package org.rpi.utils;
   
   import org.apache.log4j.Logger;
   
   import java.net.InetAddress;
   import java.net.NetworkInterface;
   import java.net.SocketException;
   import java.net.UnknownHostException;
   
  /**
   * Created by triplem on 24.02.14.
   */
  public class NetworkUtils {
  
      private static final Logger LOG = Logger.getLogger(NetworkUtils.class);
  
      /**
       * private constructor, this is a utility class
       */
      private NetworkUtils() {
  
      }
  
      /***
       * Get the MAC Address.
       *
       * The previous implementation was kind of "oldschool", see http://www.mkyong.com/java/how-to-get-mac-address-in-java/
       *
       * @return
       */
      public static String getMacAddress() {
          InetAddress ip;
  
          StringBuilder sb = new StringBuilder();
  
          try {
              ip = InetAddress.getLocalHost();
              NetworkInterface network = NetworkInterface.getByInetAddress(ip);
  
              byte[] mac = network.getHardwareAddress();
  
              for (int i = 0; i < mac.length; i++) {
                  sb.append(String.format("%02X%s", mac[i], (i < mac.length - 1) ? "-" : ""));
              }
  
          }
          catch (UnknownHostException uhex) {
              LOG.error(uhex);
          }
          catch (SocketException sex) {
              LOG.error(sex);
          }
  
          return sb.toString();
      }
  
      /***
       * Get the HostName, if any problem attempt to get the MAC Address
       *
       * @return
       */
      public static String getHostName() {
          try {
              InetAddress iAddress = InetAddress.getLocalHost();
              String hostName = iAddress.getHostName();
              // String canonicalHostName = iAddress.getCanonicalHostName();
              return hostName;
          } catch (Exception e) {
              LOG.error("Error Getting HostName: ", e);
          }
  
          return getMacAddress();
      }
  }