org.springframework.data.jdbc.core

Class DefaultDataAccessStrategy

java.lang.Object

org.springframework.data.jdbc.core.DefaultDataAccessStrategy

All Implemented Interfaces:

DataAccessStrategy

public class DefaultDataAccessStrategy
extends Object
implements DataAccessStrategy

The default DataAccessStrategy is to generate SQL statements based on meta data from the entity.

Author:

Jens Schauder, Mark Paluch

Constructor Summary

Constructors

Constructor and Description
DefaultDataAccessStrategy(SqlGeneratorSource sqlGeneratorSource, RelationalMappingContext context, RelationalConverter converter, NamedParameterJdbcOperations operations) Creates a DefaultDataAccessStrategy which references it self for resolution of recursive data accesses.
DefaultDataAccessStrategy(@NonNull SqlGeneratorSource sqlGeneratorSource, @NonNull RelationalMappingContext context, @NonNull RelationalConverter converter, @NonNull NamedParameterJdbcOperations operations, @NonNull DataAccessStrategy accessStrategy)

Method Summary

Modifier and Type	Method and Description
long	count(Class<?> domainType) Counts the rows in the table representing the given domain type.
void	delete(Object id, Class<?> domainType) deletes a single row identified by the id, from the table identified by the domainType.
void	delete(Object rootId, PersistentPropertyPath<RelationalPersistentProperty> propertyPath) Deletes all entities reachable via propertyPath from the instance identified by rootId.
<T> void	deleteAll(Class<T> domainType) Deletes all entities of the given domain type.
void	deleteAll(PersistentPropertyPath<RelationalPersistentProperty> propertyPath) Deletes all entities reachable via propertyPath from any instance.
<T> boolean	existsById(Object id, Class<T> domainType) returns if a row with the given id exists for the given type.
<T> Iterable<T>	findAll(Class<T> domainType) Loads all entities of the given type.
<T> Iterable<T>	findAllById(Iterable<?> ids, Class<T> domainType) Loads all entities that match one of the ids passed as an argument.
<T> Iterable<T>	findAllByProperty(Object rootId, RelationalPersistentProperty property) Finds all entities reachable via property from the instance identified by rootId.
<T> T	findById(Object id, Class<T> domainType) Loads a single entity identified by type and id.
<T> Object	insert(T instance, Class<T> domainType, Map<String,Object> additionalParameters) Inserts a the data of a single entity.
<S> boolean	update(S instance, Class<S> domainType) Updates the data of a single entity in the database.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DefaultDataAccessStrategy

public DefaultDataAccessStrategy(SqlGeneratorSource sqlGeneratorSource,
                                 RelationalMappingContext context,
                                 RelationalConverter converter,
                                 NamedParameterJdbcOperations operations)

Creates a DefaultDataAccessStrategy which references it self for resolution of recursive data accesses. Only suitable if this is the only access strategy in use.

DefaultDataAccessStrategy

public DefaultDataAccessStrategy(@NonNull
                                 @NonNull SqlGeneratorSource sqlGeneratorSource,
                                 @NonNull
                                 @NonNull RelationalMappingContext context,
                                 @NonNull
                                 @NonNull RelationalConverter converter,
                                 @NonNull
                                 @NonNull NamedParameterJdbcOperations operations,
                                 @NonNull
                                 @NonNull DataAccessStrategy accessStrategy)

Method Detail

insert

public <T> Object insert(T instance,
                         Class<T> domainType,
                         Map<String,Object> additionalParameters)

Description copied from interface: DataAccessStrategy

Inserts a the data of a single entity. Referenced entities don't get handled.

Specified by:

insert in interface DataAccessStrategy

Type Parameters:

T - the type of the instance.

Parameters:

instance - the instance to be stored. Must not be null.

domainType - the type of the instance. Must not be null.

additionalParameters - name-value pairs of additional parameters. Especially ids of parent entities that need to get referenced are contained in this map. Must not be null.

Returns:

the id generated by the database if any.

update

public <S> boolean update(S instance,
                          Class<S> domainType)

Description copied from interface: DataAccessStrategy

Updates the data of a single entity in the database. Referenced entities don't get handled.

Specified by:

update in interface DataAccessStrategy

Type Parameters:

S - the type of the instance to save.

Parameters:

instance - the instance to save. Must not be null.

domainType - the type of the instance to save. Must not be null.

Returns:

whether the update actually updated a row.

delete

public void delete(Object id,
                   Class<?> domainType)

Description copied from interface: DataAccessStrategy

deletes a single row identified by the id, from the table identified by the domainType. Does not handle cascading deletes.

Specified by:

delete in interface DataAccessStrategy

Parameters:

id - the id of the row to be deleted. Must not be null.

domainType - the type of entity to be deleted. Implicitly determines the table to operate on. Must not be null.

delete

public void delete(Object rootId,
                   PersistentPropertyPath<RelationalPersistentProperty> propertyPath)

Description copied from interface: DataAccessStrategy

Deletes all entities reachable via propertyPath from the instance identified by rootId.

Specified by:

delete in interface DataAccessStrategy

Parameters:

rootId - Id of the root object on which the propertyPath is based. Must not be null.

propertyPath - Leading from the root object to the entities to be deleted. Must not be null.

deleteAll

public <T> void deleteAll(Class<T> domainType)

Description copied from interface: DataAccessStrategy

Deletes all entities of the given domain type.

Specified by:

deleteAll in interface DataAccessStrategy

Type Parameters:

T - type of the domain type.

Parameters:

domainType - the domain type for which to delete all entries. Must not be null.

deleteAll

public void deleteAll(PersistentPropertyPath<RelationalPersistentProperty> propertyPath)

Description copied from interface: DataAccessStrategy

Deletes all entities reachable via propertyPath from any instance.

Specified by:

deleteAll in interface DataAccessStrategy

Parameters:

propertyPath - Leading from the root object to the entities to be deleted. Must not be null.

count

public long count(Class<?> domainType)

Description copied from interface: DataAccessStrategy

Counts the rows in the table representing the given domain type.

Specified by:

count in interface DataAccessStrategy

Parameters:

domainType - the domain type for which to count the elements. Must not be null.

Returns:

the count. Guaranteed to be not null.

findById

public <T> T findById(Object id,
                      Class<T> domainType)

Description copied from interface: DataAccessStrategy

Loads a single entity identified by type and id.

Specified by:

findById in interface DataAccessStrategy

Type Parameters:

T - the type of the entity.

Parameters:

id - the id of the entity to load. Must not be null.

domainType - the domain type of the entity. Must not be null.

Returns:

Might return null.

findAll

public <T> Iterable<T> findAll(Class<T> domainType)

Description copied from interface: DataAccessStrategy

Loads all entities of the given type.

Specified by:

findAll in interface DataAccessStrategy

Type Parameters:

T - the type of entities to load.

Parameters:

domainType - the type of entities to load. Must not be null.

Returns:

Guaranteed to be not null.

findAllById

public <T> Iterable<T> findAllById(Iterable<?> ids,
                                   Class<T> domainType)

Description copied from interface: DataAccessStrategy

Loads all entities that match one of the ids passed as an argument. It is not guaranteed that the number of ids passed in matches the number of entities returned.

Specified by:

findAllById in interface DataAccessStrategy

Type Parameters:

T - type of entities to load.

Parameters:

ids - the Ids of the entities to load. Must not be null.

domainType - the type of entities to laod. Must not be null.

Returns:

the loaded entities. Guaranteed to be not null.

findAllByProperty

public <T> Iterable<T> findAllByProperty(Object rootId,
                                         RelationalPersistentProperty property)

Description copied from interface: DataAccessStrategy

Finds all entities reachable via property from the instance identified by rootId.

Specified by:

findAllByProperty in interface DataAccessStrategy

Parameters:

rootId - Id of the root object on which the propertyPath is based.

property - Leading from the root object to the entities to be found.

existsById

public <T> boolean existsById(Object id,
                              Class<T> domainType)

Description copied from interface: DataAccessStrategy

returns if a row with the given id exists for the given type.

Specified by:

existsById in interface DataAccessStrategy

Type Parameters:

T - the type of the entity.

Parameters:

id - the id of the entity for which to check. Must not be null.

domainType - the type of the entity to check for. Must not be null.

Returns:

true if a matching row exists, otherwise false.