/* ================================================================

 * Cewolf : Chart enabling Web Objects Framework

 * ================================================================

 *

 * Project Info:  http://cewolf.sourceforge.net

 * Project Lead:  Guido Laures (guido@laures.de);

 *

 * (C) Copyright 2002, by Guido Laures

 *

 * This library is free software; you can redistribute it and/or modify it under the terms

 * of the GNU Lesser General Public License as published by the Free Software Foundation;

 * either version 2.1 of the License, or (at your option) any later version.

 *

 * This library 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.

 * See the GNU Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License along with this

 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,

 * Boston, MA 02111-1307, USA.

 */

package de.laures.cewolf.taglib.tags;

import javax.servlet.jsp.JspException;

import de.laures.cewolf.ChartPostProcessor;

import de.laures.cewolf.taglib.util.PageUtils;

/** 

 * Tag to define a post processor.

 * @see ChartPostProcessor

 * @author  Guido Laures 

 */

public class ChartPostProcessorTag extends AbstractParameterizedObjectTag {

    public int doEndTag() throws JspException {

        ChartPostProcessor pp = null;

        try {

            pp = (ChartPostProcessor)getObject();

            if (pp == null) {

                throw new JspException("Could not find ChartEnhanncer under ID '" + getId() + "'");

            }

        } catch (ClassCastException cce) {

            throw new JspException("Bean under ID '" + getId() + "' is of type '"

            + pp.getClass().getName() +

            "'.\nType expected:" + ChartPostProcessor.class.getName());

        }

        AbstractChartTag rt = (AbstractChartTag)PageUtils.findRoot(this, pageContext);

        rt.addChartPostProcessor((ChartPostProcessor)getObject(), getParameters());

        return doAfterEndTag(EVAL_PAGE);

    }

}