1 /*
2 * Copyright 2004-2006 the Seasar Foundation and the Others.
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,
13 * either express or implied. See the License for the specific language
14 * governing permissions and limitations under the License.
15 */
16 package org.seasar.tuigwaa.util.functor;
17
18 import java.text.SimpleDateFormat;
19 import java.util.Date;
20
21 import com.isenshi.util.functor.UnaryFunction;
22
23 public class DateFilterFunction implements UnaryFunction {
24
25 private SimpleDateFormat formatter;
26
27 public DateFilterFunction(SimpleDateFormat formatter) {
28 this.formatter = formatter;
29 }
30
31 public Object evaluate(Object obj) {
32 if (obj == null) {
33 return null;
34 }
35 if (!(obj instanceof Date)) {
36 return obj;
37 }
38 return formatter.format((Date) obj);
39 }
40 }