72 lines
2.0 KiB
Plaintext
72 lines
2.0 KiB
Plaintext
= Mapping model
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The mapping model encompasses the complete mapping of objects to/from database. It is the
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model used to drive read and write operations.
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[NOTE]
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----
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As of 6.0, only read operations are implemented to use this mapping model. Future versions will hopefully
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move writing to use this mapping model as well
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----
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[plantuml,MasppingTypeSystem,png]
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.Mapping type model (org.hibernate.metamodel.mapping)
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....
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@startuml
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skinparam handwritten true
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interface MappingType
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interface ManagedMappingType
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interface MappingModelExpressable
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interface ValueMapping
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interface BasicType
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interface ModelPart
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interface ModelPartContainer
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MappingType <|-- BasicType
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MappingType <|-- JdbcMapping
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MappingType <|-- ManagedMappingType
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MappingType <|-- CollectionMappingType
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ManagedMappingType <|-- EmbeddableMappingType
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ManagedMappingType <|-- EntityMappingType
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MappingModelExpressable <|-- ValueMapping
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MappingModelExpressable <|-- ModelPart
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ValueMapping <|-- BasicType
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ModelPart <|-- BasicValuedModelPart
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ModelPart <|-- EmbeddableValuedModelPart
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ModelPart <|-- EntityValuedModelPart
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ModelPart <|-- AttributeMapping
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ModelPart <|-- EntityIdentifierMapping
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ModelPart <|-- EntityVersionMapping
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ModelPart <|-- EntityDiscriminatorMapping
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ModelPart <|-- CollectionPart
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ModelPartContainer <|-- EntityMappingType
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ModelPartContainer <|-- EmbeddableMappingType
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@enduml
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....
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== Relationship with legacy "persister walking" SPI
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`org.hibernate.metamodel.model.mapping` contract corollaries in `org.hibernate.persister.walking`:
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EntityMapping::EntityDefinition
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EmbeddableMapping::CompositionDefinition
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AttributeMapping::AttributeDefinition
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EntityIdentifierMapping::EntityIdentifierDefinition
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== AllowableParameterType
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`BindableType` is a contract that defines types that are valid for parameter binding in terms of an SQM query.
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AT some point this needs to be "resolved" to a ValueMapping/Type/Bindable when generating the SQL AST and executing.
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One option is to have the `BindableType` be resolved first to a `SqmExpressable`
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`SqmExpressableAllowableParameterType#resolveSqmExpressable` |