| /* |
| * Copyright (c) 2011, 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.tools.model.query; |
| |
| import org.eclipse.persistence.jpa.jpql.Assert; |
| import org.eclipse.persistence.jpa.jpql.parser.KeywordExpression; |
| import static org.eclipse.persistence.jpa.jpql.parser.Expression.*; |
| |
| /** |
| * The expression representing some keywords: <code>TRUE</code>, <code>FALSE</code> or <code>NULL</code>. |
| * |
| * @see KeywordExpression |
| * |
| * @version 2.4 |
| * @since 2.4 |
| * @author Pascal Filion |
| */ |
| @SuppressWarnings("nls") |
| public class KeywordExpressionStateObject extends SimpleStateObject { |
| |
| /** |
| * Creates a new <code>KeywordExpressionStateObject</code>. |
| * |
| * @param parent The parent of this state object, which cannot be <code>null</code> |
| * @exception NullPointerException The given parent cannot be <code>null</code> |
| */ |
| public KeywordExpressionStateObject(StateObject parent) { |
| super(parent); |
| } |
| |
| /** |
| * Creates a new <code>KeywordExpressionStateObject</code>. |
| * |
| * @param parent The parent of this state object, which cannot be <code>null</code> |
| * @param text Either {@link org.eclipse.persistence.jpa.jpql.parser.Expression#TRUE TRUE}, |
| * {@link org.eclipse.persistence.jpa.jpql.parser.Expression#FALSE FALSE} or |
| * {@link org.eclipse.persistence.jpa.jpql.parser.Expression#NULL NULL} |
| * @exception NullPointerException The given parent cannot be <code>null</code> |
| */ |
| public KeywordExpressionStateObject(StateObject parent, String text) { |
| super(parent, text); |
| validateIdentifier(text); |
| } |
| |
| @Override |
| public void accept(StateObjectVisitor visitor) { |
| visitor.visit(this); |
| } |
| |
| @Override |
| public KeywordExpression getExpression() { |
| return (KeywordExpression) super.getExpression(); |
| } |
| |
| /** |
| * Keeps a reference of the {@link KeywordExpression parsed object} object, which should only be |
| * done when this object is instantiated during the conversion of a parsed JPQL query into |
| * {@link StateObject StateObjects}. |
| * |
| * @param expression The {@link KeywordExpression parsed object} representing one of the three |
| * possible keyword: <code><b>TRUE</b></code>, <code><b>FALSE</b></code> or <code><b>NULL</b></code> |
| */ |
| public void setExpression(KeywordExpression expression) { |
| super.setExpression(expression); |
| } |
| |
| @Override |
| public void setText(String text) { |
| validateIdentifier(text); |
| super.setText(text); |
| } |
| |
| protected void validateIdentifier(String text) { |
| Assert.isValid(text, "Only TRUE, FALSE, and NULL are valid identifiers.", TRUE, FALSE, NULL); |
| } |
| } |