Java tutorial
/* 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.dataman; import java.io.IOException; import java.io.OutputStreamWriter; import java.io.PrintWriter; import java.util.List; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.lang.StringEscapeUtils; import org.json.JSONArray; import org.json.JSONObject; import edu.lafayette.metadb.model.attributes.AdminDescAttributesDAO; 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; import edu.lafayette.metadb.model.metadata.TechnicalDataDAO; import edu.lafayette.metadb.model.permission.Permission; import edu.lafayette.metadb.model.permission.PermissionManDAO; /** * Servlet implementation class ViewMetadata */ public class ViewMetadata extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { PrintWriter out = new PrintWriter(new OutputStreamWriter(response.getOutputStream(), "UTF8"), true); String projname = (String) request.getSession(false).getAttribute(Global.SESSION_PROJECT); String username = (String) request.getSession(false).getAttribute(Global.SESSION_USERNAME); JSONObject output = new JSONObject(); JSONArray headers = new JSONArray(); JSONArray items = new JSONArray(); if (projname == null || projname.equals("")) return; int itemCount = ItemsDAO.nextItemNumber(projname) - 1; try { JSONObject itemNumberHeader = new JSONObject(); itemNumberHeader.put("name", "Filename"); itemNumberHeader.put("editable", false); headers.put(itemNumberHeader); for (int i = 0; i < itemCount; i++) { items.put(new JSONArray()); int itemNumber = i + 1; String[] filePath = ItemsDAO.getMasterPath(projname, itemNumber).split("/"); //String[] itemFilename = filePath[filePath.length - 1].split("-"); String itemName = filePath[filePath.length - 1]; items.getJSONArray(i).put(itemName); } String[] techList = request.getParameterValues(Global.MD_TYPE_TECH); if (techList != null) for (String attr : techList) { String element = attr.split("-")[0]; String[] labelArray = attr.split("-"); String label = labelArray.length > 1 ? labelArray[1] : ""; JSONObject techHeader = new JSONObject(); techHeader.put("name", element + (label.equals("") ? "" : "." + label)); techHeader.put("editable", false); headers.put(techHeader); List<String> techData = TechnicalDataDAO.getMultipleTechnicalData(projname, element, label); for (int i = 0; i < itemCount; i++) { String data = ""; if (i < techData.size()) data = techData.get(i); items.getJSONArray(i).put(data); } } Permission metadataPermission = PermissionManDAO.getUserPermission(username, projname); boolean editAdmin = metadataPermission.getAdmin_md().equals("read_write"); boolean editDesc = metadataPermission.getDesc_md().equals("read_write"); String[] adminList = request.getParameterValues(Global.MD_TYPE_ADMIN); if (adminList != null) for (String attr : adminList) { String[] labelArray = attr.split("-"); String element = labelArray[0]; String label = labelArray.length > 1 ? labelArray[1] : ""; List<String> adminDescData = AdminDescDataDAO.getMultipleAdminDescData(projname, element, label, Global.MD_TYPE_ADMIN); //MetaDbHelper.note("Select size "+adminDescData.size()); JSONObject adminHeader = new JSONObject(); adminHeader.put("name", element + (label.equals("") ? "" : "." + label)); adminHeader.put("editable", editAdmin); headers.put(adminHeader); for (int i = 0; i < itemCount; i++) { String data = ""; if (i < adminDescData.size()) data = StringEscapeUtils.escapeHtml(adminDescData.get(i)); items.getJSONArray(i).put(data); } } String[] descList = request.getParameterValues(Global.MD_TYPE_DESC); if (descList != null) for (String attr : descList) { String[] labelArray = attr.split("-"); String element = labelArray[0]; String label = labelArray.length > 1 ? labelArray[1] : ""; List<String> adminDescData = AdminDescDataDAO.getMultipleAdminDescData(projname, element, label, Global.MD_TYPE_DESC); //MetaDbHelper.note("Select size "+adminDescData.size()); JSONObject descHeader = new JSONObject(); descHeader.put("name", element + (label.equals("") ? "" : "." + label)); descHeader.put("editable", editDesc); headers.put(descHeader); for (int i = 0; i < itemCount; i++) { String data = ""; if (i < adminDescData.size()) if (AdminDescAttributesDAO.getAttributeByName(projname, element, label).isSorted()) data = StringEscapeUtils.escapeHtml(MetaDbHelper.sortVocab(adminDescData.get(i))); else data = StringEscapeUtils.escapeHtml(adminDescData.get(i)); items.getJSONArray(i).put(data); } } output.put("headers", headers); output.put("items", items); } catch (Exception e) { MetaDbHelper.logEvent(e); } out.print(output); out.flush(); } }