org.datanucleus.store.query

Interface QueryResult<E>

Type Parameters:

E - Type of the element of the query result

All Superinterfaces:

Collection<E>, Iterable<E>

All Known Implementing Classes:

AbstractQueryResult, CandidateIdsQueryResult, InMemoryQueryResult

public interface QueryResult<E>
extends Collection<E>

Lazy collection results from a Query. The actual result elements are only loaded when accessed.

The lifecycle of a QueryResult is as follows

• Open, Connected, With Connection - the query has been run and the results returned.
• Open, Disconnected - the query has been run, and the txn committed, and the PM closed so has its results available internally
• Closed, Disconnected - the query has been run, txn committed, query results closed.

Method Summary

Modifier and Type	Method and Description
void	close() Method to close the results, making them unusable thereafter.
void	disconnect() Method to disconnect the results from the ExecutionContext, meaning that thereafter it just behaves like a List.

Methods inherited from interface java.util.Collection

add, addAll, clear, contains, containsAll, equals, hashCode, isEmpty, iterator, parallelStream, remove, removeAll, removeIf, retainAll, size, spliterator, stream, toArray, toArray

Methods inherited from interface java.lang.Iterable

forEach

Method Detail

close

void close()

Method to close the results, making them unusable thereafter.

disconnect

void disconnect()

Method to disconnect the results from the ExecutionContext, meaning that thereafter it just behaves like a List.