| /* |
| * 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; |
| |
| import java.util.List; |
| import org.eclipse.persistence.jpa.jpql.WordParser; |
| |
| /** |
| * The expression representing some keywords: <code>TRUE</code>, <code>FALSE</code> or <code>NULL</code>. |
| * <p> |
| * EclipseLink 2.5 added two new identifiers: <code><b>MINVALUE</b></code> and <code><b>MAXVALUE</b></code>. |
| * |
| * @version 2.5 |
| * @since 2.3 |
| * @author Pascal Filion |
| */ |
| public final class KeywordExpression extends AbstractExpression { |
| |
| /** |
| * The actual identifier found in the string representation of the JPQL query. |
| */ |
| private String identifier; |
| |
| /** |
| * Creates a new <code>KeywordExpression</code>. |
| * |
| * @param parent The parent of this expression |
| * @param identifier The identifier represented by this expression |
| */ |
| public KeywordExpression(AbstractExpression parent, String identifier) { |
| super(parent, identifier); |
| } |
| |
| @Override |
| public void accept(ExpressionVisitor visitor) { |
| visitor.visit(this); |
| } |
| |
| @Override |
| public void acceptChildren(ExpressionVisitor visitor) { |
| } |
| |
| @Override |
| protected void addOrderedChildrenTo(List<Expression> children) { |
| children.add(buildStringExpression(getText())); |
| } |
| |
| /** |
| * Returns the actual identifier found in the string representation of the JPQL query, which has |
| * the actual case that was used. |
| * |
| * @return The identifier that was actually parsed |
| */ |
| public String getActualIdentifier() { |
| return identifier; |
| } |
| |
| @Override |
| public JPQLQueryBNF getQueryBNF() { |
| return getQueryBNF(BooleanLiteralBNF.ID); |
| } |
| |
| @Override |
| public String getText() { |
| return super.getText(); |
| } |
| |
| @Override |
| protected void parse(WordParser wordParser, boolean tolerant) { |
| identifier = wordParser.moveForward(getText()); |
| } |
| |
| @Override |
| protected void toParsedText(StringBuilder writer, boolean actual) { |
| writer.append(actual ? identifier : getText()); |
| } |
| } |