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CrudRepository-API PDF 下载


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时间:2020-05-04 15:29来源:http://www.java1234.com 作者:小锋  侵权举报
CrudRepository-API PDF 下载
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CrudRepository-API   PDF 下载

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/*
 * Copyright 2008-2011 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.data.repository;
 
import java.io.Serializable;
 
/**
 * Interface for generic CRUD operations on a repository for a specific type.
 * 
 * @author Oliver Gierke
 * @author Eberhard Wolff
 */
@NoRepositoryBean
public interface CrudRepository<T, ID extends Serializable> extends Repository<T, ID> {
 
/**
* Saves a given entity. Use the returned instance for further operations as the save operation might have changed the
* entity instance completely.
* @param entity
* @return the saved entity
*/
<S extends T> S save(S entity);
 
/**
* Saves all given entities.
* @param entities
* @return the saved entities
* @throws IllegalArgumentException in case the given entity is {@literal null}.
*/
<S extends T> Iterable<S> save(Iterable<S> entities);
 
/**
* Retrieves an entity by its id.
* @param id must not be {@literal null}.
* @return the entity with the given id or {@literal null} if none found
* @throws IllegalArgumentException if {@code id} is {@literal null}
*/
T findOne(ID id);
 
/**
* Returns whether an entity with the given id exists.
* @param id must not be {@literal null}.
* @return true if an entity with the given id exists, {@literal false} otherwise
* @throws IllegalArgumentException if {@code id} is {@literal null}
*/
boolean exists(ID id);
 
/**
* Returns all instances of the type.
* @return all entities
*/
Iterable<T> findAll();
 
/**
* Returns all instances of the type with the given IDs.
* @param ids
* @return
*/
Iterable<T> findAll(Iterable<ID> ids);
 
/**
* Returns the number of entities available.
* @return the number of entities
*/
long count();
 
/**
* Deletes the entity with the given id.
 

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