| Interface | Description | 
|---|---|
| RelationQueryGenerator | 
 TODO: cleanup implementations and extract common code
 
 Implementations of this interface provide a method to generate queries on a relation table (a table used
 for mapping relations). 
 | 
| Class | Description | 
|---|---|
| AbstractRelationQueryGenerator | 
 Base class for implementers of  
RelationQueryGenerator contract. | 
| OneAuditEntityQueryGenerator | 
 Selects data from an audit entity. 
 | 
| OneEntityQueryGenerator | 
 Selects data from a relation middle-table only. 
 | 
| QueryConstants | 
 Constants used in JPQL queries. 
 | 
| ThreeEntityQueryGenerator | 
 Selects data from a relation middle-table and a two related versions entity. 
 | 
| TwoEntityOneAuditedQueryGenerator | 
 Selects data from a relation middle-table and a related non-audited entity. 
 | 
| TwoEntityQueryGenerator | 
 Selects data from a relation middle-table and a related versions entity. 
 | 
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