edu.lafayette.metadb.web.metadata.UpdateMultipleMetadata.java Source code

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Here is the source code for edu.lafayette.metadb.web.metadata.UpdateMultipleMetadata.java

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/*
  MetaDB: A Distributed Metadata Collection Tool
  Copyright 2011, Lafayette College, Eric Luhrs, Haruki Yamaguchi, Long Ho.
    
  This file is part of MetaDB.
    
MetaDB is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
    
MetaDB is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with MetaDB.  If not, see <http://www.gnu.org/licenses/>.
 */
package edu.lafayette.metadb.web.metadata;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

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

import org.json.JSONArray;
import org.json.JSONObject;

import edu.lafayette.metadb.model.commonops.Global;
import edu.lafayette.metadb.model.commonops.MetaDbHelper;
import edu.lafayette.metadb.model.items.ItemsDAO;
import edu.lafayette.metadb.model.metadata.AdminDescDataDAO;

/**
 * Servlet implementation class UpdateMultipleMetadata
 */
public class UpdateMultipleMetadata extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
    * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
    */
    @SuppressWarnings("unchecked")
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        // TODO Auto-generated method stub
        PrintWriter out = response.getWriter();
        try {
            HttpSession session = request.getSession(false);
            String projname = (String) session.getAttribute(Global.SESSION_PROJECT);
            String type = request.getParameter("type");
            String records = request.getParameter("records");
            JSONArray failed_items = new JSONArray();
            JSONObject output = new JSONObject();
            String message = "";
            String failedRecords = "";
            if (records != null) {
                List<Integer> chosenRecords = null;
                if (records.equals("all"))
                    chosenRecords = AdminDescDataDAO.getAdminDescItemNumbers(projname, type);
                else
                    chosenRecords = new ArrayList<Integer>(this.filterRecords(records));

                if (chosenRecords != null && !chosenRecords.isEmpty()) {
                    Map<String, String[]> attributes = new HashMap<String, String[]>(request.getParameterMap());
                    attributes.remove("project-name");
                    attributes.remove("type");
                    attributes.remove("records");
                    //message = type+" Records are updating...\n";
                    for (int i = 0; i < chosenRecords.size(); i++) {
                        String userName = (String) session.getAttribute("username");
                        String locker = ItemsDAO.getLocker(projname, chosenRecords.get(i));
                        boolean process = true;
                        if (!(userName.equals(locker) || locker.trim().equals("") || locker == null)) {
                            failedRecords += " " + chosenRecords.get(i);
                            process = false; //Do not touch this record if it is locked.
                        }

                        //Update all the attributes for item i
                        Set keys = attributes.keySet();
                        Iterator itr = keys.iterator();
                        while (itr.hasNext()) {
                            String entry = (String) itr.next();
                            int id = Integer.parseInt(entry);
                            //                     String newData = attributes.get(entry)[0] == null ? "": attributes.get(entry)[0];
                            JSONObject whitelisted = UpdateAdminDescMetadata.whitelist(entry, projname, type,
                                    chosenRecords.get(i), request);
                            if (!whitelisted.getBoolean("success")) {
                                //MetaDbHelper.note(whitelisted.toString());
                                //MetaDbHelper.note(entry+" "+projname+" "+type+" "+chosenRecords.get(i));
                                failed_items.put(whitelisted);
                                break;
                            }
                            if (process) {
                                if (!AdminDescDataDAO.updateAdminDescData(projname, chosenRecords.get(i), id,
                                        whitelisted.getString("data")))
                                    failedRecords += " " + chosenRecords.get(i); //even if locker check succeeded, could still fail.
                            }
                        }
                    }
                    message = "Data updates complete.\n";
                    if (!(failedRecords.trim().equals("")))
                        message += "The following item(s) could not be updated:" + failedRecords;
                }
            } else
                message = "No attributes in project";
            output.put("failure", failed_items);
            output.put("message", message);
            output.put("type", type);
            out.print(output);
        } catch (Exception e) {
            MetaDbHelper.logEvent(e);
        }
        out.close();
    }

    private Set<Integer> filterRecords(String source) {
        Set<Integer> records = new HashSet<Integer>();
        String[] processedEntries = source.split(",");
        try {
            for (String entry : processedEntries) {
                if (entry != null && entry != "") {
                    if (entry.indexOf("-") != -1) {
                        int min = Integer.parseInt(entry.split("-")[0]);
                        int max = Integer.parseInt(entry.split("-")[1]);
                        for (int i = min; i <= max; i++)
                            records.add(i);
                    } else
                        records.add(Integer.parseInt(entry));
                }
            }
        } catch (Exception e) {
            records.clear();
        }
        return records;

    }

}