| Interface | Description | 
|---|---|
| EJBQLCompiledExpression | Represents an EJB QL expression "compiled" in the context of a certain mapping. | 
| EJBQLExpression | An abstract EJBQL expression interface. | 
| EJBQLExpressionVisitor | A visitor interface to inspect the EJBQL expression tree. | 
| EJBQLParser | An abstract definition of EJBQL query parser. | 
| Class | Description | 
|---|---|
| EJBQLBaseVisitor | A noop implementation of the EJBQL visitor that returns same preset boolean value from
 all methods. | 
| EJBQLParserFactory | Creates  EJBQLParserbased on the system settings. | 
| Exception | Description | 
|---|---|
| EJBQLException | An exception thrown on errors during parsing EJBQL statements. | 
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