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 The Apache MINA Project (dev@mina.apache.org)
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 private final Set<Enum> enums;
39
40 public EnumEditor(Class enumType) {
41 if (enumType == null) {
42 throw new NullPointerException("enumType");
43 }
44
45 this.enumType = enumType;
46 this.enums = EnumSet.allOf(enumType);
47 }
48
49 @Override
50 protected String toText(Object value) {
51 return value.toString();
52 }
53
54 @Override
55 protected Object toValue(String text) throws IllegalArgumentException {
56 if (ORDINAL.matcher(text).matches()) {
57 int ordinal = Integer.parseInt(text);
58 for (Enum e: enums) {
59 if (e.ordinal() == ordinal) {
60 return e;
61 }
62 }
63
64 throw new IllegalArgumentException("wrong ordinal: " + ordinal);
65 }
66
67 for (Enum e: enums) {
68 if (text.equalsIgnoreCase(e.toString())) {
69 return e;
70 }
71 }
72
73 return Enum.valueOf(enumType, text);
74 }
75 }