package org.bitrepository.commandline.eventhandler;
   
   import org.bitrepository.client.eventhandler.OperationEvent;
   import org.bitrepository.commandline.output.OutputHandler;
   import org.bitrepository.common.settings.Settings;
   import org.bitrepository.common.utils.Base16Utils;
   import org.bitrepository.modify.replacefile.conversation.ReplaceFileCompletePillarEvent;
   
   /**
   * Complete event awaiter for Getfile.
   * Prints out checksum results, if any.
   */
  public class ReplaceFileEventHandler extends CompleteEventAwaiter {
  
      /**
       * Constructor.
       * @param settings The settings.
       * @param outputHandler The output handler.
       */
      public ReplaceFileEventHandler(Settings settings, OutputHandler outputHandler) {
          super(settings, outputHandler);
      }
  
      @Override
      public void handleComponentComplete(OperationEvent event) {
          if(!(event instanceof ReplaceFileCompletePillarEvent)) {
              output.warn("ReplaceFileEventHandler received a component complete, which is not a "
                      + ReplaceFileCompletePillarEvent.class.getName());
          }
          
          ReplaceFileCompletePillarEvent pillarEvent = (ReplaceFileCompletePillarEvent) event;
          StringBuilder componentText = new StringBuilder();
          if(pillarEvent.getChecksumForReplacedFile() != null) {
              componentText.append("Checksum for replaced file: " 
                      + Base16Utils.decodeBase16(pillarEvent.getChecksumForReplacedFile().getChecksumValue()) + "\t");
          }
          
          if(pillarEvent.getChecksumForNewFile() != null) {
              componentText.append("Checksum for new file: " 
                      + Base16Utils.decodeBase16(pillarEvent.getChecksumForNewFile().getChecksumValue()) + "\t");
          }
          
          if(componentText.length() != 0) {
              output.resultLine(pillarEvent.getContributorID() + " : \t" + componentText.toString());
          }
      }
  }