| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.openjpa.persistence.query; |
| |
| import java.sql.Time; |
| import java.util.Date; |
| |
| /** |
| * Denotes CURRENT_TIME(), CURRENT_DATE() and CURRENT_TIMESTAMP() expressions. |
| * |
| * @author Pinaki Poddar |
| * |
| */ |
| public class CurrentTimeExpression extends ExpressionImpl { |
| private static enum Now { |
| CURRENT_DATE, |
| CURRENT_TIME, |
| CURRENT_TIMESTAMP |
| } |
| |
| private final Class _type; |
| |
| public CurrentTimeExpression(Class operand) { |
| _type = operand; |
| } |
| |
| @Override |
| public String asExpression(AliasContext ctx) { |
| Now now = (_type == Date.class |
| ? Now.CURRENT_DATE |
| : (_type == Time.class |
| ? Now.CURRENT_TIME : Now.CURRENT_TIMESTAMP)); |
| return now.toString(); |
| } |
| |
| @Override |
| public String asProjection(AliasContext ctx) { |
| throw new UnsupportedOperationException(); |
| } |
| } |