01 /*
02 * Copyright 2008-2016 the original author or authors.
03 *
04 * Licensed under the Apache License, Version 2.0 (the "License");
05 * you may not use this file except in compliance with the License.
06 * You may obtain a copy of the License at
07 *
08 * http://www.apache.org/licenses/LICENSE-2.0
09 *
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 griffon.core.formatters;
17
18 import javax.annotation.Nullable;
19 import java.text.DecimalFormat;
20 import java.text.NumberFormat;
21
22 import static griffon.util.GriffonNameUtils.isBlank;
23
24 /**
25 * @author Andres Almiray
26 * @since 2.0.0
27 */
28 public class FloatFormatter extends AbstractFormatter<Float> {
29 public static final String PATTERN_CURRENCY = "currency";
30 public static final String PATTERN_PERCENT = "percent";
31
32 private final NumberFormat numberFormat;
33
34 public FloatFormatter() {
35 this(null);
36 }
37
38 public FloatFormatter(@Nullable String pattern) {
39 if (isBlank(pattern)) {
40 numberFormat = new DecimalFormat("#.0");
41 } else if (PATTERN_CURRENCY.equalsIgnoreCase(pattern)) {
42 numberFormat = NumberFormat.getCurrencyInstance();
43 } else if (PATTERN_PERCENT.equalsIgnoreCase(pattern)) {
44 numberFormat = NumberFormat.getPercentInstance();
45 } else {
46 numberFormat = new DecimalFormat(pattern);
47 }
48 }
49
50 @Nullable
51 public String format(@Nullable Float number) {
52 return number == null ? null : numberFormat.format(number);
53 }
54
55 @Nullable
56 @Override
57 public Float parse(@Nullable String str) throws ParseException {
58 if (isBlank(str)) return null;
59 try {
60 return numberFormat.parse(str).floatValue();
61 } catch (java.text.ParseException e) {
62 throw new ParseException(e);
63 }
64 }
65 }
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