/*
* Copyright (c) 1998-2010 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.jsp;
import javax.servlet.jsp.jstl.core.LoopTag;
import javax.servlet.jsp.jstl.core.LoopTagStatus;
import javax.servlet.jsp.tagext.JspTag;
import javax.servlet.jsp.tagext.SimpleTag;
import javax.servlet.jsp.tagext.Tag;
import javax.servlet.jsp.tagext.TagAdapter;
import javax.servlet.jsp.tagext.TagSupport;
public class IteratorLoopSupportTag extends TagSupport
implements LoopTag, LoopTagStatus {
private JspTag _parent;
private int _begin;
private int _end;
private int _step;
private boolean _beginSpecified = false;
private boolean _endSpecified = false;
private boolean _stepSpecified = false;
private int _index;
private int _count;
private Object _current;
private boolean _hasNext;
/**
* Sets the parent as a JspTag
*/
public void setParent(JspTag parent)
{
_parent = parent;
}
/**
* Sets the parent as a JspTag
*/
public void setParent(Tag parent)
{
_parent = parent;
}
/**
* Returns the parent.
*/
public Tag getParent()
{
if (_parent == null || _parent instanceof Tag)
return (Tag) _parent;
else
return new TagAdapter((SimpleTag) _parent);
}
/**
* Sets the initial values.
*/
public void init(int begin,
int end,
int step,
boolean beginSpecified,
boolean endSpecified,
boolean stepSpecified)
{
_begin = begin;
_end = end;
_step = step;
_beginSpecified = beginSpecified;
_endSpecified = endSpecified;
_stepSpecified = stepSpecified;
_count = 0;
_index = _begin - _step;
}
/**
* Sets the current value.
*/
public void setCurrent(Object current, boolean hasNext)
{
_index += _step;
_current = current;
_hasNext = hasNext;
_count++;
}
/**
* Returns the current value.
*/
public Object getCurrent()
{
return _current;
}
/**
* Returns the loop status
*/
public LoopTagStatus getLoopStatus()
{
return this;
}
public int getIndex()
{
return _index;
}
public int getCount()
{
return _count;
}
public boolean isFirst()
{
return _count == 1;
}
public boolean isLast()
{
return _end < _index + _step || ! _hasNext;
}
public Integer getBegin()
{
if (! _beginSpecified)
return null;
return new Integer(_begin);
}
public Integer getEnd()
{
if (! _endSpecified)
return null;
return new Integer(_end);
}
public Integer getStep()
{
if (! _stepSpecified)
return null;
return new Integer(_step);
}
}