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1 /*
2 * $Id: ByteConverter.java,v 1.19 2007/04/27 22:00:07 ofung Exp $
3 */
4
5 /*
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
7 *
8 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
9 *
10 * The contents of this file are subject to the terms of either the GNU
11 * General Public License Version 2 only ("GPL") or the Common Development
12 * and Distribution License("CDDL") (collectively, the "License"). You
13 * may not use this file except in compliance with the License. You can obtain
14 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
15 * or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
16 * language governing permissions and limitations under the License.
17 *
18 * When distributing the software, include this License Header Notice in each
19 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
20 * Sun designates this particular file as subject to the "Classpath" exception
21 * as provided by Sun in the GPL Version 2 section of the License file that
22 * accompanied this code. If applicable, add the following below the License
23 * Header, with the fields enclosed by brackets [] replaced by your own
24 * identifying information: "Portions Copyrighted [year]
25 * [name of copyright owner]"
26 *
27 * Contributor(s):
28 *
29 * If you wish your version of this file to be governed by only the CDDL or
30 * only the GPL Version 2, indicate your decision by adding "[Contributor]
31 * elects to include this software in this distribution under the [CDDL or GPL
32 * Version 2] license." If you don't indicate a single choice of license, a
33 * recipient has the option to distribute your version of this file under
34 * either the CDDL, the GPL Version 2 or to extend the choice of license to
35 * its licensees as provided above. However, if you add GPL Version 2 code
36 * and therefore, elected the GPL Version 2 license, then the option applies
37 * only if the new code is made subject to such option by the copyright
38 * holder.
39 */
40
41 package javax.faces.convert;
42
43
44 import javax.faces.component.UIComponent;
45 import javax.faces.context.FacesContext;
46
47
48 /**
49 * <p>{@link Converter} implementation for <code>java.lang.Byte</code>
50 * (and byte primitive) values.</p>
51 */
52
53 public class ByteConverter implements Converter {
54
55 // ------------------------------------------------------ Manifest Constants
56
57
58 /**
59 * <p>The standard converter id for this converter.</p>
60 */
61 public static final String CONVERTER_ID = "javax.faces.Byte";
62
63 /**
64 * <p>The message identifier of the {@link javax.faces.application.FacesMessage} to be created if
65 * the conversion to <code>Byte</code> fails. The message format
66 * string for this message may optionally include the following
67 * placeholders:
68 * <ul>
69 * <li><code>{0}</code> replaced by the unconverted value.</li>
70 * <li><code>{1}</code> replaced by an example value.</li>
71 * <li><code>{2}</code> replaced by a <code>String</code> whose value
72 * is the label of the input component that produced this message.</li>
73 * </ul></p>
74 */
75 public static final String BYTE_ID =
76 "javax.faces.converter.ByteConverter.BYTE";
77
78 /**
79 * <p>The message identifier of the {@link javax.faces.application.FacesMessage} to be created if
80 * the conversion of the <code>Byte</code> value to
81 * <code>String</code> fails. The message format string for this message
82 * may optionally include the following placeholders:
83 * <ul>
84 * <li><code>{0}</code> relaced by the unconverted value.</li>
85 * <li><code>{1}</code> replaced by a <code>String</code> whose value
86 * is the label of the input component that produced this message.</li>
87 * </ul></p>
88 */
89 public static final String STRING_ID =
90 "javax.faces.converter.STRING";
91
92 // ------------------------------------------------------- Converter Methods
93
94 /**
95 * @throws ConverterException {@inheritDoc}
96 * @throws NullPointerException {@inheritDoc}
97 */
98 public Object getAsObject(FacesContext context, UIComponent component,
99 String value) {
100
101 if (context == null || component == null) {
102 throw new NullPointerException();
103 }
104
105 // If the specified value is null or zero-length, return null
106 if (value == null) {
107 return (null);
108 }
109 value = value.trim();
110 if (value.length() < 1) {
111 return (null);
112 }
113
114 try {
115 return (Byte.valueOf(value));
116 } catch (NumberFormatException nfe) {
117 throw new ConverterException(
118 MessageFactory.getMessage(context,
119 BYTE_ID,
120 value,
121 "254",
122 MessageFactory.getLabel(context,
123 component)));
124 } catch (Exception e) {
125 throw new ConverterException(e);
126 }
127 }
128
129 /**
130 * @throws ConverterException {@inheritDoc}
131 * @throws NullPointerException {@inheritDoc}
132 */
133 public String getAsString(FacesContext context, UIComponent component,
134 Object value) {
135
136 if (context == null || component == null) {
137 throw new NullPointerException();
138 }
139
140 // If the specified value is null, return a zero-length String
141 if (value == null) {
142 return "";
143 }
144
145 // If the incoming value is still a string, play nice
146 // and return the value unmodified
147 if (value instanceof String) {
148 return (String) value;
149 }
150
151 try {
152 return (Byte.toString(((Byte) value).byteValue()));
153 } catch (Exception e) {
154 throw new ConverterException(
155 MessageFactory.getMessage(context,
156 STRING_ID,
157 value,
158 MessageFactory.getLabel(context,
159 component)),
160 e);
161 }
162 }
163 }