/*

  * Licensed to the Apache Software Foundation (ASF) under one or more

  * contributor license agreements.  See the NOTICE file distributed with

  * this work for additional information regarding copyright ownership.

  * The ASF licenses this file to You under the Apache License, Version 2.0

  * (the "License"); you may not use this file except in compliance with

  * the License.  You may obtain a copy of the License at

  *

  *      http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.apache.commons.beanutils.converters;

 import java.util.List;

 import org.apache.commons.beanutils.ConversionException;

 /**

  * <p>Standard {@link org.apache.commons.beanutils.Converter} implementation that converts an incoming

  * String into a primitive array of byte.  On a conversion failure, returns

  * a specified default value or throws a {@link ConversionException} depending

  * on how this instance is constructed.</p>

  *

  * @author Craig R. McClanahan

  * @version $Revision: 556229 $ $Date: 2007-07-14 02:11:19 -0400 (Sat, 14 Jul 2007) $

  * @since 1.4

  * @deprecated Replaced by the new {@link ArrayConverter} implementation

  */

 public final class ByteArrayConverter extends AbstractArrayConverter {

     // ----------------------------------------------------------- Constructors

     /**

      * Create a {@link org.apache.commons.beanutils.Converter} that will

      * throw a {@link ConversionException} if a conversion error occurs.

      */

     public ByteArrayConverter() {

         this.defaultValue = null;

         this.useDefault = false;

     }

     /**

      * Create a {@link org.apache.commons.beanutils.Converter} that will return

      * the specified default value if a conversion error occurs.

      *

      * @param defaultValue The default value to be returned

      */

     public ByteArrayConverter(Object defaultValue) {

         this.defaultValue = defaultValue;

         this.useDefault = true;

     }

     // ------------------------------------------------------- Static Variables

     /**

      * <p>Model object for type comparisons.</p>

      */

     private static final byte[] MODEL = new byte[0];

     // --------------------------------------------------------- Public Methods

     /**

      * Convert the specified input object into an output object of the

      * specified type.

      *

      * @param type Data type to which this value should be converted

      * @param value The input value to be converted

      * @return the converted value

      * @exception ConversionException if conversion cannot be performed

      *  successfully

      */

     public Object convert(Class type, Object value) {

         // Deal with a null value

         if (value == null) {

             if (useDefault) {

                 return (defaultValue);

             } else {

                 throw new ConversionException("No value specified");

             }

         }

         // Deal with the no-conversion-needed case

         if (MODEL.getClass() == value.getClass()) {

             return (value);

         }

         // Deal with input value as a String array

         if (strings.getClass() == value.getClass()) {

             try {

                 String[] values = (String[]) value;

                 byte[] results = new byte[values.length];

                 for (int i = 0; i < values.length; i++) {

                     results[i] = Byte.parseByte(values[i]);

                 }

                 return (results);

             } catch (Exception e) {

                 if (useDefault) {

                     return (defaultValue);

                 } else {

                     throw new ConversionException(value.toString(), e);

                 }

             }

         }

         // Parse the input value as a String into elements

         // and convert to the appropriate type

         try {

             List list = parseElements(value.toString());

             byte[] results = new byte[list.size()];

             for (int i = 0; i < results.length; i++) {

                 results[i] = Byte.parseByte((String) list.get(i));

             }

             return (results);

         } catch (Exception e) {

             if (useDefault) {

                 return (defaultValue);

             } else {

                 throw new ConversionException(value.toString(), e);

             }

         }

     }

 }