oeg.rdflicense.servlet.ListServlet.java Source code

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Here is the source code for oeg.rdflicense.servlet.ListServlet.java

Source

package oeg.rdflicense.servlet;

import javax.servlet.http.HttpServlet;
//JAVA
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.List;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.http.*;
import oeg.rdflicense.RDFLicense;
import oeg.rdflicense.RDFLicenseDataset;

//LOG4J
import oeg.rdflicense.servlet.MainServlet;
import org.apache.commons.io.FileUtils;

/**
 * This servlet is used by the user interface to show paginated answers
 * @author Victor
 */
public class ListServlet extends HttpServlet {
    private static final Logger logger = Logger.getLogger(ListServlet.class.getName());

    //Static so that it is read only one
    static private RDFLicenseDataset dataset = null;
    private static List<RDFLicense> licenses = new ArrayList();

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    public void processRequest(HttpServletRequest request, HttpServletResponse resp) throws IOException {
        String offset = request.getParameter("current");
        String limit = request.getParameter("rowCount");
        int current = 1;
        int ilimit = 10;
        int init = 0;
        if (offset != null)
            current = Integer.parseInt(offset);
        if (limit != null)
            ilimit = Integer.parseInt(limit);
        init = (current - 1) * ilimit;

        System.err.println("Licenses nulas: " + (licenses == null));
        System.err.println("Ahora mismo hay cargadas " + licenses.size() + " licencias!");
        if (licenses.isEmpty()) {
            RDFLicenseDataset dataset = new RDFLicenseDataset();
            licenses = dataset.getRDFLicenses();
        }
        List<RDFLicense> filtradas = new ArrayList();
        filtradas.addAll(licenses);

        String search = request.getParameter("searchPhrase");
        int total = filtradas.size();
        ilimit = Math.min(ilimit, total);

        ilimit = init + 10;

        logger.info("XXX: " + total + " " + current + " " + ilimit);
        System.err.println("TOTAL:  " + total + "CURRENT: " + current + " INIT: " + init + " LIMIT: " + ilimit);

        if (total == 0) {
            current = 0;
            ilimit = 0;
        }

        /*
                filtradas = dataset.filterBy(filtradas, search);
                init = Math.min(init, total-1);
                current = Math.min(current, total-1);
                ilimit = Math.min(ilimit, total-1);
        */

        String s = "{\n" + "  \"current\": " + current + ",\n" + "  \"rowCount\": " + ilimit + ",\n"
                + "  \"rows\": [\n";
        int conta = 0;
        for (int i = init; i < ilimit; i++) {
            RDFLicense license = filtradas.get(i);
            if (conta != 0) {
                s += ",\n";
            }

            String titulo = license.getLabel() + " " + license.getVersion();

            s += "    {\n" + "      \"license\": \"" + titulo + "\",\n" + "      \"licenseurl\": \""
                    + license.getURI() + "\"\n" + "    } ";
            conta++;
        }
        s += "  ],\n" + "  \"total\": " + total + "\n" + "}    ";
        PrintWriter out = resp.getWriter();
        out.print(s);
        resp.setStatus(HttpServletResponse.SC_OK);
        resp.setContentType("application/json");
    }
}