package org.lsst.ccs.command.remote;
   
   import java.io.Serializable;
   import org.lsst.ccs.command.CommandInvocationException;
   
   /**
    * The result of invoking a command on a remote server. May consist of <b>either</b>
    * a result (which must be Serializable) or an exception (which by definition must 
    * be serializable).
   * @author tonyj
   */
  public class CommandResponse implements Serializable {
      private Serializable result;
      private CommandInvocationException exception;
  
      public CommandResponse(Serializable result) {
          this.result = result;
      }
  
      public CommandResponse(CommandInvocationException exception) {
          this.exception = exception;
      }
      
      public Object getResult() throws CommandInvocationException {
          if (exception != null) throw exception;
          return result;
      }
  }