Examples with Cursor org.eclipse.persistence.queries.Cursor used on opensource projects

Example 1 with Cursor

use of org.eclipse.persistence.queries.Cursor in project querydsl by querydsl.

the class EclipseLinkHandler method iterate.

@SuppressWarnings("unchecked")
@Override
public <T> CloseableIterator<T> iterate(Query query, FactoryExpression<?> projection) {
    Iterator<T> iterator = null;
    Closeable closeable = null;
    if (query instanceof JpaQuery) {
        JpaQuery<T> elQuery = (JpaQuery<T>) query;
        elQuery.setHint(QueryHints.RESULT_SET_TYPE, ResultSetType.ForwardOnly);
        elQuery.setHint(QueryHints.SCROLLABLE_CURSOR, true);
        final Cursor cursor = elQuery.getResultCursor();
        closeable = new Closeable() {

            @Override
            public void close() throws IOException {
                cursor.close();
            }
        };
        iterator = cursor;
    } else {
        iterator = query.getResultList().iterator();
    }
    if (projection != null) {
        return new TransformingIterator<T>(iterator, closeable, projection);
    } else {
        return new IteratorAdapter<T>(iterator, closeable);
    }
}