QueryEngine (cayenne-doc: Cayenne Documentation 4.2 API)

All Known Implementing Classes:

DataDomain, DataNode
```
public interface QueryEngine
```
Defines methods used to run Cayenne queries.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`EntityResolver`	`getEntityResolver()`	Returns a resolver for this query engine that is capable of resolving between classes, entity names, and obj/db entities
`void`	`performQueries(Collection<? extends Query> queries, OperationObserver resultConsumer)`	Executes a list of queries wrapping them in its own transaction.

- Method Detail
  - performQueries
```
void performQueries(Collection<? extends Query> queries,
                    OperationObserver resultConsumer)
```
    Executes a list of queries wrapping them in its own transaction. Results of execution are passed to OperationObserverobject via its callback methods.
    
    Since:
    
    1.1 The signature has changed from List to Collection.
  - getEntityResolver
```
EntityResolver getEntityResolver()
```
    Returns a resolver for this query engine that is capable of resolving between classes, entity names, and obj/db entities