content: /*
   * ByteTransform.java May 2007
   *
   * Copyright (C) 2007, Niall Gallagher <niallg@users.sf.net>
   *
   * Licensed 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 com.aliyun.odps.simpleframework.xml.transform;
  
  /**
   * The <code>ByteTransform</code> object is used to transform byte
   * values to and from string representations, which will be inserted
   * in the generated XML document as the value place holder. The
   * value must be readable and writable in the same format. Fields
   * and methods annotated with the XML attribute annotation will use
   * this to persist and retrieve the value to and from the XML source.
   * <pre>
   * 
   *    &#64;Attribute
   *    private Byte octet;
   *    
   * </pre>
   * As well as the XML attribute values using transforms, fields and
   * methods annotated with the XML element annotation will use this.
   * Aside from the obvious difference, the element annotation has an
   * advantage over the attribute annotation in that it can maintain
   * any references using the <code>CycleStrategy</code> object. 
   * 
   * @author Niall Gallagher
   */
  class ByteTransform implements Transform<Byte> {
     
     /**
      * This method is used to convert the string value given to an
      * appropriate representation. This is used when an object is
      * being deserialized from the XML document and the value for
      * the string representation is required.
      * 
      * @param value this is the string representation of the value
      * 
      * @return this returns an appropriate instanced to be used
      */
     public Byte read(String value) {
        return Byte.valueOf(value);
     }
     
     /**
      * This method is used to convert the provided value into an XML
      * usable format. This is used in the serialization process when
      * there is a need to convert a field value in to a string so 
      * that that value can be written as a valid XML entity.
      * 
      * @param value this is the value to be converted to a string
      * 
      * @return this is the string representation of the given value
      */
     public String write(Byte value) {
        return value.toString();
     }
  }