| /* |
| * Copyright (c) 1998, 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 from Oracle TopLink |
| package org.eclipse.persistence.internal.jpa.parsing; |
| |
| import java.util.*; |
| |
| import org.eclipse.persistence.queries.ReadAllQuery; |
| import org.eclipse.persistence.queries.ObjectLevelReadQuery; |
| |
| /** |
| * INTERNAL |
| * <p><b>Purpose</b>: Represent an ORDER BY |
| * <p><b>Responsibilities</b>:<ul> |
| * <li> Generate the correct expression for an ORDER BY |
| * </ul> |
| * @author Jon Driscoll |
| * @since TopLink 5.0 |
| */ |
| public class OrderByNode extends MajorNode { |
| |
| List orderByItems = null; |
| |
| /** |
| * Return a new OrderByNode. |
| */ |
| public OrderByNode() { |
| super(); |
| } |
| |
| /** |
| * INTERNAL |
| * Add the ordering expressions to the passed query |
| */ |
| public void addOrderingToQuery(ObjectLevelReadQuery theQuery, GenerationContext context) { |
| if (theQuery.isReadAllQuery()) { |
| Iterator iter = getOrderByItems().iterator(); |
| while (iter.hasNext()) { |
| Node nextNode = (Node)iter.next(); |
| theQuery.addOrdering(nextNode.generateExpression(context)); |
| } |
| } |
| } |
| |
| /** |
| * INTERNAL |
| * Validate node. |
| */ |
| public void validate(ParseTreeContext context, SelectNode selectNode) { |
| for (Iterator i = orderByItems.iterator(); i.hasNext(); ) { |
| Node item = (Node)i.next(); |
| item.validate(context); |
| } |
| } |
| |
| /** |
| * INTERNAL |
| * Return the order by statements |
| */ |
| public List getOrderByItems() { |
| if (orderByItems == null) { |
| setOrderByItems(new Vector()); |
| } |
| return orderByItems; |
| } |
| |
| /** |
| * INTERNAL |
| * Set the order by statements |
| */ |
| public void setOrderByItems(List newItems) { |
| orderByItems = newItems; |
| } |
| } |