 final, this operation is equivalent to a makePersistent call. This dedicated reattach operation now solely serves as distinction point for custom JdoDialects. It is still recommended to call this operation for enhanced adaptability.

Specified by:: attachCopy in interface JdoOperations

Parameters:: detachedEntity - the detached instance to attach
Returns:: the corresponding persistent instance
See Also:: PersistenceManager.makePersistent(Object)

attachCopyAll

public Collection attachCopyAll(Collection detachedEntities)

Description copied from interface: JdoOperations

Reattach the given detached instances (for example, web form objects) with the current JDO transaction, merging their changes into the current persistence instances that represent the corresponding entities.

Only available on JDO 2.0+ or through a vendor-specific JdoDialect. Note that as of JDO 2.0 final, this operation is equivalent to a makePersistentAll call. This dedicated reattach operation now solely serves as distinction point for custom JdoDialects. It is still recommended to call this operation for enhanced adaptability.

Specified by:: attachCopyAll in interface JdoOperations

Parameters:: detachedEntities - the detached instances to reattach
Returns:: the corresponding persistent instances
See Also:: PersistenceManager.makePersistentAll(java.util.Collection)

flush

public void flush()
           throws DataAccessException

Description copied from interface: JdoOperations

Flush all transactional modifications to the database.

Only invoke this for selective eager flushing, for example when JDBC code needs to see certain changes within the same transaction. Else, it's preferable to rely on auto-flushing at transaction completion.

Only available on JDO 2.0+ or through a vendor-specific JdoDialect.

Specified by:: flush in interface JdoOperations

Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.flush(), JdoDialect.flush(javax.jdo.PersistenceManager)

find

public Collection find(Class entityClass)
                throws DataAccessException

Description copied from interface: JdoOperations

Find all persistent instances of the given class.

Specified by:: find in interface JdoOperations

Parameters:: entityClass - a persistent class
Returns:: the persistent instances
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.newQuery(Class)

find

public Collection find(Class entityClass,
                       String filter)
                throws DataAccessException

Description copied from interface: JdoOperations

Find all persistent instances of the given class that match the given JDOQL filter.

Specified by:: find in interface JdoOperations

Parameters:: entityClass - a persistent class; filter - the JDOQL filter to match (or null if none)
Returns:: the persistent instances
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.newQuery(Class, String)

find

public Collection find(Class entityClass,
                       String filter,
                       String ordering)
                throws DataAccessException

Description copied from interface: JdoOperations

Find all persistent instances of the given class that match the given JDOQL filter, with the given result ordering.

Specified by:: find in interface JdoOperations

Parameters:: entityClass - a persistent class; filter - the JDOQL filter to match (or null if none); ordering - the ordering of the result (or null if none)
Returns:: the persistent instances
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.newQuery(Class, String), Query.setOrdering(java.lang.String)

find

public Collection find(Class entityClass,
                       String filter,
                       String parameters,
                       Object[] values)
                throws DataAccessException

Description copied from interface: JdoOperations

Find all persistent instances of the given class that match the given JDOQL filter, using the given parameter declarations and parameter values.

Specified by:: find in interface JdoOperations

Parameters:: entityClass - a persistent class; filter - the JDOQL filter to match; parameters - the JDOQL parameter declarations; values - the corresponding parameter values
Returns:: the persistent instances
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.newQuery(Class, String), Query.declareParameters(java.lang.String), Query.executeWithArray(java.lang.Object[])

find

public Collection find(Class entityClass,
                       String filter,
                       String parameters,
                       Object[] values,
                       String ordering)
                throws DataAccessException

Description copied from interface: JdoOperations

Find all persistent instances of the given class that match the given JDOQL filter, using the given parameter declarations and parameter values, with the given result ordering.

Specified by:: find in interface JdoOperations

Parameters:: entityClass - a persistent class; filter - the JDOQL filter to match; parameters - the JDOQL parameter declarations; values - the corresponding parameter values; ordering - the ordering of the result (or null if none)
Returns:: the persistent instances
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.newQuery(Class, String), Query.declareParameters(java.lang.String), Query.executeWithArray(java.lang.Object[]), Query.setOrdering(java.lang.String)

find

public Collection find(Class entityClass,
                       String filter,
                       String parameters,
                       Map values)
                throws DataAccessException

Description copied from interface: JdoOperations

Find all persistent instances of the given class that match the given JDOQL filter, using the given parameter declarations and parameter values.

Specified by:: find in interface JdoOperations

Parameters:: entityClass - a persistent class; filter - the JDOQL filter to match; parameters - the JDOQL parameter declarations; values - a Map with parameter names as keys and parameter values
Returns:: the persistent instances
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.newQuery(Class, String), Query.declareParameters(java.lang.String), Query.executeWithMap(java.util.Map)

find

public Collection find(Class entityClass,
                       String filter,
                       String parameters,
                       Map values,
                       String ordering)
                throws DataAccessException

Description copied from interface: JdoOperations

Find all persistent instances of the given class that match the given JDOQL filter, using the given parameter declarations and parameter values, with the given result ordering.

Specified by:: find in interface JdoOperations

Parameters:: entityClass - a persistent class; filter - the JDOQL filter to match; parameters - the JDOQL parameter declarations; values - a Map with parameter names as keys and parameter values; ordering - the ordering of the result (or null if none)
Returns:: the persistent instances
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.newQuery(Class, String), Query.declareParameters(java.lang.String), Query.executeWithMap(java.util.Map), Query.setOrdering(java.lang.String)

find

public Collection find(String language,
                       Object queryObject)
                throws DataAccessException

Description copied from interface: JdoOperations

Find persistent instances through the given query object in the specified query language.

Only available on JDO 2.0 and higher.

Specified by:: find in interface JdoOperations

Parameters:: language - the query language (javax.jdo.Query#JDOQL or javax.jdo.Query#SQL, for example); queryObject - the query object for the specified language
Returns:: the persistent instances
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.newQuery(String, Object), Query.JDOQL, Query.SQL

find

public Collection find(String queryString)
                throws DataAccessException

Description copied from interface: JdoOperations

Find persistent instances through the given single-string JDOQL query.

Only available on JDO 2.0 and higher.

Specified by:: find in interface JdoOperations

Parameters:: queryString - the single-string JDOQL query
Returns:: the persistent instances
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.newQuery(String)

find

public Collection find(String queryString,
                       Object[] values)
                throws DataAccessException

Description copied from interface: JdoOperations

Find persistent instances through the given single-string JDOQL query.

Only available on JDO 2.0 and higher.

Specified by:: find in interface JdoOperations

Parameters:: queryString - the single-string JDOQL query; values - the corresponding parameter values
Returns:: the persistent instances
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.newQuery(String)

find

public Collection find(String queryString,
                       Map values)
                throws DataAccessException

Description copied from interface: JdoOperations

Find persistent instances through the given single-string JDOQL query.

Only available on JDO 2.0 and higher.

Specified by:: find in interface JdoOperations

Parameters:: queryString - the single-string JDOQL query; values - a Map with parameter names as keys and parameter values
Returns:: the persistent instances
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.newQuery(String)

findByNamedQuery

public Collection findByNamedQuery(Class entityClass,
                                   String queryName)
                            throws DataAccessException

Description copied from interface: JdoOperations

Find persistent instances through the given named query.

Only available on JDO 2.0+ or through a vendor-specific JdoDialect.

Specified by:: findByNamedQuery in interface JdoOperations

Parameters:: entityClass - a persistent class; queryName - the name of the query
Returns:: the persistent instances
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.newNamedQuery(Class, String)

findByNamedQuery

public Collection findByNamedQuery(Class entityClass,
                                   String queryName,
                                   Object[] values)
                            throws DataAccessException

Description copied from interface: JdoOperations

Find persistent instances through the given named query.

Only available on JDO 2.0+ or through a vendor-specific JdoDialect.

Specified by:: findByNamedQuery in interface JdoOperations

Parameters:: entityClass - a persistent class; queryName - the name of the query; values - the corresponding parameter values
Returns:: the persistent instances
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.newNamedQuery(Class, String)

findByNamedQuery

public Collection findByNamedQuery(Class entityClass,
                                   String queryName,
                                   Map values)
                            throws DataAccessException

Description copied from interface: JdoOperations

Find persistent instances through the given named query.

Only available on JDO 2.0+ or through a vendor-specific JdoDialect.

Specified by:: findByNamedQuery in interface JdoOperations

Parameters:: entityClass - a persistent class; queryName - the name of the query; values - a Map with parameter names as keys and parameter values
Returns:: the persistent instances
Throws:: DataAccessException - in case of JDO errors
See Also:: PersistenceManager.newNamedQuery(Class, String)

prepareQuery

public void prepareQuery(javax.jdo.Query query)
                  throws javax.jdo.JDOException

Prepare the given JDO query object. To be used within a JdoCallback. Applies a transaction timeout, if any. If you don't use such timeouts, the call is a no-op.

In general, prefer a proxied PersistenceManager instead, which will automatically apply the transaction timeout (through the use of a special PersistenceManager proxy). You need to set the "exposeNativePersistenceManager" property to "false" to activate this. Note that you won't be able to cast to a provider-specific JDO PersistenceManager class anymore then.

Parameters:: query - the JDO query object
Throws:: javax.jdo.JDOException - if the query could not be properly prepared
See Also:: JdoCallback.doInJdo(javax.jdo.PersistenceManager), PersistenceManagerFactoryUtils.applyTransactionTimeout(javax.jdo.Query, javax.jdo.PersistenceManagerFactory, org.springframework.orm.jdo.JdoDialect), setExposeNativePersistenceManager(boolean)

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JdoTemplate (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

org.springframework.orm.jdo Class JdoTemplate

JdoTemplate

JdoTemplate

JdoTemplate

setAllowCreate

isAllowCreate

setExposeNativePersistenceManager

isExposeNativePersistenceManager

execute

executeFind

execute

createPersistenceManagerProxy

postProcessResult

getObjectById

getObjectById

evict

evictAll

evictAll

refresh

refreshAll

refreshAll

makePersistent

makePersistentAll

deletePersistent

deletePersistentAll

detachCopy

detachCopyAll

attachCopy

attachCopyAll

flush

find

find

find

find

find

find

find

find

find

find

find

findByNamedQuery

findByNamedQuery

findByNamedQuery

prepareQuery

org.springframework.orm.jdo
Class JdoTemplate