QueryEngine

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org.objectstyle.cayenne.access
Interface QueryEngine

All Known Implementing Classes:: DataContext, DataDomain, DataNode

public interface QueryEngine

Defines methods used to run Cayenne queries.

For more information see Cayenne User Guide.

Method Summary

DataNode dataNodeForObjEntity(org.objectstyle.cayenne.map.ObjEntity objEntity)
          Returns DataNode that should handle database operations for a specified objEntity.

java.util.Collection getDataMaps()
          Returns an unmodifiable collection of DataMap objects associated with this QueryEngine.

EntityResolver getEntityResolver()
          Returns a resolver for this query engine that is capable of resolving between classes, entity names, and obj/db entities

void performQueries(java.util.List queries, OperationObserver resultConsumer)
          Executes a list of queries.

void performQuery(org.objectstyle.cayenne.query.Query query, OperationObserver resultConsumer)
          Executes a single query.

Method Detail

performQueries

public void performQueries(java.util.List queries,
                           OperationObserver resultConsumer)

Executes a list of queries. Will notify resultConsumer about queries progress and results.

performQuery

public void performQuery(org.objectstyle.cayenne.query.Query query,
                         OperationObserver resultConsumer)

Executes a single query. Will notify resultConsumer about query progress and results.

dataNodeForObjEntity

public DataNode dataNodeForObjEntity(org.objectstyle.cayenne.map.ObjEntity objEntity)

Returns DataNode that should handle database operations for a specified objEntity.

getEntityResolver

public EntityResolver getEntityResolver()

Returns a resolver for this query engine that is capable of resolving between classes, entity names, and obj/db entities

getDataMaps

public java.util.Collection getDataMaps()

Returns an unmodifiable collection of DataMap objects associated with this QueryEngine.