me.gaigeshen.mybatis.helper

Interface Dao<T extends Entity<ID>,ID extends java.io.Serializable>

Type Parameters:

T - The entity type

ID - The identity type of entity

public interface Dao<T extends Entity<ID>,ID extends java.io.Serializable>

Super data access interface, dao interface MUST extends this interface directly

Author:

gaigeshen

Method Summary

Modifier and Type	Method and Description
long	count(Condition<T> condition) Returns records count by conditions
void	delete(Condition<T> condition) Delete by conditions
void	deleteOne(ID id) Delete by entity id
boolean	exists(Condition<T> condition) Check exists by conditions
default boolean	exists(ID id) Check exists of entity id
java.util.List<T>	find(Condition<T> condition) Find by conditions
default java.util.List<T>	findAll() Find all records
T	findFirst(Condition<T> condition) Find first record by conditions
T	findOne(ID id) Find entity by id
default PageData<T>	paging(Condition<T> condition) Returns paged entities by conditions
void	save(java.util.List<T> entities) Save many entities
void	saveOne(T entity) Save one entity
default void	saveOrUpdate(T entity) Save or update entity, if the entity has id value, then update it
default PageData<T>	sliceup(Condition<T> condition) Returns paged entities by conditions
void	update(T entity) Update entity by id
void	updateCondition(T update, T condition) Update entities by condition
void	updateConditionNullable(T update, T condition) Update entities by condition
boolean	updateIncremental(T entity, boolean canNegative) Incremental update by id, can only update number properties
void	updateNullable(T entity) Update entity by id, and null value properties update to null

Method Detail

saveOne

void saveOne(T entity)

Save one entity

Parameters:

entity - Entity

save

void save(java.util.List<T> entities)

Save many entities

Parameters:

entities - The entities

saveOrUpdate

default void saveOrUpdate(T entity)

Save or update entity, if the entity has id value, then update it

Parameters:

entity - Entity

deleteOne

void deleteOne(ID id)

Delete by entity id

Parameters:

id - Entity id

delete

void delete(Condition<T> condition)

Delete by conditions

Parameters:

condition - Conditions

findOne

T findOne(ID id)

Find entity by id

Parameters:

id - The id

Returns:

The entity

findFirst

T findFirst(Condition<T> condition)

Find first record by conditions

Parameters:

condition - The conditions

Returns:

The first record entity

findAll

default java.util.List<T> findAll()

Find all records

Returns:

All records

find

java.util.List<T> find(Condition<T> condition)

Find by conditions

Parameters:

condition - The conditions

Returns:

Entities

count

long count(Condition<T> condition)

Returns records count by conditions

Parameters:

condition - The conditions

Returns:

Records count

sliceup

default PageData<T> sliceup(Condition<T> condition)

Returns paged entities by conditions

Parameters:

condition - The conditions

Returns:

Paged entities

paging

default PageData<T> paging(Condition<T> condition)

Returns paged entities by conditions

Parameters:

condition - The conditions

Returns:

Paged entities

exists

default boolean exists(ID id)

Check exists of entity id

Parameters:

id - The entity id

Returns:

Returns true if this id exists

exists

boolean exists(Condition<T> condition)

Check exists by conditions

Parameters:

condition - The conditions

Returns:

Returns true or false

update

void update(T entity)

Update entity by id

Parameters:

entity - The entity with id value

updateIncremental

boolean updateIncremental(@Param(value="update")
                          T entity,
                          @Param(value="canNegative")
                          boolean canNegative)

Incremental update by id, can only update number properties

Parameters:

entity - The entity with id value

canNegative - true: Can update to negative value

Returns:

Update result

updateCondition

void updateCondition(@Param(value="update")
                     T update,
                     @Param(value="condition")
                     T condition)

Update entities by condition

Parameters:

update - The values to be update

condition - The condition

updateNullable

void updateNullable(T entity)

Update entity by id, and null value properties update to null

Parameters:

entity - The entity with id value

updateConditionNullable

void updateConditionNullable(@Param(value="update")
                             T update,
                             @Param(value="condition")
                             T condition)

Update entities by condition

Parameters:

update - The values to be update, and null value properties update to null, exclude id property

condition - The condition