Mercurial > hg > LightPIT / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/main/java/de/uapcore/lightpit/viewmodel/util/IssueSorter.java	Fri Oct 09 15:35:48 2020 +0200
     1.3 @@ -0,0 +1,78 @@
     1.4 +package de.uapcore.lightpit.viewmodel.util;
     1.5 +
     1.6 +import de.uapcore.lightpit.entities.Issue;
     1.7 +import de.uapcore.lightpit.entities.IssueStatus;
     1.8 +
     1.9 +import java.util.Arrays;
    1.10 +import java.util.Comparator;
    1.11 +
    1.12 +public class IssueSorter implements Comparator<Issue> {
    1.13 +
    1.14 +    public enum Field {
    1.15 +        PHASE, ETA, UPDATED
    1.16 +    }
    1.17 +
    1.18 +    public static class Criteria {
    1.19 +        private Field field;
    1.20 +        private boolean asc;
    1.21 +
    1.22 +        public Criteria(Field field, boolean asc) {
    1.23 +            this.field = field;
    1.24 +            this.asc = asc;
    1.25 +        }
    1.26 +
    1.27 +        @Override
    1.28 +        public boolean equals(Object obj) {
    1.29 +            if (obj == null || !obj.getClass().equals(Criteria.class))
    1.30 +                return false;
    1.31 +            final var other = (Criteria)obj;
    1.32 +            return other.field.equals(field) && other.asc == asc;
    1.33 +        }
    1.34 +    }
    1.35 +
    1.36 +    private final Criteria[] criteria;
    1.37 +
    1.38 +    public IssueSorter(Criteria ... criteria) {
    1.39 +        this.criteria = criteria;
    1.40 +    }
    1.41 +
    1.42 +    private int compare(Issue left, Issue right, Criteria criteria) {
    1.43 +        int result;
    1.44 +        switch (criteria.field) {
    1.45 +            case PHASE:
    1.46 +                result = Boolean.compare(
    1.47 +                        left.getPhase() == IssueStatus.PHASE_DONE,
    1.48 +                        right.getPhase() == IssueStatus.PHASE_DONE);
    1.49 +                break;
    1.50 +            case ETA:
    1.51 +                if (left.getEta() != null && right.getEta() != null)
    1.52 +                    result = left.getEta().compareTo(right.getEta());
    1.53 +                else
    1.54 +                    result = left != null ? -1 : 1;
    1.55 +                break;
    1.56 +            case UPDATED:
    1.57 +                result = left.getUpdated().compareTo(right.getUpdated());
    1.58 +                break;
    1.59 +            default:
    1.60 +                throw new UnsupportedOperationException();
    1.61 +        }
    1.62 +        return criteria.asc ? result : -result;
    1.63 +    }
    1.64 +
    1.65 +    @Override
    1.66 +    public int compare(Issue left, Issue right) {
    1.67 +        for (var c : criteria) {
    1.68 +            int r = compare(left, right, c);
    1.69 +            if (r != 0) return r;
    1.70 +        }
    1.71 +        return 0;
    1.72 +    }
    1.73 +
    1.74 +    @Override
    1.75 +    public boolean equals(Object o) {
    1.76 +        if (o == null || !o.getClass().equals(IssueSorter.class))
    1.77 +            return false;
    1.78 +        final var other = (IssueSorter) o;
    1.79 +        return Arrays.equals(criteria, other.criteria);
    1.80 +    }
    1.81 +}