| Interface | Description | 
|---|---|
| ContainerMapping | 
 Interface used by clients to interact
 with the assorted mappings that use  
ContainerPolicy. | 
| EmbeddableMapping | 
 INTERNAL
 Common interface to those mappings that are used to map JPA Embedded objects 
 | 
| RelationalMapping | 
 INTERNAL
 All mappings which can be added to org.eclipse.persistence.mappings.Descriptor must
 implement this interface. 
 | 
| Class | Description | 
|---|---|
| AggregateCollectionMapping | 
 Purpose: The aggregate collection mapping is used to represent the aggregate relationship between a single
 source object and a collection of target objects. 
 | 
| AggregateMapping | 
 Purpose: Two objects can be considered to be related by aggregation if there is a strict
 1:1 relationship between the objects. 
 | 
| AggregateObjectMapping | 
 Purpose:Two objects can be considered to be related by aggregation if there is a strict
 1:1 relationship between the objects. 
 | 
| Association | 
 Purpose: Generic association object. 
 | 
| AttributeAccessor | 
 Purpose: This provides an abstract class for setting and retrieving
 the attribute value for the mapping from an object. 
 | 
| CollectionMapping | 
 Purpose: Abstract class for relationship mappings which store collection of objects 
 | 
| DatabaseMapping | 
 Purpose: Defines how an attribute of an object maps to and from the database
 Responsibilities:
  Define type of relationship (1:1/1:M/M:M/etc.) 
 | 
| DirectCollectionMapping | 
 Purpose: This mapping is used to store a collection of simple types (String, Number, Date, etc.) 
 | 
| DirectMapMapping | 
 Mapping for a collection of key-value pairs. 
 | 
| DirectToFieldMapping | 
 Purpose: Maps an attribute to the corresponding database field type. 
 | 
| ForeignReferenceMapping | 
 Purpose: Abstract class for relationship mappings 
 | 
| ManyToManyMapping | 
 Purpose: Many to many mappings are used to represent the relationships
 between a collection of source objects and a collection of target objects. 
 | 
| ManyToOneMapping | 
 Purpose: Define the relationship to be a ManyToOne. 
 | 
| MultitenantPrimaryKeyMapping | 
 Purpose: Maps a multitenant property to the corresponding database 
 field type. 
 | 
| ObjectReferenceMapping | 
 Purpose: Abstract class for 1:1, variable 1:1 and reference mappings 
 | 
| OneToManyMapping | 
 Purpose: This mapping is used to represent the
 typical RDBMS relationship between a single
 source object and collection of target objects; where,
 on the database, the target objects have references
 (foreign keys) to the source object. 
 | 
| OneToOneMapping | 
 Purpose: One to one mappings are used to represent a pointer references
 between two java objects. 
 | 
| PropertyAssociation | 
 Purpose: Generic association object. 
 | 
| RelationTableMechanism | 
 Purpose: Contains relation table functionality
 that was originally defined in ManyToManyMapping
 and now is shared with OneToOneMapping. 
 | 
| TransformationMapping | 
 Purpose: A transformation mapping is used for a specialized translation between how
 a value is represented in Java and its representation on the databae. 
 | 
| TypedAssociation | 
 Purpose: Generic association object. 
 | 
| UnidirectionalOneToManyMapping | 
 Purpose: UnidirectionalOneToManyMapping doesn't have 1:1 back reference mapping. 
 | 
| VariableOneToOneMapping | 
 Purpose: Variable one to one mappings are used to represent a pointer references
 between a java object and an implementer of an interface. 
 | 
| Enum | Description | 
|---|---|
| DatabaseMapping.WriteType | |
| OneToOneMapping.ShallowMode | 
 Mode for writeFromObjectIntoRowInternal method 
 |