| /* |
| * Copyright (c) 2006, 2021 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0, |
| * or the Eclipse Distribution License v. 1.0 which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause |
| */ |
| |
| // Contributors: |
| // Oracle - initial API and implementation |
| // |
| package org.eclipse.persistence.jpa.jpql.parser; |
| |
| /** |
| * The query BNF for an order by item. |
| * <p> |
| * JPA 1.0: <div><b>BNF:</b> <code>orderby_item ::= state_field_path_expression [ ASC | DESC ]</code></div> |
| * <br> |
| * JPA 2.0 <div><b>BNF:</b> <code>orderby_item ::= state_field_path_expression | result_variable [ ASC | DESC ]</code></div> |
| * |
| * @version 2.5.1 |
| * @since 2.3 |
| * @author Pascal Filion |
| */ |
| @SuppressWarnings("nls") |
| public final class InternalOrderByItemBNF extends JPQLQueryBNF { |
| |
| /** |
| * The unique identifier for this <code>InternalOrderByItemBNF</code>. |
| */ |
| public static final String ID = "internal_orderby_item"; |
| |
| /** |
| * Creates a new <code>InternalOrderByItemBNF</code>. |
| */ |
| public InternalOrderByItemBNF() { |
| super(ID); |
| } |
| |
| @Override |
| protected void initialize() { |
| super.initialize(); |
| setHandleAggregate(true); // For invalid queries |
| setFallbackBNFId(ID); |
| setFallbackExpressionFactoryId(InternalOrderByItemFactory.ID); |
| registerChild(IdentificationVariableBNF.ID); |
| registerChild(StateFieldPathExpressionBNF.ID); |
| } |
| } |