01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one
03: * or more contributor license agreements. See the NOTICE file
04: * distributed with this work for additional information
05: * regarding copyright ownership. The ASF licenses this file
06: * to you under the Apache License, Version 2.0 (the
07: * "License"); you may not use this file except in compliance
08: * with the License. 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,
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.regex.Pattern;
24:
25: /**
26: * A {@link PropertyEditor} which converts a {@link String} into
27: * a {@link Number} and vice versa.
28: *
29: * @author The Apache MINA Project (dev@mina.apache.org)
30: * @version $Revision: 606105 $, $Date: 2007-12-20 22:59:58 -0700 (Thu, 20 Dec 2007) $
31: */
32: public class NumberEditor extends AbstractPropertyEditor {
33: private static final Pattern DECIMAL = Pattern
34: .compile("[-+]?[0-9]*\\.?[0-9]*(?:[Ee][-+]?[0-9]+)?");
35: private static final Pattern HEXADECIMAL = Pattern
36: .compile("0x[0-9a-fA-F]+");
37: private static final Pattern OCTET = Pattern
38: .compile("0[0-9][0-9]*");
39:
40: @Override
41: protected final String toText(Object value) {
42: return value.toString();
43: }
44:
45: @Override
46: protected final Object toValue(String text)
47: throws IllegalArgumentException {
48: if (text.length() == 0) {
49: return defaultValue();
50: }
51:
52: if (HEXADECIMAL.matcher(text).matches()) {
53: return toValue(text.substring(2), 16);
54: }
55:
56: if (OCTET.matcher(text).matches()) {
57: return toValue(text, 8);
58: }
59:
60: if (DECIMAL.matcher(text).matches()) {
61: return toValue(text, 10);
62: }
63:
64: throw new NumberFormatException("Not a number: " + text);
65: }
66:
67: protected Object toValue(String text, int radix) {
68: return Integer.parseInt(text, radix);
69: }
70:
71: @Override
72: protected Object defaultValue() {
73: return Integer.valueOf(0);
74: }
75: }
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