edu.cornell.mannlib.vitro.webapp.sparql.GetClazzDataProperties.java Source code

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Here is the source code for edu.cornell.mannlib.vitro.webapp.sparql.GetClazzDataProperties.java

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/* $This file is distributed under the terms of the license in /doc/license.txt$ */
package edu.cornell.mannlib.vitro.webapp.sparql;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;

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

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

import edu.cornell.mannlib.vedit.controller.BaseEditController;
import edu.cornell.mannlib.vitro.webapp.auth.permissions.SimplePermission;
import edu.cornell.mannlib.vitro.webapp.beans.DataProperty;
import edu.cornell.mannlib.vitro.webapp.controller.VitroRequest;
import edu.cornell.mannlib.vitro.webapp.dao.DataPropertyDao;

/**
 * This servlet gets all the data properties for a given subject.
 * 
 * @param vClassURI
 * @author yuysun
 */

public class GetClazzDataProperties extends BaseEditController {

    private static final Log log = LogFactory.getLog(GetClazzDataProperties.class);

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        if (!isAuthorizedToDisplayPage(request, response, SimplePermission.USE_MISCELLANEOUS_PAGES.ACTION)) {
            return;
        }

        VitroRequest vreq = new VitroRequest(request);

        String vClassURI = vreq.getParameter("vClassURI");
        if (vClassURI == null || vClassURI.trim().equals("")) {
            return;
        }

        String respo = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>";
        respo += "<options>";

        // Add rdfs:label to the list
        respo += "<option>" + "<key>" + "label" + "</key>" + "<value>"
                + "http://www.w3.org/2000/01/rdf-schema#label" + "</value>" + "</option>";

        DataPropertyDao ddao = vreq.getUnfilteredWebappDaoFactory().getDataPropertyDao();

        Collection<DataProperty> dataProps = ddao.getDataPropertiesForVClass(vClassURI);
        Iterator<DataProperty> dataPropIt = dataProps.iterator();
        HashSet<String> dpropURIs = new HashSet<String>();
        while (dataPropIt.hasNext()) {
            DataProperty dp = dataPropIt.next();
            if (!(dpropURIs.contains(dp.getURI()))) {
                dpropURIs.add(dp.getURI());
                DataProperty dprop = (DataProperty) ddao.getDataPropertyByURI(dp.getURI());
                if (dprop != null) {
                    respo += "<option>" + "<key>" + dprop.getLocalName() + "</key>" + "<value>" + dprop.getURI()
                            + "</value>" + "</option>";
                }
            }
        }
        respo += "</options>";
        response.setContentType("text/xml");
        response.setCharacterEncoding("UTF-8");
        PrintWriter out = response.getWriter();

        out.println(respo);
        out.flush();
        out.close();
    }

    /**
     * The doPost method of the servlet. <br>
     * 
     * This method is called when a form has its tag value method equals to
     * post.
     * 
     * @param request
     *            the request send by the client to the server
     * @param response
     *            the response send by the server to the client
     * @throws ServletException
     *             if an error occurred
     * @throws IOException
     *             if an error occurred
     */
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        doGet(request, response);
    }
}