Package org.springframework.data.mongodb.core.mapping.event

Interface BeforeSaveCallback<T>

All Superinterfaces:

EntityCallback<T>

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface BeforeSaveCallback<T>
extends EntityCallback<T>

Entity callback triggered before save of a document.

Since:

2.2

Author:

Mark Paluch, Michael J. Simons

See Also:

• EntityCallbacks

Method Summary

Modifier and Type	Method	Description
T	onBeforeSave(T entity, org.bson.Document document, String collection)	Entity callback method invoked before a domain object is saved.

Method Details

onBeforeSave

T onBeforeSave(T entity,
 org.bson.Document document,
 String collection)

Entity callback method invoked before a domain object is saved. Can return either the same or a modified instance of the domain object and can modify Document contents. This method is called after converting the entity to a Document so effectively the document is used as outcome of invoking this callback. Changes to the domain object are not taken into account for saving, only changes to the document. Only transient fields of the entity should be changed in this callback. To change persistent the entity before being converted, use the BeforeConvertCallback.

Parameters:

entity - the domain object to save.

document - Document representing the entity.

collection - name of the collection.

Returns:

the domain object to be persisted.