edu.lternet.pasta.portal.UserBrowseServlet.java Source code

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Here is the source code for edu.lternet.pasta.portal.UserBrowseServlet.java

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/*
 *
 * $Date$
 * $Author$
 * $Revision$
 *
 * Copyright 2011,2012 the University of New Mexico.
 *
 * This work was supported by National Science Foundation Cooperative
 * Agreements #DEB-0832652 and #DEB-0936498.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0.
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific
 * language governing permissions and limitations under the License.
 *
 */

package edu.lternet.pasta.portal;

import java.io.IOException;

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

import org.apache.commons.lang3.text.StrTokenizer;
import org.apache.log4j.Logger;

import edu.lternet.pasta.client.DataPackageManagerClient;
import edu.lternet.pasta.common.EmlPackageId;
import edu.lternet.pasta.common.EmlPackageIdFormat;

public class UserBrowseServlet extends DataPortalServlet {

    /**
     * Class variables
     */

    private static final Logger logger = Logger.getLogger(edu.lternet.pasta.portal.UserBrowseServlet.class);
    private static final long serialVersionUID = 1L;

    /**
     * Constructor of the object.
     */
    public UserBrowseServlet() {
        super();
    }

    /**
     * Destruction of the servlet. <br>
     */
    public void destroy() {
        super.destroy(); // Just puts "destroy" string in log
        // Put your code here
    }

    /**
     * The doGet method of the servlet. <br>
     * 
     * This method is called when a form has its tag value method equals to get.
     * 
     * @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 doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        doPost(request, response);

    }

    /**
     * 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 {
        HttpSession httpSession = request.getSession();
        String uid = (String) httpSession.getAttribute("uid");
        String distinguishedName = (String) httpSession.getAttribute("uid");
        String forward = null;
        String browseMessage = "View a data package you have uploaded.";

        if (uid == null || uid.isEmpty() || uid.equals("public") || distinguishedName == null
                || distinguishedName.isEmpty()) {
            String message = LOGIN_WARNING;
            forward = "./login.jsp";
            request.setAttribute("message", message);
            request.setAttribute("from", "userBrowseServlet");
        } else {
            forward = "./dataPackageBrowser.jsp";

            String text = null;
            String html = null;
            Integer count = 0;

            try {

                DataPackageManagerClient dpmClient = new DataPackageManagerClient(uid);
                text = dpmClient.listUserDataPackages(distinguishedName);
                StrTokenizer tokens = new StrTokenizer(text);
                html = "<ol>\n";
                EmlPackageIdFormat epif = new EmlPackageIdFormat();

                while (tokens.hasNext()) {
                    String packageId = tokens.nextToken();
                    EmlPackageId epid = epif.parse(packageId);
                    String scope = epid.getScope();
                    Integer identifier = epid.getIdentifier();
                    Integer revision = epid.getRevision();
                    html += String.format(
                            "<li><a class=\"searchsubcat\" href=\"./mapbrowse?scope=%s&identifier=%d&revision=%d\">%s</a></li>\n",
                            scope, identifier, revision, packageId);
                    count++;
                }

                html += "</ol>\n";
                request.setAttribute("html", html);
                request.setAttribute("count", count.toString());
                if (count < 1) {
                    browseMessage = String.format("No data packages have been uploaded by user '%s'.",
                            distinguishedName);
                }
                request.setAttribute("browsemessage", browseMessage);
            } catch (Exception e) {
                handleDataPortalError(logger, e);
            }
        }

        RequestDispatcher requestDispatcher = request.getRequestDispatcher(forward);
        requestDispatcher.forward(request, response);
    }

    /**
     * Initialization of the servlet. <br>
     * 
     * @throws ServletException
     *           if an error occurs
     */
    public void init() throws ServletException {
        // Put your code here
    }

}