1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * 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
18
19 package org.apache.commons.beanutils.converters;
20
21
22 import java.util.List;
23 import org.apache.commons.beanutils.ConversionException;
24
25
26 /**
27 * <p>Standard {@link org.apache.commons.beanutils.Converter} implementation that converts an incoming
28 * String into a primitive array of byte. On a conversion failure, returns
29 * a specified default value or throws a {@link ConversionException} depending
30 * on how this instance is constructed.</p>
31 *
32 * @author Craig R. McClanahan
33 * @version $Revision: 556229 $ $Date: 2007-07-14 02:11:19 -0400 (Sat, 14 Jul 2007) $
34 * @since 1.4
35 * @deprecated Replaced by the new {@link ArrayConverter} implementation
36 */
37
38 public final class ByteArrayConverter extends AbstractArrayConverter {
39
40
41 // ----------------------------------------------------------- Constructors
42
43
44 /**
45 * Create a {@link org.apache.commons.beanutils.Converter} that will
46 * throw a {@link ConversionException} if a conversion error occurs.
47 */
48 public ByteArrayConverter() {
49
50 this.defaultValue = null;
51 this.useDefault = false;
52
53 }
54
55
56 /**
57 * Create a {@link org.apache.commons.beanutils.Converter} that will return
58 * the specified default value if a conversion error occurs.
59 *
60 * @param defaultValue The default value to be returned
61 */
62 public ByteArrayConverter(Object defaultValue) {
63
64 this.defaultValue = defaultValue;
65 this.useDefault = true;
66
67 }
68
69
70 // ------------------------------------------------------- Static Variables
71
72
73 /**
74 * <p>Model object for type comparisons.</p>
75 */
76 private static final byte[] MODEL = new byte[0];
77
78
79 // --------------------------------------------------------- Public Methods
80
81
82 /**
83 * Convert the specified input object into an output object of the
84 * specified type.
85 *
86 * @param type Data type to which this value should be converted
87 * @param value The input value to be converted
88 * @return the converted value
89 * @exception ConversionException if conversion cannot be performed
90 * successfully
91 */
92 public Object convert(Class type, Object value) {
93
94 // Deal with a null value
95 if (value == null) {
96 if (useDefault) {
97 return (defaultValue);
98 } else {
99 throw new ConversionException("No value specified");
100 }
101 }
102
103 // Deal with the no-conversion-needed case
104 if (MODEL.getClass() == value.getClass()) {
105 return (value);
106 }
107
108 // Deal with input value as a String array
109 if (strings.getClass() == value.getClass()) {
110 try {
111 String[] values = (String[]) value;
112 byte[] results = new byte[values.length];
113 for (int i = 0; i < values.length; i++) {
114 results[i] = Byte.parseByte(values[i]);
115 }
116 return (results);
117 } catch (Exception e) {
118 if (useDefault) {
119 return (defaultValue);
120 } else {
121 throw new ConversionException(value.toString(), e);
122 }
123 }
124 }
125
126 // Parse the input value as a String into elements
127 // and convert to the appropriate type
128 try {
129 List list = parseElements(value.toString());
130 byte[] results = new byte[list.size()];
131 for (int i = 0; i < results.length; i++) {
132 results[i] = Byte.parseByte((String) list.get(i));
133 }
134 return (results);
135 } catch (Exception e) {
136 if (useDefault) {
137 return (defaultValue);
138 } else {
139 throw new ConversionException(value.toString(), e);
140 }
141 }
142
143 }
144
145
146 }