reqtoeventtranslator.java.svn-base

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package com.nsi.control.web;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.nsi.control.event.NsiEvent;
import com.nsi.control.exceptions.NsiEventException;
import com.nsi.control.web.handles.ReqHandler;

public class ReqToEventTranslator
{
	private static Log log = LogFactory.getLog(ReqToEventTranslator.class);
	private ScreenManager screenManager;
	public ReqToEventTranslator(ScreenManager screenManager)
	{
		this.screenManager = screenManager;
	}
	public ScreenManager getScreenManager()
	{
		return screenManager;
	}
	public void setScreenManager(ScreenManager screenManager)
	{
		this.screenManager = screenManager;
	}
	public NsiEvent processRequest(HttpServletRequest req,HttpServletResponse res) throws NsiEventException
	{
		String selectedUrl = req.getParameter("urlmapping");
		NsiEvent event = null;
		String reqProcessorString = null;
		URLMapping urlMapping = screenManager.getURLMapping(selectedUrl);
		if(urlMapping != null)
		{
			reqProcessorString = urlMapping.getRequestHandler();
			log.debug("###########  -- reqProcessorString[" + reqProcessorString + "]");
			if(urlMapping.isUseRequestHandler())
			{
				ReqHandler handler = null;
				try
				{
					handler = (ReqHandler)getClass().getClassLoader().loadClass(reqProcessorString).newInstance();
					event = handler.processRequest(req,res);
				}
				catch(Exception ex)
				{
					log.error("RequestToEventTranslator caught loading handler: ", ex );
					throw new NsiEventException("RequestToEventTranslator ==> ", ex);
				}
			}
		}
		return event;
	}
}