Interface IdEntityService<T extends Serializable>

Type Parameters:

T - 实体类型，必须实现Serializable接口

All Superinterfaces:

EntityService<T>, ExtService<T>

All Known Subinterfaces:

IdNameEntityService<T>

public interface IdEntityService<T extends Serializable>
extends EntityService<T>

基于ID实体的服务接口，提供基于主键的基本数据操作功能

Author:

Kerbores(kerbores@gmail.com)

Field Summary

Fields inherited from interface ExtService

EQ, GT, GT_AND_EQ, IN, IS, IS_NOT, LIKE, LT, LT_AND_EQ, NEQ, NOT

Method Summary

Modifier and Type	Method	Description
default int	delete(long id)	根据@Id所在的属性的值删除一个实体对象
default boolean	exists(long id)	是否存在@Id所在属性的值为指定值的记录
default T	fetch(long id)	根据@Id所在的属性的值获取一个实体对象
default int	getMaxId()	根据@Id所在的属性在数据库中的最大值

Methods inherited from interface EntityService

_clearLinks, _delete, _deleteLinks, _deleteWith, _fastInsert, _fetch, _fetchLinks, _fetchLinks, _insert, _insert, _insert, _insertLinks, _insertRelation, _insertWith, _query, _query, _update, _update, _updateIgnoreNull, _updateLinks, _updateWith, clear, clear, count, countByNutz, create, deletex, each, each, exists, fetch, fetchx, func, func, getEntity, getEntityType, getObject, getObject, insert, query, query, queryByNutz, setExpert, update, updateRelation

Methods inherited from interface ExtService

all, avg, avg, clearLinks, createSql, dao, delete, deleteLinks, deleteWith, entity, excute, executCountSql, executDeleteOrUpdateSql, fetch, fetch, fetchAsRecord, fetchByField, getCnd, getDefaultPageSize, insert, insert, insertLinks, insertRelation, insertWith, list, list, list, list, list, listAsBoolean, listAsInteger, listAsLong, listAsMap, listAsRecord, listAsString, makeChain, max, max, min, min, save, save, save, save, searchByKeyAndPage, searchByKeyAndPage, searchByKeyAndPage, searchByKeyAndPage, searchByKeyAndPage, searchByKeyAndPage, searchByKeyAndPage, searchByKeyAndPage, searchByKeyAndPage, searchByPage, searchByPage, searchByPage, searchByPage, searchByPage, searchByPage, searchByPage, sql, sum, sum, update, update, update, update, updateFields, updateIgnoreNull, updateLinks, updateWith

Method Details

fetch

default T fetch(long id)

根据@Id所在的属性的值获取一个实体对象

Parameters:

id - 主键属性的值

Returns:

实体对象,如不存在则返回null

delete

default int delete(long id)

根据@Id所在的属性的值删除一个实体对象

Parameters:

id - 主键属性的值

Returns:

删除的记录数, 通常是0或者1

getMaxId

default int getMaxId()

根据@Id所在的属性在数据库中的最大值

Returns:

最大值,若数据库中没有数据,会抛出空指针异常

exists

default boolean exists(long id)

是否存在@Id所在属性的值为指定值的记录

Parameters:

id - 主键属性的值

Returns:

true,如果存在的话