code: /* Copyright (c) 2011-2013, Nick Tolomiczenko
   * Copyright (c) 2013-2015, Cornell University
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   *     * Redistributions of source code must retain the above copyright notice,
   *       this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above copyright
   *       notice, this list of conditions and the following disclaimer in the
   *       documentation and/or other materials provided with the distribution.
   *     * Neither the name of HyperDex nor the names of its contributors may be
   *       used to endorse or promote products derived from this software without
   *       specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  package org.hyperdex.client;
  
  import java.util.*;
  import java.io.UnsupportedEncodingException;
  
  public class ByteString
  {
      private byte[] bytes = null;
      private String defaultEncoding = "UTF-8";
  
      public ByteString(byte[] bytes)
      {
          this.bytes = bytes;
      }
  
      public ByteString(String str, String encoding)
          throws UnsupportedEncodingException
      {
          this.bytes = str.getBytes(encoding);
      }
      
      public ByteString(String str)
      {
          try {
              this.bytes = str.getBytes(defaultEncoding);
          } catch(UnsupportedEncodingException e) {
              // This should never happen. 
              throw new RuntimeException(e.getMessage()); 
          }
      }
  
      public static ByteString wrap(byte[] bytes)
      {
          return new ByteString(bytes);
      }
  
      public static ByteString encode(String str, String encoding)
          throws UnsupportedEncodingException
      {
          return new ByteString(str.getBytes(encoding));
      }
  
      public static String decode(ByteString bs, String encoding)
          throws UnsupportedEncodingException
      {
          return decode(bs.getBytes(), encoding);
      }
  
      public static String decode(byte[] bytes, String encoding)
          throws UnsupportedEncodingException
      {
          return new String(bytes, encoding);
      }
  
      public String getDefaultEncoding()
      {
          return defaultEncoding;
      }
  
      public void setDefaultEncoding(String encoding)
      {
          defaultEncoding = encoding;
      }
  
      public String decode(String encoding)
          throws UnsupportedEncodingException
      {
          return new String(bytes, encoding);
      }
  
      public String toString(String encoding)
          throws UnsupportedEncodingException
      {
          // Remove trailing NULL character
          return decode(encoding).replace("\0", "");
      }
  
      public static String toString(byte[] bytes, String encoding)
          throws UnsupportedEncodingException
      {
          return decode(bytes, encoding);
      }
  
      public String toString()
      {
          String ret = "";
  
          try
          {
              ret = toString(defaultEncoding);
          }
          catch(UnsupportedEncodingException e)
          {
          }
  
          return ret;
      }
  
      public byte[] getBytes()
      {
          return bytes;
      }
  
      private static int compare(byte[] b1, byte[] b2)
      {
          int minSize = ( b1.length < b2.length )?b1.length:b2.length;
  
          for (int i=0; i<minSize; i++)
          {
              if ( (b1[i] & 0x000000ff) < (b2[i] & 0x000000ff) )
              {
                  return -1;
              }
              else if ( (b1[i] & 0x000000ff) > (b2[i] & 0x000000ff) )
              {
                  return 1;
              }
          }
  
          if ( b1.length < b2.length )
          {
              return -1;
          }
          else if ( b1.length > b2.length )
          {
              return 1;
          }
          else
          {
              return 0;
          }
      }
  
      public int compareTo(Object o)
      {
          return compare(bytes,((ByteString)o).getBytes());
      }
  
      public boolean equals(Object o)
      {
          if(o instanceof ByteString) {
              return Arrays.equals(bytes, ((ByteString)o).getBytes());
          } else {
              return false;
          }
      }
  
      public int hashCode()
      {
          return Arrays.hashCode(bytes);
      }
  }
  