1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 *
19 */
20 package org.apache.mina.integration.beans;
21
22 import java.beans.PropertyEditor;
23 import java.util.EnumSet;
24 import java.util.Set;
25 import java.util.regex.Pattern;
26
27 /**
28 * A {@link PropertyEditor} which converts a {@link String} into
29 * an {@link Enum} and vice versa.
30 *
31 * @author <a href="http://mina.apache.org">Apache MINA Project</a>
32 */
33 @SuppressWarnings("unchecked")
34 public class EnumEditor extends AbstractPropertyEditor {
35 private static final Pattern ORDINAL = Pattern.compile("[0-9]+");
36
37 private final Class enumType;
38
39 private final Set<Enum<?>> enums;
40
41 /**
42 * Creates a new EnumEditor instance
43 *
44 * @param enumType The type of Enum
45 */
46 public EnumEditor(Class enumType) {
47 if (enumType == null) {
48 throw new IllegalArgumentException("enumType");
49 }
50
51 this.enumType = enumType;
52 this.enums = EnumSet.allOf(enumType);
53 }
54
55 /**
56 * {@inheritDoc}
57 */
58 @Override
59 protected String toText(Object value) {
60 return value == null ? "" : value.toString();
61 }
62
63 /**
64 * {@inheritDoc}
65 */
66 @Override
67 protected Object toValue(String text) {
68 if (ORDINAL.matcher(text).matches()) {
69 int ordinal = Integer.parseInt(text);
70
71 for (Enum<?> e : enums) {
72 if (e.ordinal() == ordinal) {
73 return e;
74 }
75 }
76
77 throw new IllegalArgumentException("wrong ordinal: " + ordinal);
78 }
79
80 for (Enum<?> e : enums) {
81 if (text.equalsIgnoreCase(e.toString())) {
82 return e;
83 }
84 }
85
86 return Enum.valueOf(enumType, text);
87 }
88 }