package org.trails.io;

 import org.apache.tapestry.record.PropertyChange;

 import org.apache.tapestry.record.PropertyChangeImpl;

 import org.apache.tapestry.services.DataSqueezer;

 import org.apache.tapestry.util.io.SqueezeAdaptor;

 /**

  * Squeezes a {@link PropertyChangeAdaptor}

  */

 public class PropertyChangeAdaptor implements SqueezeAdaptor

 {

         public static final String DELIMITER = "trails:";

         public static final String PREFIX = "X";

         public String getPrefix()

         {

                 return PREFIX;

         }

         public Class getDataClass()

         {

                 return PropertyChange.class;

         }

         public String squeeze(DataSqueezer next, Object o)

         {

                 PropertyChange propertyChange = (PropertyChange) o;

                 return PREFIX + next.squeeze(propertyChange.getComponentPath()) + DELIMITER +

                         next.squeeze(propertyChange.getPropertyName() + DELIMITER + next.squeeze(propertyChange.getNewValue()));

         }

         public Object unsqueeze(DataSqueezer next, String string)

         {

                 String[] squeezeds = string.substring(PREFIX.length()).split(DELIMITER);

                 return new PropertyChangeImpl((String) next.unsqueeze(squeezeds[0]), (String) next.unsqueeze(squeezeds[1]),

                         next.unsqueeze(squeezeds[2]));

         }

 }