Fixes it but needs a better concept

Author: christophstrobl

Diff for: spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/QueryMapper.java

@@ -1470,11 +1470,15 @@ protected String mapPropertyName(MongoPersistentProperty property) {
 					return mappedName.toString();
 				}
 
-				String nextToken = nextToken();
-				if (isPositionalParameter(nextToken)) {
-
-					mappedName.append(".").append(nextToken);
-					currentIndex += 2;
+				int i = 1;
+				String nextToken = pathParts.get(currentIndex + i);
+				if(isPositionalParameter(nextToken)) {
+					while (isPositionalParameter(nextToken)) {
+						mappedName.append(".").append(nextToken);
+						i++;
+						nextToken = currentIndex + i < pathParts.size() ?  pathParts.get(currentIndex + i) : "";
+					}
+					currentIndex += i;
 					return mappedName.toString();
 				}
 

Diff for: spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/convert/UpdateMapperUnitTests.java

@@ -1350,6 +1350,17 @@ void updateConsidersValueConverterWhenPresent() {
 		assertThat(mappedUpdate).isEqualTo("{ $set : { 'text' : 'eulav' } }");
 	}
 
+	@ParameterizedTest // GH-4502
+	@ValueSource(strings = {"levelOne.levelTwo.1", "levelOne.levelTwo.1.0", "levelOne.levelTwo.2.0",})
+	void objectNestedIntegerFieldCorrectly(String path) {
+
+		Update update = new Update().set(path, "4");
+		Document mappedUpdate = mapper.getMappedObject(update.getUpdateObject(),
+				context.getPersistentEntity(EntityWithNestedObject1.class));
+
+		assertThat(mappedUpdate).isEqualTo(new org.bson.Document("$set", new org.bson.Document(path, "4")));
+	}
+
 	static class DomainTypeWrappingConcreteyTypeHavingListOfInterfaceTypeAttributes {
 		ListModelWrapper concreteTypeWithListAttributeOfInterfaceType;
 	}
@@ -1818,4 +1829,12 @@ static class WithPropertyValueConverter {
 		@ValueConverter(ReversingValueConverter.class)
 		String text;
 	}
+
+	static class EntityWithNestedObject1 {
+		EntityWithNestedObject2 levelOne;
+	}
+
+	static class EntityWithNestedObject2 {
+		Integer levelTwo;
+	}
 }