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## org.apache.cayenne.access
Interface QueryEngine

All Known Implementing Classes:
  DataDomain, DataNode

    public interface QueryEngine

Defines methods used to run Cayenne queries.

Author:
  Andrus Adamchik

Method Summary
`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 queries, OperationObserver resultConsumer)` Executes a list of queries wrapping them in its own transaction.

Method Detail

### performQueries

    void performQueries(Collection queries,
                        OperationObserver resultConsumer)

  Executes a list of queries wrapping them in its own transaction. Results of execution are passed to `OperationObserver`object via its callback methods.

  Since:
    1.1 The signiture 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

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