/* ===============================================================================
*
* Part of the InfoGlue Content Management Platform (www.infoglue.org)
*
* ===============================================================================
*
* Copyright (C)
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License version 2, as published by the
* Free Software Foundation. See the file LICENSE.html for more information.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY, including the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc. / 59 Temple
* Place, Suite 330 / Boston, MA 02111-1307 / USA.
*
* ===============================================================================
*/
package org.infoglue.cms.treeservice;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.log4j.Logger;
import org.infoglue.cms.net.CommunicationEnvelope;
import org.infoglue.cms.net.Node;
public abstract class JServiceBuilder extends HttpServlet
{
private final static Logger logger = Logger.getLogger(JServiceBuilder.class.getName());
protected HttpServletRequest request;
public void init(ServletConfig config) throws ServletException
{
super.init(config);
}
public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
this.request = request;
Hashtable inHash = requestToHashtable(request);
logger.info("Got request...");
PrintWriter out = null;
try
{
// get an input stream from the applet
out = response.getWriter();
CommunicationEnvelope requestEnvelope = deserializeEnvelope(inHash);
CommunicationEnvelope reponseEnvelope = execute(requestEnvelope);
String responseString = toEncodedString(serializeEnvelope(reponseEnvelope));
// send back a confirmation message to the applet
logger.info("Sending the string to the applet:" + responseString);
out.println(responseString);
out.flush();
out.close();
logger.info("Complete.");
}
catch (Exception e)
{
e.printStackTrace();
}
}
/**
* Encodes a hash table to an URL encoded string.
*
* @param inHash The hash table you would like to encode
* @return A URL encoded string.
*/
private String toEncodedString(Hashtable inHash) throws Exception
{
StringBuffer buffer = new StringBuffer();
Enumeration names = inHash.keys();
while(names.hasMoreElements())
{
String name = names.nextElement().toString();
String value = inHash.get(name).toString();
buffer.append(URLEncoder.encode(name, "UTF-8") + "=" + URLEncoder.encode(value, "UTF-8"));
if(names.hasMoreElements())
{
buffer.append("&");
}
}
return buffer.toString();
}
private CommunicationEnvelope deserializeEnvelope(Hashtable hash)
{
CommunicationEnvelope communicationEnvelope = new CommunicationEnvelope();
communicationEnvelope.setAction("" + hash.get("action"));
communicationEnvelope.setStatus("" + hash.get("status"));
logger.info("Action:" + communicationEnvelope.getAction());
logger.info("Status:" + communicationEnvelope.getStatus());
List nodes = new ArrayList();
int i = 0;
String id = (String)hash.get("nodeList." + i + ".id");
while(id != null)
{
Node n = new Node();
n.setId(new Integer(id));
n.setName((String)hash.get("nodeList." + i + ".name"));
n.setIsBranch(new Boolean((String)hash.get("nodeList." + i + ".isBranch")));
nodes.add(n);
logger.info("Node:" + n);
i++;
id = (String)hash.get("nodeList." + i + ".id");
}
communicationEnvelope.setNodes(nodes);
return communicationEnvelope;
}
private Hashtable serializeEnvelope(CommunicationEnvelope requestEnvelope)
{
Hashtable hash = new Hashtable();
logger.info("Serializing:" + requestEnvelope);
hash.put("action", requestEnvelope.getAction());
hash.put("status", requestEnvelope.getStatus());
List nodes = requestEnvelope.getNodes();
int i = 0;
Iterator iterator = nodes.iterator();
while(iterator.hasNext())
{
Node n = (Node)iterator.next();
hash.put("nodeList." + i + ".id", "" + n.getId());
hash.put("nodeList." + i + ".name", "" + n.getName());
hash.put("nodeList." + i + ".isBranch", "" + n.getIsBranch());
i++;
}
return hash;
}
public Hashtable requestToHashtable(HttpServletRequest req)
{
Hashtable input = new Hashtable();
for (Enumeration e = req.getParameterNames(); e.hasMoreElements() ;)
{
String name = (String)e.nextElement();
String value = (String)req.getParameter(name);
input.put(name, value);
}
return input;
}
public abstract CommunicationEnvelope execute(CommunicationEnvelope envelope);
}