fix sorting in ExercisePanel and AnnotationsTableModel where the colu…

…mns were sorted incorrectly and fix path display on windows

src/main/java/edu/kit/kastel/sdq/intelligrade/extensions/guis/AnnotationsTableModel.java

@@ -9,6 +9,7 @@
 
 import com.intellij.DynamicBundle;
 import edu.kit.kastel.sdq.artemis4j.grading.Annotation;
+import org.jetbrains.annotations.NotNull;
 
 /**
  * The table model for the annotations table.
@@ -58,8 +59,11 @@ public Object getValueAt(int row, int column) {
                     .getMistakeType()
                     .getButtonText()
                     .translateTo(LOCALE);
-            case LINES_COLUMN -> formatLines(annotation);
-            case FILE_COLUMN -> annotation.getFilePath();
+            case LINES_COLUMN -> LineLocation.fromAnnotation(annotation);
+            case FILE_COLUMN -> annotation
+                    .getFilePath()
+                    // for display purposes, replace backslashes with forward slashes
+                    .replace("\\", "/");
             case SOURCE_COLUMN -> annotation.getSource();
             case CUSTOM_MESSAGE_COLUMN -> annotation.getCustomMessage().orElse("");
             case CUSTOM_PENALTY_COLUMN -> annotation
@@ -85,14 +89,39 @@ public Annotation get(int index) {
         return annotations.get(index);
     }
 
-    private String formatLines(Annotation annotation) {
-        int startLine = annotation.getStartLine() + 1;
-        int endLine = annotation.getEndLine() + 1;
-
-        if (startLine == endLine) {
-            return String.valueOf(startLine);
+    @Override
+    public Class<?> getColumnClass(int columnIndex) {
+        // This must be overridden, otherwise LineLocation#compareTo will not be called.
+        if (columnIndex == LINES_COLUMN) {
+            return LineLocation.class;
         } else {
-            return String.format("%d - %d", startLine, endLine);
+            return Object.class;
+        }
+    }
+
+    public record LineLocation(int startLine, int endLine) implements Comparable<LineLocation> {
+        public static LineLocation fromAnnotation(Annotation annotation) {
+            return new LineLocation(annotation.getStartLine() + 1, annotation.getEndLine() + 1);
+        }
+
+        @Override
+        public String toString() {
+            return startLine == endLine ? "%d".formatted(startLine) : "%d - %s".formatted(startLine, endLine);
+        }
+
+        @Override
+        public int compareTo(@NotNull LineLocation other) {
+            // It is not necessary to override equals and hashCode, because
+            // this is already done by the record keyword.
+            if (this.equals(other)) {
+                return 0;
+            }
+
+            if (startLine != other.startLine) {
+                return Integer.compare(startLine, other.startLine);
+            }
+
+            return Integer.compare(endLine, other.endLine);
         }
     }
 }

src/main/java/edu/kit/kastel/sdq/intelligrade/extensions/guis/ExercisePanel.java

@@ -2,6 +2,7 @@
 package edu.kit.kastel.sdq.intelligrade.extensions.guis;
 
 import java.awt.event.ItemEvent;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.function.Predicate;
 
@@ -245,13 +246,13 @@ private void handleExamSelected(ItemEvent e) {
             var item = (OptionalExam) e.getItem();
             if (item.exam() != null) {
                 for (var group : item.exam().getExerciseGroups()) {
-                    for (var exercise : group.getProgrammingExercises()) {
+                    for (var exercise : sortExercises(group.getProgrammingExercises())) {
                         exerciseSelector.addItem(exercise);
                     }
                 }
             } else {
                 for (ProgrammingExercise programmingExercise :
-                        courseSelector.getItem().getProgrammingExercises()) {
+                        sortExercises(courseSelector.getItem().getProgrammingExercises())) {
                     exerciseSelector.addItem(programmingExercise);
                 }
             }
@@ -263,6 +264,14 @@ private void handleExamSelected(ItemEvent e) {
         updateUI();
     }
 
+    private static <T extends ProgrammingExercise> List<T> sortExercises(List<T> exercises) {
+        List<T> result = new ArrayList<>(exercises);
+
+        result.sort((a, b) -> CharSequence.compare(a.getTitle(), b.getTitle()));
+
+        return result;
+    }
+
     private void handleCourseSelected(ItemEvent e) {
         // Course was selected: Update the exam selector with the exams of the course
         // This triggers an item event in the exam selector, which updates the exercise selector