| /* |
| * Copyright (c) 1998, 2020 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.*; |
| |
| /** |
| * INTERNAL |
| * <p><b>Purpose</b>: Represent a FROM |
| * <p><b>Responsibilities</b>:<ul> |
| * <li> Determines the context for the Parse Tree |
| * <li> Determine the reference class for a query |
| * <li> Handle any FROM ... IN clauses |
| * </ul> |
| * @author Jon Driscoll |
| * @since TopLink 5.0 |
| */ |
| public class FromNode extends MajorNode { |
| |
| private List declarations; |
| |
| public String getFirstVariable() { |
| String variable = null; |
| if ((declarations != null) && (declarations.size() > 0)) { |
| variable = ((IdentificationVariableDeclNode)declarations.get(0)).getCanonicalVariableName(); |
| } |
| return variable; |
| } |
| |
| public List getDeclarations() { |
| return declarations; |
| } |
| |
| public void setDeclarations(List decls) { |
| declarations = decls; |
| } |
| |
| /** |
| * INTERNAL |
| * Check the declaration nodes for a path expression starting with a |
| * unqualified field access and if so, replace it by a qualified field |
| * access. |
| */ |
| @Override |
| public Node qualifyAttributeAccess(ParseTreeContext context) { |
| for (int i = 0; i < declarations.size(); i++) { |
| Node decl = (Node)declarations.get(i); |
| declarations.set(i, decl.qualifyAttributeAccess(context)); |
| } |
| return this; |
| } |
| |
| /** |
| * INTERNAL |
| * Validate the current node. |
| */ |
| @Override |
| public void validate(ParseTreeContext context) { |
| for (Iterator i = declarations.iterator(); i.hasNext();) { |
| Node decl = (Node)i.next(); |
| decl.validate(context); |
| } |
| } |
| } |