?? NonNullMetadata
- ??????:
Metadata
- ???????:
BeanMetadata
,CollectionMetadata
,ComponentMetadata
,IdRefMetadata
,MapMetadata
,PropsMetadata
,ReferenceListMetadata
,ReferenceMetadata
,RefMetadata
,ServiceMetadata
,ServiceReferenceMetadata
,Target
,ValueMetadata
Metadata for a value that cannot
null
. All Metadata subtypes extend
this type except for NullMetadata
.
This Metadata type is used for keys in Maps because they cannot be
null
.