| /* |
| * 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 expression represents the database specific data type, which may include size and scale. |
| * |
| * <div><b>BNF:</b> <code>database_type ::= data_type_literal [( [numeric_literal [, numeric_literal]] )]</code></div> |
| * |
| * <div><b>BNF:</b> <code>data_type_literal ::= [CHAR, VARCHAR, NUMERIC, INTEGER, DATE, TIME, TIMESTAMP, etc]</code></div> |
| * <p> |
| * Example: <code>CASE(e.name AS VARCHAR(20))</code> |
| * |
| * @version 2.5 |
| * @since 2.4 |
| * @author Pascal Filion |
| */ |
| public final class DatabaseType extends AbstractDoubleEncapsulatedExpression { |
| |
| /** |
| * Creates a new <code>DatabaseType</code>. |
| * |
| * @param parent The parent of this expression |
| * @param databaseType The database type |
| */ |
| public DatabaseType(AbstractExpression parent, String databaseType) { |
| super(parent, databaseType); |
| } |
| |
| @Override |
| public void accept(ExpressionVisitor visitor) { |
| acceptUnknownVisitor(visitor); |
| } |
| |
| @Override |
| public JPQLQueryBNF getQueryBNF() { |
| return getQueryBNF(DatabaseTypeQueryBNF.ID); |
| } |
| |
| @Override |
| protected boolean isSecondExpressionOptional() { |
| return true; |
| } |
| |
| @Override |
| public String parameterExpressionBNF(int index) { |
| return NumericLiteralBNF.ID; |
| } |
| |
| @Override |
| protected boolean shouldParseRightParenthesis(WordParser wordParser, boolean tolerant) { |
| // If the database type uses parenthesis, then this expression will own the right |
| // parenthesis,otherwise its parent expression should own it |
| return hasLeftParenthesis() || hasFirstExpression() || hasComma() || hasSecondExpression(); |
| } |
| } |