01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17: package org.apache.commons.beanutils.converters;
18:
19: /**
20: * {@link org.apache.commons.beanutils.Converter} implementaion that handles conversion
21: * to and from <b>java.lang.Character</b> objects.
22: * <p>
23: * Can be configured to either return a <i>default value</i> or throw a
24: * <code>ConversionException</code> if a conversion error occurs.
25: *
26: * @author Craig R. McClanahan
27: * @version $Revision: 555845 $ $Date: 2007-07-13 03:52:05 +0100 (Fri, 13 Jul 2007) $
28: * @since 1.3
29: */
30: public final class CharacterConverter extends AbstractConverter {
31:
32: /**
33: * Construct a <b>java.lang.Character</b> <i>Converter</i> that throws
34: * a <code>ConversionException</code> if an error occurs.
35: */
36: public CharacterConverter() {
37: super (Character.class);
38: }
39:
40: /**
41: * Construct a <b>java.lang.Character</b> <i>Converter</i> that returns
42: * a default value if an error occurs.
43: *
44: * @param defaultValue The default value to be returned
45: * if the value to be converted is missing or an error
46: * occurs converting the value.
47: */
48: public CharacterConverter(Object defaultValue) {
49: super (Character.class, defaultValue);
50: }
51:
52: /**
53: * <p>Convert a java.lang.Class or object into a String.</p>
54: *
55: * @param value The input value to be converted
56: * @return the converted String value.
57: */
58: protected String convertToString(Object value) {
59: String strValue = value.toString();
60: return strValue.length() == 0 ? "" : strValue.substring(0, 1);
61: }
62:
63: /**
64: * <p>Convert the input object into a java.lang.Character.</p>
65: *
66: * @param type Data type to which this value should be converted.
67: * @param value The input value to be converted.
68: * @return The converted value.
69: * @throws Exception if conversion cannot be performed successfully
70: */
71: protected Object convertToType(Class type, Object value)
72: throws Exception {
73: return new Character(value.toString().charAt(0));
74: }
75:
76: }
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