?? jpaoperations.java
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/*
* Copyright 2002-2006 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.orm.jpa;
import java.util.List;
import java.util.Map;
import org.springframework.dao.DataAccessException;
/**
* 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.
*
* <p>Provides JpaTemplate's data access methods that mirror various
* EntityManager methods. See the JPA EntityManager javadocs for details
* on those methods.
*
* <p>Note that lazy loading will just work with an open JPA EntityManager,
* either within a Spring-driven transaction (with JpaTransactionManager or
* JtaTransactionManager) or within OpenEntityManagerInViewFilter/Interceptor.
* Furthermore, some operations just make sense within transactions,
* for example: <code>flush</code>.
*
* @author Juergen Hoeller
* @since 2.0
* @see JpaTemplate
* @see javax.persistence.EntityManager
* @see JpaTransactionManager
* @see org.springframework.transaction.jta.JtaTransactionManager
* @see JpaDialect
* @see org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter
* @see org.springframework.orm.jpa.support.OpenEntityManagerInViewInterceptor
*/
public interface JpaOperations {
Object execute(JpaCallback action) throws DataAccessException;
List executeFind(JpaCallback action) throws DataAccessException;
<T> T find(Class<T> entityClass, Object id) throws DataAccessException;
<T> T getReference(Class<T> entityClass, Object id) throws DataAccessException;
boolean contains(Object entity) throws DataAccessException;
void refresh(Object entity) throws DataAccessException;
void persist(Object entity) throws DataAccessException;
<T> T merge(T entity) throws DataAccessException;
void remove(Object entity) throws DataAccessException;
void flush() throws DataAccessException;
List find(String queryString) throws DataAccessException;
List find(String queryString, Object... values) throws DataAccessException;
List findByNamedParams(String queryString, Map<String,? extends Object> params) throws DataAccessException;
List findByNamedQuery(String queryName) throws DataAccessException;
List findByNamedQuery(String queryName, Object... values) throws DataAccessException;
List findByNamedQueryAndNamedParams(String queryName, Map<String,? extends Object> params) throws DataAccessException;
}
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