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

Example 86 with DatabaseQuery

use of org.eclipse.persistence.queries.DatabaseQuery in project eclipselink by eclipse-ee4j.

the class EJBQueryImpl method getResultCollection.

/**
 * Non-standard method to return results of a ReadQuery that has a
 * containerPolicy that returns objects as a collection rather than a List
 *
 * @return Collection of results
 */
@Override
public Collection getResultCollection() {
    // bug51411440: need to throw IllegalStateException if query
    // executed on closed em
    this.entityManager.verifyOpenWithSetRollbackOnly();
    setAsSQLReadQuery();
    propagateResultProperties();
    // bug:4297903, check container policy class and throw exception if its
    // not the right type
    DatabaseQuery query = getDatabaseQueryInternal();
    try {
        if (query.isReadAllQuery()) {
            Class<?> containerClass = ((ReadAllQuery) getDatabaseQueryInternal()).getContainerPolicy().getContainerClass();
            if (!Helper.classImplementsInterface(containerClass, ClassConstants.Collection_Class)) {
                throw QueryException.invalidContainerClass(containerClass, ClassConstants.Collection_Class);
            }
        } else if (query.isReadObjectQuery()) {
            List<Object> resultList = new ArrayList<>();
            Object result = executeReadQuery();
            if (result != null) {
                resultList.add(executeReadQuery());
            }
            return resultList;
        } else if (!query.isReadQuery()) {
            throw new IllegalStateException(ExceptionLocalization.buildMessage("incorrect_query_for_get_result_collection"));
        }
        return (Collection) executeReadQuery();
    } catch (LockTimeoutException exception) {
        throw exception;
    } catch (PersistenceException exception) {
        setRollbackOnly();
        throw exception;
    } catch (IllegalStateException exception) {
        setRollbackOnly();
        throw exception;
    } catch (RuntimeException exception) {
        setRollbackOnly();
        throw new PersistenceException(exception);
    }
}