iteratorstatus.java

来自「webwork source」· Java 代码 · 共 90 行

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

/**
 * The iterator tag can export an IteratorStatus object so that
 * one can get information about the status of the iteration, such as
 * the size, current index, and whether any more items are available.
 *
 * @author Rickard 謆erg ([e-mail])
 */
public class IteratorStatus
{
   // Attributes ----------------------------------------------------
   protected StatusState state;

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

   // Constructors --------------------------------------------------
   public IteratorStatus(StatusState aState)
   {
      state = aState;
   }

   // Public --------------------------------------------------------
   public boolean isFirst()
   {
      return state.index == 0;
   }

   public boolean isLast()
   {
      return state.last;
   }

   public int getCount()
   {
      return state.index + 1;
   }

   public int getIndex()
   {
      return state.index;
   }

   public boolean isOdd()
   {
      return ((state.index + 1) % 2) == 1;
   }

   public boolean isEven()
   {
      return ((state.index + 1) % 2) == 0;
   }

   public int modulus(int operand)
   {
      return (state.index + 1) % operand;
   }



   // Package protected ---------------------------------------------
   
   // Protected -----------------------------------------------------
   
   // Private -------------------------------------------------------

   // Inner classes -------------------------------------------------
   public static class StatusState
   {
      int index = 0;
      boolean last = false;

      public void setLast(boolean isLast)
      {
         last = isLast;
      }

      public void next()
      {
         index++;
      }
   }
}