sortiteratortag.java

来自「webwork source」· Java 代码 · 共 67 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 webwork.util.SortIteratorFilter;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.Tag;
import java.util.Comparator;

/**
 *	@author Rickard 謆erg ([e-mail])
 *	@version $Revision: 1.2 $
 */
public class SortIteratorTag
   extends ActionTag
{
   // Attributes ----------------------------------------------------
   String sourceAttr;
   String comparatorAttr;

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

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

   public void setComparator(String aComparator)
   {
      comparatorAttr = aComparator;
   }

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

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

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

      Comparator c = (Comparator)findValue(comparatorAttr);
      ((SortIteratorFilter)bean).setComparator((Comparator)findValue(comparatorAttr));

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

      return EVAL_BODY_INCLUDE;
   }
}