subsetiteratortag.java

来自「webwork source」· Java 代码 · 共 80 行

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

import webwork.view.taglib.ActionTag;
import webwork.util.SubsetIteratorFilter;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.Tag;

/**
 *	Instantiate a JavaBean.
 *
 * The bean may be an action, in which it is executed before used.
 * It is lazily executed, which means that you can set parameters
 * by using the "param" tag.
 *
 *	@author Rickard 謆erg ([e-mail])
 *	@version $Revision: 1.3 $
 */
public class SubsetIteratorTag
   extends ActionTag
{
   // Attributes ----------------------------------------------------
   String sourceAttr;
   String countAttr;
   String startAttr;

   // Constructor ---------------------------------------------------
   public void setParent(Tag t)
   {
      super.setParent(t);
      setName("'"+SubsetIteratorFilter.class.getName()+"'");
   }

   // Public --------------------------------------------------------
   public void setSource(String aName)
   {
      sourceAttr = aName;
   }

   public void setCount(String aCount)
   {
      countAttr = aCount;
   }

   public void setStart(String aStart)
   {
      startAttr = aStart;
   }

   public int doStartTag() throws JspException
   {
      super.doStartTag();

      // Pop holder temporarily while we resolve names
      Object holder = getStack().popValue();

      if (sourceAttr == null)
         ((SubsetIteratorFilter)bean).setSource(findValue("."));
      else
         ((SubsetIteratorFilter)bean).setSource(findValue(sourceAttr));

      if (countAttr != null)
         ((SubsetIteratorFilter)bean).setCount(Integer.parseInt(findString(countAttr)));

      if (startAttr != null)
         ((SubsetIteratorFilter)bean).setStart(Integer.parseInt(findString(startAttr)));

      // Push holder back on stack
      getStack().pushValue(holder);

      return EVAL_BODY_INCLUDE;
   }
}