Class DefaultReferenceResolver

java.lang.Object

org.springframework.data.mongodb.core.convert.DefaultReferenceResolver

All Implemented Interfaces:

ReferenceResolver

Direct Known Subclasses:

DefaultDbRefResolver

public class DefaultReferenceResolver
extends Object
implements ReferenceResolver

ReferenceResolver implementation that uses a given ReferenceLookupDelegate to load and convert entity associations expressed via a persitent property. Creates proxies for associations that should be lazily loaded.

Since:

3.3

Author:

Christoph Strobl, Mark Paluch, Anton Buzdalkin

Nested Class Summary

Nested classes/interfaces inherited from interface ReferenceResolver

ReferenceResolver.MongoEntityReader, ReferenceResolver.ReferenceCollection

Constructor Summary

Constructors

Constructor	Description
DefaultReferenceResolver(ReferenceLoader referenceLoader, PersistenceExceptionTranslator exceptionTranslator)	Create a new instance of DefaultReferenceResolver.

Method Summary

Modifier and Type	Method	Description
protected ReferenceLoader	getReferenceLoader()	The ReferenceLoader executing the lookup.
protected boolean	isLazyReference(MongoPersistentProperty property)	Check if the association expressed by the given property should be resolved lazily.
@Nullable Object	resolveReference(MongoPersistentProperty property, Object source, ReferenceLookupDelegate referenceLookupDelegate, ReferenceResolver.MongoEntityReader entityReader)	Resolve the association defined via the given property from a given source value.

Methods inherited from class Object

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

Constructor Details

DefaultReferenceResolver

public DefaultReferenceResolver(ReferenceLoader referenceLoader,
 PersistenceExceptionTranslator exceptionTranslator)

Create a new instance of DefaultReferenceResolver.

Parameters:

referenceLoader - must not be null.

exceptionTranslator - must not be null.

Method Details

resolveReference

public @Nullable Object resolveReference(MongoPersistentProperty property,
 Object source,
 ReferenceLookupDelegate referenceLookupDelegate,
 ReferenceResolver.MongoEntityReader entityReader)

Description copied from interface: ReferenceResolver

Resolve the association defined via the given property from a given source value. May return a proxy instance in case of a lazy loading association. The resolved value is assignable to PersistentProperty.getType().

Specified by:

resolveReference in interface ReferenceResolver

Parameters:

property - the association defining property.

source - the association source value.

referenceLookupDelegate - the lookup executing component.

entityReader - conversion function capable of constructing entities from raw source.

Returns:

can be null.

isLazyReference

protected boolean isLazyReference(MongoPersistentProperty property)

Check if the association expressed by the given property should be resolved lazily.

Parameters:

property -

Returns:

return true if the defined association is lazy.

See Also:

• DBRef.lazy()
• DocumentReference.lazy()

getReferenceLoader

protected ReferenceLoader getReferenceLoader()

The ReferenceLoader executing the lookup.

Returns:

never null.