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1 package de.mpiwg.itgroup.metadataManager.pid;
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2
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3
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4 import java.util.ArrayList;
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5 import java.util.Calendar;
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6 import java.util.HashMap;
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7 import java.util.Random;
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8
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9 public class PidGenerator {
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10
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11 public String getPID() {
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12
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13 HashMap<Integer, Character> driEncode = new HashMap<Integer, Character>();
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14
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15 driEncode.put(0,'0');
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16 driEncode.put(1,'1');
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17 driEncode.put(2,'2');
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18 driEncode.put(3,'3');
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19 driEncode.put(4,'4');
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20 driEncode.put(5,'5');
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21 driEncode.put(6,'6');
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22 driEncode.put(7,'7');
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23 driEncode.put(8,'8');
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24 driEncode.put(9,'9');
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25 driEncode.put(10,'A');
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26 driEncode.put(11,'B');
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27 driEncode.put(12,'C');
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28 driEncode.put(13,'D');
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29 driEncode.put(14,'E');
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30 driEncode.put(15,'F');
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31 driEncode.put(16,'G');
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32 driEncode.put(17,'H');
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33 driEncode.put(18,'K');
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34 driEncode.put(19,'M');
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35 driEncode.put(20,'N');
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36 driEncode.put(21,'P');
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37 driEncode.put(22,'Q');
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38 driEncode.put(23,'R');
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39 driEncode.put(24,'S');
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40 driEncode.put(25,'T');
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41 driEncode.put(26,'U');
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42 driEncode.put(27,'V');
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43 driEncode.put(28,'W');
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44 driEncode.put(29,'X');
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45 driEncode.put(30,'Y');
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46 driEncode.put(31,'Z');
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47
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48
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49 Random rd = new Random();
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50 long mils = Calendar.getInstance().getTimeInMillis();
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51 rd.setSeed(mils);
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52
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53 ArrayList<Integer> x = new ArrayList<Integer>();
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54
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55 for (int i=0;i<7;i++)
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56 x.add(rd.nextInt(32));
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57
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58
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59 Integer sum=0;
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60 for (int i=0;i<7;i++){
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61 sum+=(i+1)*x.get(i);
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62 }
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63
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64 Integer c=sum % 31;
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65 ArrayList<Character> id = new ArrayList<Character>();
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66 for (int i=0;i<7;i++){
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67 id.add(i, driEncode.get(x.get(i)));
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68 }
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69
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70 id.add(driEncode.get(c));
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71
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72 String ret = new String();
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73 for (Character cr: id){
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74 ret+=cr;
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75 }
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76 return new String(ret);
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77
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78 }
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79 }
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