parametersactionfactoryproxy.java

webwork source

/*
 * WebWork, Web Application Framework
 *
 * Distributable under Apache license.
 * See terms of license at opensource.org
 */
package webwork.action.factory;

import webwork.action.*;
import webwork.util.BeanUtil;

import java.util.Map;

/**
 * Sets properties on an action from parameters after locating it through
 * the action factory proxy chain.
 *
 * @author Rickard 謆erg ([e-mail])
 * @version $Revision: 1.10 $
 */
public class ParametersActionFactoryProxy
   extends ActionFactoryProxy
{
   // Attributes ----------------------------------------------------

   // Constructors --------------------------------------------------
   public ParametersActionFactoryProxy(ActionFactory aFactory)
   {
      super(aFactory);
   }

   // ActionFactory implementation -------------------------------
   /**
    * Sets properties on the obtained action from the parameters.
    * If an IllegalArgumentException is thrown, a ResultException
    * will be thrown with "error" as the result. This means that if
    * a view is mapped to "error" then the user will be returned
    * and the field causing the error will be highlighted.
    *
    * @see BeanUtil#setProperties(Map, Object)
    */
   public Action getActionImpl(String aName)
      throws Exception
   {
      // Get action from factory
      Action action = getNextFactory().getActionImpl(aName);
      // Check if the NoParameters interface is implemented. In that
      // case no parameters should be set so we just return the action
      if (action instanceof NoParameters)
         return action;
      // Set parameters
      try {
         BeanUtil.setProperties(ActionContext.getParameters(), action);
      } catch (IllegalArgumentException e) {
         throw new ResultException(Action.ERROR);
      }

      // Return action
      return action;
   }

}