package org.lcsim.material;
   
   /**
    * An enumeration class providing MaterialState enums.
    * @author jeremym
    * @version $Id: MaterialState.java,v 1.5 2011/03/11 19:22:20 jeremy Exp $
    */
   public class MaterialState
   {
      private String _state;
  
      public final static MaterialState UNKNOWN = new MaterialState("unknown");
      public final static MaterialState GAS = new MaterialState("gas");
      public final static MaterialState LIQUID = new MaterialState("liquid");
      public final static MaterialState SOLID = new MaterialState("solid");
  
      private MaterialState(String state)
      {
          _state = state;
      }
  
      /**
       * String representation of MaterialState.
       * @return String representation of this instance.
       */
      public String toString()
      {
          return _state;
      }
  
      public static MaterialState fromString(String stateStr)
      {
          MaterialState state = MaterialState.UNKNOWN;
          if (stateStr != null)
          {
              if (stateStr.toLowerCase().equals("solid"))
              {
                  state = MaterialState.SOLID;
              }
              else if (stateStr.toLowerCase().equals("gas"))
              {
                  state = MaterialState.GAS;
              }
              else if (stateStr.toLowerCase().equals("liquid"))
              {
                  state = MaterialState.LIQUID;
              }
          }
          return state;
      }
  }