org.springframework.data.mapping.context

Interface MappingContext<E extends PersistentEntity<?,P>,P extends PersistentProperty<P>>

All Known Implementing Classes:

AbstractMappingContext

public interface MappingContext<E extends PersistentEntity<?,P>,P extends PersistentProperty<P>>

This interface defines the overall context including all known PersistentEntity instances and methods to obtain instances on demand. it is used internally to establish associations between entities and also at runtime to obtain entities by name.

Author:

Oliver Gierke, Jon Brisbin, Graeme Rocher, Mark Paluch, Christoph Strobl

Method Summary

Modifier and Type	Method and Description
<T> PersistentPropertyPaths<T,P>	findPersistentPropertyPaths(Class<T> type, Predicate<? super P> predicate) Returns all PersistentPropertyPaths pointing to properties on the given type that match the given Predicate.
Collection<TypeInformation<?>>	getManagedTypes() Returns the TypeInformations for all PersistentEntitys in the MappingContext.
Collection<E>	getPersistentEntities() Returns all PersistentEntitys held in the context.
E	getPersistentEntity(Class<?> type) Returns a PersistentEntity for the given Class.
E	getPersistentEntity(P persistentProperty) Returns the PersistentEntity mapped by the given PersistentProperty.
E	getPersistentEntity(TypeInformation<?> type) Returns a PersistentEntity for the given TypeInformation.
PersistentPropertyPath<P>	getPersistentPropertyPath(PropertyPath propertyPath) Returns all PersistentPropertys for the given path expression based on the given PropertyPath.
PersistentPropertyPath<P>	getPersistentPropertyPath(String propertyPath, Class<?> type) Returns all PersistentPropertys for the given dot path notation based on the given type.
default E	getRequiredPersistentEntity(Class<?> type) Returns a required PersistentEntity for the given Class.
default E	getRequiredPersistentEntity(P persistentProperty) Returns the PersistentEntity mapped by the given PersistentProperty.
default E	getRequiredPersistentEntity(TypeInformation<?> type) Returns a PersistentEntity for the given TypeInformation.
boolean	hasPersistentEntityFor(Class<?> type) Returns whether the MappingContext currently contains a PersistentEntity for the type.

Method Detail

getPersistentEntities

Collection<E> getPersistentEntities()

Returns all PersistentEntitys held in the context.

Returns:

never null.

getPersistentEntity

@Nullable
E getPersistentEntity(Class<?> type)

Returns a PersistentEntity for the given Class. Will return null for types that are considered simple ones.

Parameters:

type - must not be null.

Returns:

null if no PersistentEntity found for type.

See Also:

SimpleTypeHolder.isSimpleType(Class)

getRequiredPersistentEntity

default E getRequiredPersistentEntity(Class<?> type)
                               throws MappingException

Returns a required PersistentEntity for the given Class. Will throw IllegalArgumentException for types that are considered simple ones.

Parameters:

type - must not be null.

Returns:

never null.

Throws:

MappingException - when no PersistentEntity can be found for given type.

Since:

2.0

See Also:

SimpleTypeHolder.isSimpleType(Class)

hasPersistentEntityFor

boolean hasPersistentEntityFor(Class<?> type)

Returns whether the MappingContext currently contains a PersistentEntity for the type.

Parameters:

type - must not be null.

Returns:

true if PersistentEntity present for given type.

Since:

1.8

getPersistentEntity

@Nullable
E getPersistentEntity(TypeInformation<?> type)

Returns a PersistentEntity for the given TypeInformation. Will return null for types that are considered simple ones.

Parameters:

type - must not be null.

Returns:

null if no PersistentEntity found for TypeInformation.

See Also:

SimpleTypeHolder.isSimpleType(Class)

getRequiredPersistentEntity

default E getRequiredPersistentEntity(TypeInformation<?> type)
                               throws MappingException

Returns a PersistentEntity for the given TypeInformation. Will throw IllegalArgumentException for types that are considered simple ones.

Parameters:

type - must not be null.

Returns:

never null.

Throws:

MappingException - when no PersistentEntity can be found for given TypeInformation.

See Also:

SimpleTypeHolder.isSimpleType(Class)

getPersistentEntity

@Nullable
E getPersistentEntity(P persistentProperty)

Returns the PersistentEntity mapped by the given PersistentProperty.

Parameters:

persistentProperty - must not be null.

Returns:

the PersistentEntity mapped by the given PersistentProperty or null if no PersistentEntity exists for it or the PersistentProperty does not refer to an entity (the type of the property is considered simple see SimpleTypeHolder.isSimpleType(Class)).

getRequiredPersistentEntity

default E getRequiredPersistentEntity(P persistentProperty)
                               throws MappingException

Returns the PersistentEntity mapped by the given PersistentProperty.

Parameters:

persistentProperty - must not be null.

Returns:

the PersistentEntity mapped by the given PersistentProperty or null if no PersistentEntity exists for it or the PersistentProperty does not refer to an entity (the type of the property is considered simple see SimpleTypeHolder.isSimpleType(Class)).

Throws:

MappingException - when no PersistentEntity can be found for given PersistentProperty.

getPersistentPropertyPath

PersistentPropertyPath<P> getPersistentPropertyPath(PropertyPath propertyPath)
                                             throws InvalidPersistentPropertyPath

Returns all PersistentPropertys for the given path expression based on the given PropertyPath.

Parameters:

propertyPath - must not be null.

Returns:

the PersistentPropertyPath representing the given PropertyPath.

Throws:

InvalidPersistentPropertyPath - in case not all of the segments of the given PropertyPath can be resolved.

getPersistentPropertyPath

PersistentPropertyPath<P> getPersistentPropertyPath(String propertyPath,
                                                    Class<?> type)
                                             throws InvalidPersistentPropertyPath

Returns all PersistentPropertys for the given dot path notation based on the given type.

Parameters:

propertyPath - must not be null.

type - must not be null.

Returns:

the PersistentPropertyPath representing the given property path on the given type.

Throws:

InvalidPersistentPropertyPath - in case not all of the segments of the given property path can be resolved.

findPersistentPropertyPaths

<T> PersistentPropertyPaths<T,P> findPersistentPropertyPaths(Class<T> type,
                                                             Predicate<? super P> predicate)

Returns all PersistentPropertyPaths pointing to properties on the given type that match the given Predicate. In case of circular references the detection will stop at the property that references a type that's already included in the path. Note, that is is a potentially expensive operation as results cannot be cached.

Parameters:

type - must not be null.

predicate - must not be null.

Returns:

Since:

2.1

getManagedTypes

Collection<TypeInformation<?>> getManagedTypes()

Returns the TypeInformations for all PersistentEntitys in the MappingContext.

Returns:

all TypeInformations for the PersistentEntitys in the MappingContext.

Since:

1.8