--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/de/uapcore/lightpit/viewmodel/util/IssueSorter.java Fri Oct 09 15:35:48 2020 +0200
@@ -0,0 +1,78 @@
+package de.uapcore.lightpit.viewmodel.util;
+
+import de.uapcore.lightpit.entities.Issue;
+import de.uapcore.lightpit.entities.IssueStatus;
+
+import java.util.Arrays;
+import java.util.Comparator;
+
+public class IssueSorter implements Comparator<Issue> {
+
+ public enum Field {
+ PHASE, ETA, UPDATED
+ }
+
+ public static class Criteria {
+ private Field field;
+ private boolean asc;
+
+ public Criteria(Field field, boolean asc) {
+ this.field = field;
+ this.asc = asc;
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (obj == null || !obj.getClass().equals(Criteria.class))
+ return false;
+ final var other = (Criteria)obj;
+ return other.field.equals(field) && other.asc == asc;
+ }
+ }
+
+ private final Criteria[] criteria;
+
+ public IssueSorter(Criteria ... criteria) {
+ this.criteria = criteria;
+ }
+
+ private int compare(Issue left, Issue right, Criteria criteria) {
+ int result;
+ switch (criteria.field) {
+ case PHASE:
+ result = Boolean.compare(
+ left.getPhase() == IssueStatus.PHASE_DONE,
+ right.getPhase() == IssueStatus.PHASE_DONE);
+ break;
+ case ETA:
+ if (left.getEta() != null && right.getEta() != null)
+ result = left.getEta().compareTo(right.getEta());
+ else
+ result = left != null ? -1 : 1;
+ break;
+ case UPDATED:
+ result = left.getUpdated().compareTo(right.getUpdated());
+ break;
+ default:
+ throw new UnsupportedOperationException();
+ }
+ return criteria.asc ? result : -result;
+ }
+
+ @Override
+ public int compare(Issue left, Issue right) {
+ for (var c : criteria) {
+ int r = compare(left, right, c);
+ if (r != 0) return r;
+ }
+ return 0;
+ }
+
+ @Override
+ public boolean equals(Object o) {
+ if (o == null || !o.getClass().equals(IssueSorter.class))
+ return false;
+ final var other = (IssueSorter) o;
+ return Arrays.equals(criteria, other.criteria);
+ }
+}