| /* |
| * Copyright (c) 1998, 2019 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.history; |
| |
| import org.eclipse.persistence.history.AsOfClause; |
| import org.eclipse.persistence.internal.expressions.ExpressionSQLPrinter; |
| |
| /** |
| * INTERNAL: |
| * <b>Purpose:</b> Represents a query level AS OF TIMESTAMP/SCN Oracle SQL clause. |
| * <p><b>Responsibilities:</b> |
| * <ul> |
| * <li>Will be applied to the entire selection criteria, even if |
| * it is only set on the Query's expression builder.</li> |
| * <li>Prints the AS OF clause before the alias name in the FROM clause.</li> |
| * </ul> |
| * @since OracleAS TopLink 10<i>g</i> (10.0.3) |
| * @author Stephen McRitchie |
| */ |
| public class UniversalAsOfClause extends AsOfClause { |
| public UniversalAsOfClause(AsOfClause value) { |
| super(value); |
| } |
| |
| /** |
| * INTERNAL: |
| * Prints the as of clause for an expression inside of the FROM clause. |
| */ |
| @Override |
| public void printSQL(ExpressionSQLPrinter printer) { |
| ((AsOfClause)super.getValue()).printSQL(printer); |
| } |
| |
| /** |
| * INTERNAL: |
| * Gets the actual as of clause represented by <code>this</code>. |
| */ |
| public AsOfClause getAsOfClause() { |
| return (AsOfClause)super.getValue(); |
| } |
| |
| @Override |
| public Object getValue() { |
| return getAsOfClause().getValue(); |
| } |
| |
| @Override |
| public boolean isUniversal() { |
| return true; |
| } |
| |
| public String printString() { |
| return "Universal" + getAsOfClause().toString(); |
| } |
| } |