1 package de.uapcore.lightpit.viewmodel.util; |
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2 |
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3 import de.uapcore.lightpit.entities.Issue; |
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4 import de.uapcore.lightpit.types.IssueStatusPhase; |
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5 |
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6 import java.util.Arrays; |
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7 import java.util.Comparator; |
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8 |
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9 public class IssueSorter implements Comparator<Issue> { |
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10 |
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11 public enum Field { |
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12 DONE, ETA, UPDATED |
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13 } |
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14 |
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15 public static class Criteria { |
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16 private Field field; |
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17 private boolean asc; |
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18 |
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19 public Criteria(Field field, boolean asc) { |
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20 this.field = field; |
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21 this.asc = asc; |
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22 } |
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23 |
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24 @Override |
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25 public boolean equals(Object obj) { |
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26 if (obj == null || !obj.getClass().equals(Criteria.class)) |
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27 return false; |
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28 final var other = (Criteria)obj; |
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29 return other.field.equals(field) && other.asc == asc; |
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30 } |
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31 } |
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32 |
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33 private final Criteria[] criteria; |
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34 |
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35 public IssueSorter(Criteria ... criteria) { |
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36 this.criteria = criteria; |
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37 } |
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38 |
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39 private int compare(Issue left, Issue right, Criteria criteria) { |
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40 if (left.equals(right)) |
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41 return 0; |
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42 |
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43 int result; |
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44 switch (criteria.field) { |
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45 case DONE: |
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46 result = Boolean.compare( |
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47 left.getStatus().getPhase().equals(IssueStatusPhase.Companion.getDone()), |
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48 right.getStatus().getPhase().equals(IssueStatusPhase.Companion.getDone())); |
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49 break; |
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50 case ETA: |
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51 if (left.getEta() != null && right.getEta() != null) |
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52 result = left.getEta().compareTo(right.getEta()); |
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53 else if (left.getEta() == null && right.getEta() == null) |
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54 result = 0; |
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55 else |
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56 result = left.getEta() != null ? -1 : 1; |
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57 break; |
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58 case UPDATED: |
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59 result = left.getUpdated().compareTo(right.getUpdated()); |
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60 break; |
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61 default: |
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62 throw new UnsupportedOperationException(); |
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63 } |
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64 return criteria.asc ? result : -result; |
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65 } |
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66 |
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67 @Override |
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68 public int compare(Issue left, Issue right) { |
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69 for (var c : criteria) { |
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70 int r = compare(left, right, c); |
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71 if (r != 0) return r; |
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72 } |
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73 return 0; |
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74 } |
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75 |
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76 @Override |
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77 public boolean equals(Object o) { |
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78 if (o == null || !o.getClass().equals(IssueSorter.class)) |
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79 return false; |
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80 final var other = (IssueSorter) o; |
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81 return Arrays.equals(criteria, other.criteria); |
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82 } |
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83 } |
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