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

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org.springframework.orm.jpa
Interface JpaOperations

All Known Implementing Classes:

JpaTemplate

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public interface JpaOperations

Interface that specifies a basic set of JPA operations, implemented by JpaTemplate. Not often used, but a useful option to enhance testability, as it can easily be mocked or stubbed.

Defines JpaTemplate's data access methods that mirror various EntityManager methods. Users are strongly encouraged to read the JPA EntityManager javadocs for details on the semantics of those methods.

Note that lazy loading will just work with an open JPA EntityManager, either within a managed transaction or within OpenEntityManagerInViewFilter/ OpenEntityManagerInViewInterceptor. Furthermore, some operations just make sense within transactions, for example: flush, clear.

Since:

2.0

Author:

Juergen Hoeller

See Also:

JpaTemplate, EntityManager, JpaTransactionManager, JpaDialect, OpenEntityManagerInViewFilter, OpenEntityManagerInViewInterceptor

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Method Summary
boolean	contains(Object entity)
Object	execute(JpaCallback action)
List	executeFind(JpaCallback action)
<T> T	find(Class<T> entityClass, Object id)
List	find(String queryString)
List	find(String queryString, Object... values)
List	findByNamedParams(String queryString, Map<String,? extends Object> params)
List	findByNamedQuery(String queryName)
List	findByNamedQuery(String queryName, Object... values)
List	findByNamedQueryAndNamedParams(String queryName, Map<String,? extends Object> params)
void	flush()
<T> T	getReference(Class<T> entityClass, Object id)
<T> T	merge(T entity)
void	persist(Object entity)
void	refresh(Object entity)
void	remove(Object entity)

 

Method Detail

execute

Object execute(JpaCallback action)
               throws DataAccessException

Throws:

DataAccessException

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executeFind

List executeFind(JpaCallback action)
                 throws DataAccessException

Throws:

DataAccessException

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find

<T> T find(Class<T> entityClass,
           Object id)
       throws DataAccessException

Throws:

DataAccessException

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getReference

<T> T getReference(Class<T> entityClass,
                   Object id)
               throws DataAccessException

Throws:

DataAccessException

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contains

boolean contains(Object entity)
                 throws DataAccessException

Throws:

DataAccessException

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refresh

void refresh(Object entity)
             throws DataAccessException

Throws:

DataAccessException

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persist

void persist(Object entity)
             throws DataAccessException

Throws:

DataAccessException

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merge

<T> T merge(T entity)
        throws DataAccessException

Throws:

DataAccessException

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remove

void remove(Object entity)
            throws DataAccessException

Throws:

DataAccessException

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flush

void flush()
           throws DataAccessException

Throws:

DataAccessException

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find

List find(String queryString)
          throws DataAccessException

Throws:

DataAccessException

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find

List find(String queryString,
          Object... values)
          throws DataAccessException

Throws:

DataAccessException

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findByNamedParams

List findByNamedParams(String queryString,
                       Map<String,? extends Object> params)
                       throws DataAccessException

Throws:

DataAccessException

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findByNamedQuery

List findByNamedQuery(String queryName)
                      throws DataAccessException

Throws:

DataAccessException

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findByNamedQuery

List findByNamedQuery(String queryName,
                      Object... values)
                      throws DataAccessException

Throws:

DataAccessException

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findByNamedQueryAndNamedParams

List findByNamedQueryAndNamedParams(String queryName,
                                    Map<String,? extends Object> params)
                                    throws DataAccessException

Throws:

DataAccessException

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