01 /*
02 * SPDX-License-Identifier: Apache-2.0
03 *
04 * Copyright 2008-2017 the original author or authors.
05 *
06 * Licensed under the Apache License, Version 2.0 (the "License");
07 * you may not use this file except in compliance with the License.
08 * You may obtain a copy of the License at
09 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package griffon.core.formatters;
19
20 import javax.annotation.Nonnull;
21 import javax.annotation.Nullable;
22 import java.text.SimpleDateFormat;
23 import java.util.Date;
24
25 import static griffon.util.GriffonNameUtils.isBlank;
26
27 /**
28 * @author Andres Almiray
29 * @since 2.0.0
30 */
31 public class DateFormatter extends AbstractFormatter<Date> {
32 private final SimpleDateFormat dateFormat;
33
34 public DateFormatter() {
35 this(null);
36 }
37
38 public DateFormatter(@Nullable String pattern) {
39 if (isBlank(pattern)) {
40 dateFormat = new SimpleDateFormat();
41 } else {
42 dateFormat = new SimpleDateFormat(pattern);
43 }
44 }
45
46 @Nonnull
47 public String getPattern() {
48 return dateFormat.toPattern();
49 }
50
51 @Nullable
52 @Override
53 public String format(@Nullable Date date) {
54 return date == null ? null : dateFormat.format(date);
55 }
56
57 @Nullable
58 @Override
59 public Date parse(@Nullable String str) throws ParseException {
60 if (isBlank(str)) return null;
61 try {
62 return dateFormat.parse(str);
63 } catch (java.text.ParseException e) {
64 throw new ParseException(e);
65 }
66 }
67 }
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