PropertyOverridesDelegator.java

package com.googlecode.tawus.internal;

import org.apache.tapestry5.Block;
import org.apache.tapestry5.PropertyOverrides;
import org.apache.tapestry5.ioc.Messages;

/**
 * Delegates local properties to local
 * {@link org.apache.tapestry5.PropertyOverrides} and other properties to main
 * {@link org.apache.tapestry5.PropertyOverrides}
 */
public class PropertyOverridesDelegator implements PropertyOverrides
{
   private final PropertyOverrides main;
   private final PropertyOverrides local;
   private final String actionProperty;

   /**
    * Constructor
    * 
    * @param main
    *           main {@link org.apache.tapestry5.PropertyOverrides}
    * @param local
    *           local {@link org.apache.tapestry5.PropertyOverrides}
    * @param localProperties
    *           properties to be locally overridden
    */
   public PropertyOverridesDelegator(final PropertyOverrides main,
         final PropertyOverrides local,
         final String actionProperty)
   {
      this.main = main;
      this.local = local;
      this.actionProperty = actionProperty;
   }

   /**
    * {@inheritDoc}
    */
   public Block getOverrideBlock(final String name)
   {
      if(actionProperty.replace(".", "").equalsIgnoreCase(name))
      {
         return local.getOverrideBlock("actionCell");
      }
      else
      {
         return main.getOverrideBlock(name);
      }
   }

   /**
    * {@inheritDoc}
    * 
    * Local Messages are not used
    * 
    * @return main messages
    */
   public Messages getOverrideMessages()
   {
      return main.getOverrideMessages();
   }

}