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## Package org.apache.cayenne.map

Contains O/R mapping classes that store relational database metadata information and map it to Java classes.

See:
Description

Interface Summary
EntitySorter | Defines API for sorting of Cayenne entities based on their mutual dependencies.
MappingNamespace | Defines API of a container of DbEntities, ObjEntities, Procedures, Queries and other mapping objects.

Class Summary
AshwoodEntitySorter | Implements dependency sorting algorithms for ObjEntities, DbEntities and DataObjects.
Attribute | Defines a property descriptor that is a part of an Entity.
DataMap | Stores a collection of related mapping objects that describe database and object layers of an application.
DbAttribute | A DbAttribute defines a descriptor for a single database table column.
DbEntity | A DbEntity is a mapping descriptor that defines a structure of a database table.
DbJoin | Defines a join between two attributes of a given relationship.
DbKeyGenerator | DbKeyGenerator is an abstraction of a primary key generator It configures the primary key generation per DbEntity in a RDBMS independent manner.
DbRelationship | A DbRelationship is a descriptor of a database inter-table relationship based on one or more primary key/foreign key pairs.
DeleteRule | Defines constants for the possible values of ObjRelationship delete rules.
DerivedDbAttribute | A DerivedDbAttribute is a DbAttribute that resolves to an SQL expression based on a set of other attributes.
DerivedDbEntity | DbEntity subclass that is based on another DbEntity and allows to define complex database expressions like GROUP BY and aggregate functions.
Entity | An Entity is an abstract descriptor for an entity mapping concept.
EntityDescriptor | A ClassDescriptor describing a persistent bean based on ObjEntity.
EntityDescriptorFactory | A caching descriptor factory that creates ClassDescriptors based on Cayenne mapping information.
EntityInheritanceTree | A tree structure representing inheritance hierarchy of an ObjEntity and its subentities.
EntityResolver | Represents a virtual shared namespace for zero or more DataMaps.
MapLoader | Default MapLoader.
MapObject | Deprecated. Since 1.2 this class is unused.
ObjAttribute | An ObjAttribute is a mapping descriptor of a Java class property.
ObjEntity | ObjEntity is a mapping descriptor for a DataObject Java class.
ObjRelationship | Describes navigational association between two Java classes, represented as source and target ObjEntity.
Procedure | A mapping descriptor for a database stored procedure.
ProcedureParameter | A descriptor for the Procedure parameter.
QueryBuilder | A builder that constructs Cayenne queries from abstract configuration information defined in cayenne-data-map*.dtd.
Relationship | Defines a relationship between two entities.

Exception Summary
DataMapException | Deprecated. since 1.2 unused - CayenneRuntimeException is thrown in cases where this checked exception was used.

## Package org.apache.cayenne.map Description

Contains O/R mapping classes that store relational database metadata information and map it to Java classes.

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