org.mongodb.morphia

Interface ObjectFactory

All Known Implementing Classes:

DefaultCreator

public interface ObjectFactory

The ObjectFactory is used by morphia to create instances of classes which can be customized to fit a particular applications needs.

Method Summary

Modifier and Type	Method and Description
<T> T	createInstance(Class<T> clazz) Creates an instance of the given class.
<T> T	createInstance(Class<T> clazz, DBObject dbObj) Creates an instance of the class defined in the Mapper.CLASS_NAME_FIELDNAME field in the dbObject passed in.
Object	createInstance(Mapper mapper, MappedField mf, DBObject dbObj) Creates an instance of the class defined in the Mapper.CLASS_NAME_FIELDNAME field in the dbObject passed in.
List	createList(MappedField mf) Defines how morphia creates a List object.
Map	createMap(MappedField mf) Defines how morphia creates a Map object.
Set	createSet(MappedField mf) Defines how morphia creates a Set object.

Method Detail

createInstance

<T> T createInstance(Class<T> clazz)

Creates an instance of the given class.

Type Parameters:

T - the type of the entity

Parameters:

clazz - type class to instantiate

Returns:

the new instance

createInstance

<T> T createInstance(Class<T> clazz,
                     DBObject dbObj)

Creates an instance of the class defined in the Mapper.CLASS_NAME_FIELDNAME field in the dbObject passed in. If that field is missing, the given Class is used instead.

Type Parameters:

T - the type of the entity

Parameters:

clazz - type class to instantiate

dbObj - the state to populate the new instance with

Returns:

the new instance

createInstance

Object createInstance(Mapper mapper,
                      MappedField mf,
                      DBObject dbObj)

Creates an instance of the class defined in the Mapper.CLASS_NAME_FIELDNAME field in the dbObject passed in. If that field is missing, morphia attempts to the MappedField to determine which concrete class to instantiate.

Parameters:

mapper - the Mapper to use

mf - the MappedField to consult when creating the instance

dbObj - the state to populate the new instance with

Returns:

the new instance

createList

List createList(MappedField mf)

Defines how morphia creates a List object.

Parameters:

mf - the MappedField containing any metadata that might define the type of the List to create

Returns:

the List

createMap

Map createMap(MappedField mf)

Defines how morphia creates a Map object.

Parameters:

mf - the MappedField containing any metadata that might define the type of the Map to create

Returns:

the Map

createSet

Set createSet(MappedField mf)

Defines how morphia creates a Set object.

Parameters:

mf - the MappedField containing any metadata that might define the type of the Set to create

Returns:

the Set