Used contry ID derived from collection ID for deletion

src/main/java/de/samply/directory_sync_service/directory/DirectoryApi.java

@@ -147,10 +147,10 @@ public boolean updateStarModel(StarModelData starModelInputData) {
    * @return An boolean indicating the success or failure of the deletion.
    */
   protected boolean deleteStarModel(StarModelData starModelInputData) {
-    String countryCode = starModelInputData.getCountryCode();
-
     try {
       for (String collectionId: starModelInputData.getInputCollectionIds()) {
+        String countryCode = extractCountryCodeFromBbmriEricId(collectionId);
+
         // Loop until no more facts are left in the Directory.
         // We need to do things this way, because the Directory implements paging
         // and a single pass may not get all facts.
@@ -253,4 +253,20 @@ public void collectDiagnosisCorrections(Map<String, String> diagnoses) {
   }
 
   protected abstract boolean isValidIcdValue(String diagnosis);
+
+  /**
+   * Extracts the country code from a given BBMRI ID string. Works for both
+   * biobank and collection IDs.
+   *
+   * @param id The BBMRI ID string from which to extract the country code.
+   * @return The country code extracted from the BBMRI ID string.
+   */
+  protected String extractCountryCodeFromBbmriEricId(String id) {
+    BbmriEricId bbmriEricCollectionId = BbmriEricId
+            .valueOf(id)
+            .orElse(null);
+    String countryCode = bbmriEricCollectionId.getCountryCode();
+
+    return countryCode;
+  }
 }

src/main/java/de/samply/directory_sync_service/directory/graphql/DirectoryApiGraphql.java

@@ -295,22 +295,6 @@ private void deleteUnknownFieldsFromEntity(String countryCode, Map<String, Objec
       entity.remove("biobank_label");
   }
 
-  /**
-   * Extracts the country code from a given BBMRI ID string. Works for both
-   * biobank and collection IDs.
-   *
-   * @param id The BBMRI ID string from which to extract the country code.
-   * @return The country code extracted from the BBMRI ID string.
-   */
-  private String extractCountryCodeFromBbmriEricId(String id) {
-    BbmriEricId bbmriEricCollectionId = BbmriEricId
-            .valueOf(id)
-            .orElse(null);
-    String countryCode = bbmriEricCollectionId.getCountryCode();
-
-    return countryCode;
-  }
-
   /**
    * Removes keys from the given collection if the corresponding value is an empty list or a list with a single null element.
    *