de.htwg_konstanz.ebus.wholesaler.demo.ImportXML.java Source code

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Here is the source code for de.htwg_konstanz.ebus.wholesaler.demo.ImportXML.java

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package de.htwg_konstanz.ebus.wholesaler.demo;

import de.htwg_konstanz.ebus.framework.wholesaler.api.security.Security;
import static de.htwg_konstanz.ebus.wholesaler.demo.ExportXML.PARAM_LOGIN_BEAN;
import de.htwg_konstanz.ebus.wholesaler.demo.util.Constants;
import de.htwg_konstanz.ebus.wholesaler.demo.workclasses.ParseReportDTO;
import de.htwg_konstanz.ebus.wholesaler.demo.workclasses.ReportDTO;
import de.htwg_konstanz.ebus.wholesaler.demo.workclasses.SaveProductsToDatabase;
import de.htwg_konstanz.ebus.wholesaler.demo.workclasses.Upload;
import de.htwg_konstanz.ebus.wholesaler.demo.workclasses.XmlParser;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.ListIterator;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.parsers.ParserConfigurationException;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.xml.sax.SAXException;

/**
 *
 * @author Felix
 */
public class ImportXML implements IAction {

    /**
     * Gets the Instanz of the Upload class.
     */
    private final Upload upload = new Upload();

    /**
     * Gets the instace of the Xml Parser.
     */
    private final XmlParser xmlParser = new XmlParser();

    /**
     * Gets the instance of the SaveProductsToDatabase Class.
     */
    private final SaveProductsToDatabase saveProduct = SaveProductsToDatabase.getInstance();

    @Override
    public final String execute(final HttpServletRequest request, final HttpServletResponse response,
            final ArrayList<String> errorList) {
        // get the login bean from the session
        LoginBean loginBean = (LoginBean) request.getSession(true).getAttribute(PARAM_LOGIN_BEAN);

        // ensure that the user is logged in
        if (loginBean != null && loginBean.isLoggedIn()) {
            // ensure that the user is allowed to execute this action (authorization)
            // at this time the authorization is not fully implemented.
            // -> use the "Security.RESOURCE_ALL" constant which includes all resources.
            if (Security.getInstance().isUserAllowed(loginBean.getUser(), Security.RESOURCE_ALL,
                    Security.ACTION_READ)) {
                response.setContentType("text/html;charset=UTF-8");
                /*--------------------------------------
                 -- Start Import
                 ----------------------------------------*/
                // Input Stream which has to be parsed
                InputStream is;
                // Check if the form was sended
                if (ServletFileUpload.isMultipartContent(request)) {
                    try {
                        is = upload.upload(request);
                        // Server-Side check if a File was chosen or if it was an emty File
                        if (is == null) {
                            return "importxml.jsp?errormessage=File was empty!!!!!!! Or wrong file-type. only xml is allowed";
                        }

                        // Returns the valid XML document
                        ParseReportDTO report = xmlParser.validateTheXml(is);
                        org.w3c.dom.Document doc = report.getDoc();
                        if (doc == null) {
                            return "importxml.jsp?errormessage=" + report.getMessage();
                        }

                        System.out.println(doc);

                        // Reads the XML-File and saves the Products to the Database
                        ReportDTO returnval = saveProduct.readXML(doc);

                        // Writes the products which are already in database to the URL
                        String notimported = "";
                        if (returnval.getNotImported() != null) {
                            ListIterator<Integer> li = returnval.getNotImported().listIterator();
                            while (li.hasNext()) {
                                notimported = notimported + li.next() + ",";
                            }
                        }

                        if (returnval.getType()) {
                            return "importxml.jsp?infomessage=" + returnval.getMessage();
                        } else {
                            return "importxml.jsp?errormessage=" + returnval.getMessage() + "&notimported="
                                    + notimported;
                        }
                        // XML File Validieeren
                    } catch (FileUploadException | IOException | SAXException | ParserConfigurationException ex) {
                        Logger.getLogger(ImportXML.class.getName()).log(Level.SEVERE, null, ex);
                    }
                }
                // Rendering the import page
                return "importxml.jsp";
            } else {
                // authorization failed -> show error message
                errorList.add("You are not allowed to perform this action!");
                // redirect to the welcome page
                return "welcome.jsp";
            }
        } else {
            // redirect to the login page
            return "login.jsp";
        }
    }

    @Override
    public final boolean accepts(final String actionName) {
        return actionName.equalsIgnoreCase(Constants.ACTION_SHOW_IMPORTJSP);
    }

}