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[simdecs2.git] / src / java / org / ufcspa / simdecs / comunicacao / BaseComunicacao.java

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package org.ufcspa.simdecs.comunicacao;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Iterator;
import java.util.Map;
import javax.persistence.EntityManager;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.ufcspa.simdecs.util.DbUtil;

/**
 *
 * @author maroni
 */
public abstract class BaseComunicacao extends HttpServlet {

    protected String clear(String text) {
        String cleanText = text;
        
        cleanText = cleanText.replaceAll("\"", """);
        cleanText = cleanText.replaceAll("<", "&lt;");
        cleanText = cleanText.replaceAll(">", "&gt;");
        cleanText = cleanText.replaceAll("&", "&amp;");
        cleanText = cleanText.replaceAll("'", "&apos;");
        
        return cleanText;        
    }
    
    protected String clear(Long text) {
        return clear(text.toString());
    }

    protected String clear(Float text) {
        return clear(text.toString());
    }

    protected String clear(Integer text) {
        return clear(text.toString());
    }
    
    protected static String stack2string(Exception e) {
        try {
            StringWriter sw = new StringWriter();
            PrintWriter pw = new PrintWriter(sw);
            e.printStackTrace(pw);
            return "------\r\n" + sw.toString() + "------\r\n";
        } catch (Exception e2) {
            return "bad stack2string";
        }
    }

    protected final void printDebug(String print) {
        System.out.println(print);
    }
    
    protected abstract void executaServico(EntityManager em, HttpServletRequest request, HttpServletResponse response, PrintWriter out) throws Exception;

    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        EntityManager em = DbUtil.getInstance().getEntityManager();

        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();

        // Debug do Servlet        
        printDebug("------------------------------------------------------------------------------------");
        printDebug("METODO....: " + this.getClass());
        printDebug("PARAMETROS: ");
        Map params = request.getParameterMap();
        Iterator i = params.keySet().iterator();
    
        while ( i.hasNext() )
        {
            String key = (String) i.next();
            String value = ((String[]) params.get( key ))[ 0 ];
            printDebug("   " +  key + ": " + value);
        }    
        printDebug("------------------------------------------------------------------------------------");

        try {

            executaServico(em, request, response, out);
        } catch(Exception e) {
            out.println("<xml>" );
            out.println("   <execucao sucesso=\"nao\" />" );
            out.println("   <erro metodo=\"" + this.getServletName() + "\">" );
            
            Map paramsError = request.getParameterMap();
            Iterator iError = paramsError.keySet().iterator();
            StringBuilder parametros = new StringBuilder();
            while ( iError.hasNext() )
            {
                String key = (String) iError.next();
                String value = ((String[]) paramsError.get( key ))[ 0 ];
                parametros.append(";");
                parametros.append(key);
                parametros.append(":");
                parametros.append(value);
            }    
            out.println("       <parametros descricao=\"" + parametros.substring(1) + "\" />");
            out.println("       <mensagem erro=\"" + stack2string(e) + "\" />");
            out.println("   </erro>" );
            out.println("</xml>" );
            
            e.printStackTrace();
        } finally { 
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}