| 1 | /* |
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| 2 | * To change this license header, choose License Headers in Project Properties. |
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| 3 | * To change this template file, choose Tools | Templates |
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| 4 | * and open the template in the editor. |
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| 5 | */ |
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| 6 | |
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| 7 | package org.biohackathon.SPARQLBuilder.www; |
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| 8 | |
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| 9 | import java.io.IOException; |
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| 10 | import java.io.PrintWriter; |
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| 11 | import java.util.ArrayList; |
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| 12 | import java.util.Arrays; |
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| 13 | import java.util.Iterator; |
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| 14 | import java.util.List; |
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| 15 | import java.util.logging.Level; |
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| 16 | import java.util.logging.Logger; |
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| 17 | import javax.servlet.ServletException; |
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| 18 | import javax.servlet.annotation.WebServlet; |
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| 19 | import javax.servlet.http.HttpServlet; |
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| 20 | import javax.servlet.http.HttpServletRequest; |
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| 21 | import javax.servlet.http.HttpServletResponse; |
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| 22 | import org.biohackathon.SPARQLBuilder.OWL.*; |
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| 23 | import org.json.JSONArray; |
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| 24 | import org.json.JSONException; |
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| 25 | import org.json.JSONObject; |
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| 26 | |
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| 27 | //import javax.json.Json; |
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| 28 | |
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| 29 | /** |
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| 30 | * |
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| 31 | * @author atsuko |
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| 32 | */ |
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| 33 | @WebServlet(name = "SPServlet", urlPatterns = {"/sparql"}) |
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| 34 | public class SPServlet extends HttpServlet { |
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| 35 | |
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| 36 | /** |
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| 37 | * Processes requests for both HTTP <code>GET</code> and <code>POST</code> |
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| 38 | * methods. |
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| 39 | * |
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| 40 | * @param request servlet request |
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| 41 | * @param response servlet response |
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| 42 | * @throws ServletException if a servlet-specific error occurs |
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| 43 | * @throws IOException if an I/O error occurs |
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| 44 | */ |
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| 45 | protected void processRequest(HttpServletRequest request, HttpServletResponse response) |
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| 46 | throws ServletException, IOException { |
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| 47 | response.setContentType("text/html;charset=UTF-8"); |
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| 48 | try (PrintWriter out = response.getWriter()) { |
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| 49 | /* TODO output your page here. You may use following sample code. */ |
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| 50 | out.println("<!DOCTYPE html>"); |
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| 51 | out.println("<html>"); |
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| 52 | out.println("<head>"); |
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| 53 | out.println("<title>Servlet SPServlet</title>"); |
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| 54 | out.println("</head>"); |
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| 55 | out.println("<body>"); |
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| 56 | out.println("<h1>Servlet SPServlet at " + request.getContextPath() + "</h1>"); |
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| 57 | out.println("</body>"); |
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| 58 | out.println("</html>"); |
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| 59 | } |
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| 60 | } |
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| 61 | |
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| 62 | // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code."> |
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| 63 | /** |
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| 64 | * Handles the HTTP <code>GET</code> method. |
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| 65 | * |
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| 66 | * @param request servlet request |
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| 67 | * @param response servlet response |
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| 68 | * @throws ServletException if a servlet-specific error occurs |
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| 69 | * @throws IOException if an I/O error occurs |
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| 70 | */ |
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| 71 | @Override |
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| 72 | /* protected void doGet(HttpServletRequest request, HttpServletResponse response) |
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| 73 | throws ServletException, IOException { |
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| 74 | processRequest(request, response); |
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| 75 | }*/ |
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| 76 | protected void doGet(HttpServletRequest request, HttpServletResponse response) |
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| 77 | throws ServletException, IOException { |
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| 78 | //processRequest(request, response); |
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| 79 | response.setContentType("application/json;charset=UTF-8"); |
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| 80 | PrintWriter out = response.getWriter(); |
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| 81 | String jpath = request.getParameter("jsonpath"); |
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| 82 | List<String> path = null; |
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| 83 | try { |
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| 84 | path = convertJ2Path(jpath); |
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| 85 | } catch (JSONException ex) { |
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| 86 | Logger.getLogger(SPServlet.class.getName()).log(Level.SEVERE, null, ex); |
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| 87 | } |
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| 88 | String query = null; |
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| 89 | try { |
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| 90 | query = convertPath2SPARQL(path); |
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| 91 | } catch (Exception ex) { |
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| 92 | Logger.getLogger(SPServlet.class.getName()).log(Level.SEVERE, null, ex); |
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| 93 | } |
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| 94 | out.print(query); |
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| 95 | } |
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| 96 | |
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| 97 | |
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| 98 | |
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| 99 | /** |
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| 100 | * Handles the HTTP <code>POST</code> method. |
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| 101 | * |
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| 102 | * @param request servlet request |
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| 103 | * @param response servlet response |
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| 104 | * @throws ServletException if a servlet-specific error occurs |
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| 105 | * @throws IOException if an I/O error occurs |
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| 106 | */ |
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| 107 | @Override |
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| 108 | protected void doPost(HttpServletRequest request, HttpServletResponse response) |
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| 109 | throws ServletException, IOException { |
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| 110 | processRequest(request, response); |
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| 111 | } |
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| 112 | |
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| 113 | /** |
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| 114 | * Returns a short description of the servlet. |
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| 115 | * |
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| 116 | * @return a String containing servlet description |
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| 117 | */ |
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| 118 | @Override |
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| 119 | public String getServletInfo() { |
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| 120 | return "Short description"; |
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| 121 | }// </editor-fold> |
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| 122 | |
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| 123 | private static List<String> convertJ2Path(String jpath) throws JSONException{ |
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| 124 | List <String> list = null; |
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| 125 | String temp =(String) jpath.subSequence(2, jpath.length()-2); |
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| 126 | // if (temp.contains(","")) |
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| 127 | list =Arrays.asList(temp.split("\",\"")); |
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| 128 | return list; |
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| 129 | |
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| 130 | /* JSONArray classLinks=new JSONArray(jpath); |
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| 131 | String string; |
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| 132 | |
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| 133 | for (int i=0;i<classLinks.length();i++) |
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| 134 | { |
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| 135 | string = classLinks.getJSONObject(i).toString(); |
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| 136 | if (string.contains(",")) { |
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| 137 | list =Arrays.asList(string.split(",")); |
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| 138 | |
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| 139 | } else |
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| 140 | throw new IllegalArgumentException("path error"); |
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| 141 | |
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| 142 | }*/ |
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| 143 | |
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| 144 | // return list; |
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| 145 | } |
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| 146 | |
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| 147 | private static String convertPath2SPARQL(List<String> path) throws Exception{ |
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| 148 | if( path == null ){ |
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| 149 | throw new Exception("Path is null."); |
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| 150 | } |
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| 151 | |
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| 152 | |
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| 153 | //List<String> classLinks = path.getClassLinks(); |
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| 154 | |
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| 155 | StringBuffer queryStr = new StringBuffer(); |
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| 156 | StringBuffer selStr = new StringBuffer(); |
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| 157 | StringBuffer whereStr = new StringBuffer(); |
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| 158 | // if(num==0){ |
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| 159 | // int num = classLinks.size(); |
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| 160 | // } |
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| 161 | |
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| 162 | queryStr.append("PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>\n"); |
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| 163 | queryStr.append("PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>\n"); |
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| 164 | |
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| 165 | selStr.append("SELECT "); |
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| 166 | whereStr.append("WHERE { \n"); |
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| 167 | |
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| 168 | String properties = null; |
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| 169 | String objectClasses = null; |
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| 170 | String subjectClasses = null; |
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| 171 | Direction direction = null; |
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| 172 | int i = 0; |
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| 173 | int k = 0; |
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| 174 | |
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| 175 | String startClass = path.get(path.size()-1); |
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| 176 | List<String> classLinks = null; |
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| 177 | // ArrayList<String> array= (String[])path.toArray(); |
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| 178 | |
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| 179 | // classLinks.add(path.get(i)); |
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| 180 | |
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| 181 | int num =(path.size()-1)/2; |
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| 182 | |
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| 183 | for(int j=path.size()-2;j>0;j=j-2) |
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| 184 | { |
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| 185 | // properties = link.getPropertyURI(); |
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| 186 | // objectClasses = link.getLinkedClassURI(); |
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| 187 | // direction = link.getDirection(); |
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| 188 | properties = path.get(j); |
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| 189 | objectClasses = path.get(j-1); |
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| 190 | direction = Direction.forward; |
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| 191 | |
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| 192 | if (i==0) |
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| 193 | subjectClasses = startClass; |
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| 194 | |
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| 195 | selStr.append("?c").append(i).append(" "); |
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| 196 | selStr.append("?l").append(i).append(" "); |
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| 197 | |
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| 198 | // if(i == path.size()) |
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| 199 | // selStr.append("\n"); |
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| 200 | |
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| 201 | |
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| 202 | whereStr.append("?c").append(i). |
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| 203 | append(" rdf:type "). |
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| 204 | append("<"). |
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| 205 | append(subjectClasses). |
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| 206 | append(">"). |
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| 207 | append(".\n"); |
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| 208 | |
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| 209 | whereStr.append("OPTIONAL{\n?c"+i+" rdfs:label ?l"+i+".}\n"); |
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| 210 | |
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| 211 | |
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| 212 | if(direction == Direction.forward) |
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| 213 | { |
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| 214 | whereStr.append("?c").append(i).append(" "); |
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| 215 | whereStr.append("<").append(properties).append("> "); |
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| 216 | whereStr.append("?c").append(i+1).append(".\n"); |
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| 217 | } |
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| 218 | else |
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| 219 | { |
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| 220 | whereStr.append("?c").append(i+1).append(" "); |
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| 221 | whereStr.append("<").append(properties).append("> "); |
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| 222 | whereStr.append("?c").append(i).append(".\n"); |
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| 223 | } |
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| 224 | |
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| 225 | subjectClasses = objectClasses; |
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| 226 | i++; |
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| 227 | k++; |
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| 228 | if(k>=num){ |
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| 229 | break; |
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| 230 | } |
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| 231 | } |
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| 232 | |
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| 233 | selStr.append("?c").append(i).append(" \n"); |
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| 234 | selStr.append("?l").append(i).append(" \n"); |
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| 235 | whereStr.append("?c").append(i).append(" rdf:type "). |
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| 236 | append("<"). |
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| 237 | append(subjectClasses). |
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| 238 | append(">"). |
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| 239 | append(".\n"); |
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| 240 | whereStr.append("OPTIONAL{\n?c"+i+" rdfs:label ?l"+i+".}\n"); |
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| 241 | |
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| 242 | |
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| 243 | queryStr.append(selStr).append(whereStr); |
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| 244 | |
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| 245 | queryStr.append("}"); |
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| 246 | //OPTIONAL |
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| 247 | queryStr.append("LIMIT 100\n");; |
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| 248 | |
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| 249 | System.out.println(queryStr); |
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| 250 | return queryStr.toString(); |
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| 251 | |
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| 252 | |
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| 253 | } |
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| 254 | |
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| 255 | } |
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| 256 | |
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