cardpane.java

来自「webwork source」· Java 代码 · 共 77 行

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

import webwork.action.ActionSupport;
import webwork.action.ParameterAware;
import webwork.action.SingleValueMap;

import java.util.Map;

/**
 *	Implement functionality similar to how java.awt.CardLayout works for templating web pages.
 *
 *	@author Rickard 謆erg ([e-mail])
 *	@version $Revision: 1.7 $
 */
public class CardPane
   extends ActionSupport
   implements ParameterAware
{
   // Attributes ----------------------------------------------------
   String defaultName;
   String paneName;
   Map parameters;

   // Static --------------------------------------------------------

   // Public --------------------------------------------------------
   /**
    * Default pane
    */
   public void setDefaultName(String aName)
   {
      defaultName = aName;
   }

   public String getDefaultName()
   {
      return defaultName;
   }

   public void setPaneName(String aName)
   {
      paneName = aName;
   }

   public String getPaneName()
   {
      return paneName;
   }

   // ParameterAware implementation ---------------------------------
   public void setParameters(Map aMap)
   {
      parameters = new SingleValueMap(aMap);
   }

   // Action implementation -----------------------------------------
   /**
    * Get chosen pane, or default if no pane is selected
    */
   public String execute()
      throws Exception
   {
      // Get state of pane by getting parameter with name=pane name
      String name = (String)parameters.get(paneName);

      // Return name of chosen pane prefixed with the name of this pane set
      return paneName+"."+(name==null?defaultName:name);
   }
}