| /* |
| * Copyright (c) 2012, 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; |
| |
| import org.eclipse.persistence.jpa.jpql.WordParser; |
| |
| /** |
| * This <code>HierarchicalQueryClauseFactory</code> creates a new {@link HierarchicalQueryClause} |
| * when the portion of the query to parse starts with either <code><b>VERSIONS</b></code> or |
| * <code><b>AS OF</b></code>. |
| * |
| * @version 2.5 |
| * @since 2.5 |
| * @author Pascal Filion |
| */ |
| @SuppressWarnings("nls") |
| public final class HierarchicalQueryClauseFactory extends ExpressionFactory { |
| |
| /** |
| * The unique identifier of this BNF rule. |
| */ |
| public static final String ID = "hierarchical_query_clause"; |
| |
| /** |
| * Creates a new <code>HierarchicalQueryClauseFactory</code>. |
| */ |
| public HierarchicalQueryClauseFactory() { |
| super(ID, Expression.START_WITH, Expression.CONNECT_BY); |
| } |
| |
| @Override |
| protected AbstractExpression buildExpression(AbstractExpression parent, |
| WordParser wordParser, |
| String word, |
| JPQLQueryBNF queryBNF, |
| AbstractExpression expression, |
| boolean tolerant) { |
| |
| expression = new HierarchicalQueryClause(parent); |
| expression.parse(wordParser, tolerant); |
| return expression; |
| } |
| } |