Handle empty SQL array values in DashboardDrawerRowMapper

- Return an empty list if SQL array is null.
- Check for single empty value in SQL array and return an empty list.
- Convert valid SQL arrays to Java lists properly.

src/main/java/edu/harvard/dbmi/avillach/dictionary/dashboarddrawer/DashboardDrawerRowMapper.java

@@ -25,10 +25,16 @@ public DashboardDrawer mapRow(ResultSet rs, int rowNum) throws SQLException {
     }
 
     private List<String> convertSqlArrayToList(Array sqlArray) throws SQLException {
-        if (sqlArray == null) {
+        if (sqlArray == null ) {
             return List.of();
+        } else {
+            Object[] arrayContents = (Object[]) sqlArray.getArray();
+            // Check if the array contains a single empty value
+            if (arrayContents.length == 1 && "".equals(arrayContents[0])) {
+                return List.of();
+            } else {
+                return Arrays.asList((String[]) sqlArray.getArray());
+            }
         }
-        // Convert SQL Array to Java Array, then to List
-        return Arrays.asList((String[]) sqlArray.getArray());
     }
 }