SqlTransformer (midPoint Aggregate JavaDoc)

Type Parameters:

S - schema type

Q - type of entity path

R - type of the transformed data, a row bean
```
public interface SqlTransformer<S,Q extends FlexibleRelationalPathBase<R>,R>
```
Contract for SQL transformers translating from query beans or tuples to model types. TODO: Competencies of this class are not clear yet; in general it contains the "stuff specific to the related type". It may not only transform, but can also store entities (especially sub-entities of object aggregate) and more which is a bit beyond mere "transformation". Also the implemented methods vary wildly as some are used by very generic mechanisms (query interpreter) while others are called on concrete transformer of known type needed in particular situation.

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static class SqlTransformer.SqlTransformationException

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`S`	`toSchemaObject(com.querydsl.core.Tuple row, Q entityPath, Collection<SelectorOptions<GetOperationOptions>> options)`	Transforms row Tuple containing attributes of `SqlTransformer` to schema type `SqlTransformer`.
`S`	`toSchemaObject(R row)`	Transforms row of `SqlTransformer` type to schema type `SqlTransformer`.
`default S`	`toSchemaObjectSafe(com.querydsl.core.Tuple tuple, Q entityPath, Collection<SelectorOptions<GetOperationOptions>> options)`

- Method Detail
  - toSchemaObject
```
S toSchemaObject(R row)
          throws SchemaException
```
    Transforms row of SqlTransformer type to schema type SqlTransformer. If pre-generated bean is used as row it does not include extension (dynamic) columns, which is OK if extension columns are used only for query and their information is still contained in the object somehow else (e.g. full object LOB).
    Alternative would be dynamically generated list of select expressions and transforming row to M object directly from Tuple.
    
    Throws:
    
    SchemaException
  - toSchemaObject
```
S toSchemaObject(com.querydsl.core.Tuple row,
                 Q entityPath,
                 Collection<SelectorOptions<GetOperationOptions>> options)
          throws SchemaException
```
    Transforms row Tuple containing attributes of SqlTransformer to schema type SqlTransformer. Entity path can be used to access tuple elements. This allows loading also dynamically defined columns (like extensions).
    
    Throws:
    
    SchemaException
  - toSchemaObjectSafe
```
default S toSchemaObjectSafe(com.querydsl.core.Tuple tuple,
                             Q entityPath,
                             Collection<SelectorOptions<GetOperationOptions>> options)
```