001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018
019 package org.apache.commons.beanutils.converters;
020
021
022 import java.util.List;
023 import org.apache.commons.beanutils.ConversionException;
024
025
026 /**
027 * <p>Standard {@link org.apache.commons.beanutils.Converter} implementation that converts an incoming
028 * String into a primitive array of byte. On a conversion failure, returns
029 * a specified default value or throws a {@link ConversionException} depending
030 * on how this instance is constructed.</p>
031 *
032 * @author Craig R. McClanahan
033 * @version $Revision: 556229 $ $Date: 2007-07-14 07:11:19 +0100 (Sat, 14 Jul 2007) $
034 * @since 1.4
035 * @deprecated Replaced by the new {@link ArrayConverter} implementation
036 */
037
038 public final class ByteArrayConverter extends AbstractArrayConverter {
039
040
041 // ----------------------------------------------------------- Constructors
042
043
044 /**
045 * Create a {@link org.apache.commons.beanutils.Converter} that will
046 * throw a {@link ConversionException} if a conversion error occurs.
047 */
048 public ByteArrayConverter() {
049
050 this.defaultValue = null;
051 this.useDefault = false;
052
053 }
054
055
056 /**
057 * Create a {@link org.apache.commons.beanutils.Converter} that will return
058 * the specified default value if a conversion error occurs.
059 *
060 * @param defaultValue The default value to be returned
061 */
062 public ByteArrayConverter(Object defaultValue) {
063
064 this.defaultValue = defaultValue;
065 this.useDefault = true;
066
067 }
068
069
070 // ------------------------------------------------------- Static Variables
071
072
073 /**
074 * <p>Model object for type comparisons.</p>
075 */
076 private static final byte[] MODEL = new byte[0];
077
078
079 // --------------------------------------------------------- Public Methods
080
081
082 /**
083 * Convert the specified input object into an output object of the
084 * specified type.
085 *
086 * @param type Data type to which this value should be converted
087 * @param value The input value to be converted
088 * @return the converted value
089 * @exception ConversionException if conversion cannot be performed
090 * successfully
091 */
092 public Object convert(Class type, Object value) {
093
094 // Deal with a null value
095 if (value == null) {
096 if (useDefault) {
097 return (defaultValue);
098 } else {
099 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 }