🐛 fix for invalid polygons returned by the server

src/main/java/com/mindee/parsing/generated/GeneratedObject.java

@@ -104,10 +104,26 @@ public Polygon getPolygon() {
    * @return A {@link Polygon}.
    */
   public Polygon getAsPolygon(String key) {
-    if (this.containsKey(key)) {
-      return PolygonUtils.getFrom((List<List<Double>>) this.get(key));
+    if (!this.containsKey(key)) {
+      return null;
     }
-    return null;
+    Object rawPolygon = this.get(key);
+    // a valid polygon must have at least 4 points
+    if (!(rawPolygon instanceof List && ((List<?>) rawPolygon).size() >= 4)) {
+      return null;
+    }
+    // a valid point must have exactly 2 coordinates
+    for (Object point : (List<?>) rawPolygon) {
+      if (!(point instanceof List) || ((List<?>) point).size() != 2) {
+        return null;
+      }
+      for (Object coord : (List<?>) point) {
+        if (!(coord instanceof Double)) {
+          return null;
+        }
+      }
+    }
+    return PolygonUtils.getFrom((List<List<Double>>) rawPolygon);
   }
 
   /**

src/test/java/com/mindee/product/generated/GeneratedV1Test.java

@@ -29,7 +29,7 @@ protected AsyncPredictResponse<GeneratedV1> getAsyncPrediction(String name) thro
         GeneratedV1.class
     );
     return objectMapper.readValue(
-        new File("src/test/resources/products/generated/response_v1/" + name + "_international_id_v1.json"),
+        new File("src/test/resources/products/generated/response_v1/" + name + ".json"),
         type
     );
   }
@@ -62,9 +62,25 @@ protected PredictResponse<GeneratedV1> getSyncPrediction(String name) throws IOE
     );
   }
 
+  @Test
+  void whenAsyncBadPolygonsDeserialized_mustHaveValidProperties() throws IOException {
+    AsyncPredictResponse<GeneratedV1> response = getAsyncPrediction("bad_polygons_driver_license_v1");
+    GeneratedV1Document docPrediction = response.getDocumentObj().getInference().getPrediction();
+
+    Map<String, GeneratedFeature> features = docPrediction.getFields();
+
+    // invalid polygon returned by the server
+    StringField categoryField = features.get("category").asStringField();
+    Assertions.assertNull(categoryField.getPolygon());
+
+    // valid polygon
+    StringField mrzField = features.get("mrz").asStringField();
+    Assertions.assertNotNull(mrzField.getPolygon());
+  }
+
   @Test
   void whenAsyncCompleteDeserialized_mustHaveValidProperties() throws IOException {
-    AsyncPredictResponse<GeneratedV1> response = getAsyncPrediction("complete");
+    AsyncPredictResponse<GeneratedV1> response = getAsyncPrediction("complete_international_id_v1");
     GeneratedV1Document docPrediction = response.getDocumentObj().getInference().getPrediction();
 
     Map<String, GeneratedFeature> features = docPrediction.getFields();
@@ -114,7 +130,7 @@ void whenAsyncCompleteDeserialized_mustHaveValidProperties() throws IOException
 
   @Test
   void whenAsyncEmptyDeserialized_mustHaveValidProperties() throws IOException {
-    AsyncPredictResponse<GeneratedV1> response = getAsyncPrediction("empty");
+    AsyncPredictResponse<GeneratedV1> response = getAsyncPrediction("empty_international_id_v1");
     GeneratedV1Document docPrediction = response.getDocumentObj().getInference().getPrediction();
 
     Map<String, GeneratedFeature> features = docPrediction.getFields();