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Java > Open Source Codes > org > outerj > daisy > query > model > functions > RelativeDateFunction


1 /*
2  * Copyright 2004 Outerthought bvba and Schaubroeck nv
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package org.outerj.daisy.query.model.functions;
17
18 import org.outerj.daisy.query.model.QValueType;
19
20 import java.util.Calendar JavaDoc;
21
22 public class RelativeDateFunction extends RelativeDateTimeFunction {
23     public static final String JavaDoc NAME = "RelativeDate";
24
25     public String JavaDoc getFunctionName() {
26         return NAME;
27     }
28
29     public QValueType getValueType() {
30         return QValueType.DATE;
31     }
32
33     public QValueType getOutputValueType() {
34         return QValueType.DATE;
35     }
36
37     protected Calendar JavaDoc calcDate(boolean start, int shift, int shiftUnit, int dayInShiftUnit) {
38         Calendar JavaDoc calendar = super.calcDate(start, shift, shiftUnit, dayInShiftUnit);
39
40         // for the Date function the time fields should always be null
41 calendar.set(Calendar.HOUR_OF_DAY, 0);
42         calendar.set(Calendar.MINUTE, 0);
43         calendar.set(Calendar.SECOND, 0);
44
45         return calendar;
46     }
47 }
48
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