package org.rpi.songcast;
   
   public class SongcastMessage {
   
       public byte[] data = null;
   
       public String convertHexToString(String hex) {
   
           StringBuilder sb = new StringBuilder();
          StringBuilder temp = new StringBuilder();
  
          // 49204c6f7665204a617661 split into two characters 49, 20, 4c...
          for (int i = 0; i < hex.length() - 1; i += 2) {
  
              // grab the hex in pairs
              String output = hex.substring(i, (i + 2));
              // convert hex to decimal
              int decimal = Integer.parseInt(output, 16);
              // convert the decimal to character
              sb.append((char) decimal);
  
              temp.append(decimal);
          }
          System.out.println("Decimal : " + temp.toString());
  
          return sb.toString();
      }
  
      public String DecToHex(int number, int length) {
          StringBuilder sb = new StringBuilder();
          sb.append(Integer.toHexString(number));
          while (sb.length() < length) {
              sb.insert(0, '0'); // pad with leading zero if needed
          }
          String hex = sb.toString();
          return hex;
      }
  
      public byte[] hexStringToByteArray(String s) {
          int len = s.length();
          byte[] data = new byte[len / 2];
          for (int i = 0; i < len; i += 2) {
              data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4) + Character.digit(s.charAt(i + 1), 16));
          }
          return data;
      }
  
      public String stringToHex(String string) {
          StringBuilder buf = new StringBuilder(200);
          for (char ch : string.toCharArray()) {
              //if (buf.length() > 0)
              //buf.append(' ');
              buf.append(String.format("%02x", (int) ch));
          }
          return buf.toString();
      }
  
      /*
       *
       * Get a portion of the bytes in the array.
       */
      public byte[] getBytes(int start, int end)
      {
          int size = (end - start) + 1;
          int count = 0;
          byte[] res = new byte[size];
          for(int i = start;i<=end;i++)
          {
              res[count] = data[i];
              count++;
          }
          return res;
      }
  
      public int byteArrayToInt(byte[] b)
      {
          int value = 0;
          for (int i = 0; i < 4; i++) {
              int shift = (4 - 1 - i) * 8;
              value += (b[i] & 0x000000FF) << shift;
          }
          return value;
      }
  
      public String byteArrayToString(byte[] bytes)
      {
          StringBuilder sb = new StringBuilder();
          for (byte b : bytes) {
              sb.append(String.format("%02X ", b));
          }
          return sb.toString();
      }
  
  }