Preserve numeric keys that exceed Long range when mapping Updates.

This commit makes sure we preserve map keys no matter what.

Closes #3552.
Original pull request: #3565.

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

@@ -1261,9 +1261,9 @@ public class QueryMapper {
 
 					String partial = iterator.next();
 
-					boolean isPositional = (isPositionalParameter(partial) && (property.isMap() || property.isCollectionLike()));
+					boolean isPositional = isPositionalParameter(partial) && property.isCollectionLike();
 
-					if (isPositional) {
+					if (isPositional || property.isMap()) {
 						mappedName.append(".").append(partial);
 					}
 

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

@@ -1089,6 +1089,27 @@ class UpdateMapperUnitTests {
 		assertThat(mappedUpdate).isEqualTo(new Document("$set", new Document("aliased.$[element].value", 10)));
 	}
 
+	@Test // GH-3552
+	void numericKeyForMap() {
+
+		Update update = new Update().set("map.601218778970110001827396", "testing");
+		Document mappedUpdate = mapper.getMappedObject(update.getUpdateObject(),
+				context.getPersistentEntity(EntityWithObjectMap.class));
+
+		assertThat(mappedUpdate).isEqualTo(Document.parse("{\"$set\": {\"map.601218778970110001827396\": \"testing\"}}"));
+	}
+
+	@Test // GH-3552
+	void numericKeyInMapOfNestedPath() {
+
+		Update update = new Update().set("map.601218778970110001827396.value", "testing");
+		Document mappedUpdate = mapper.getMappedObject(update.getUpdateObject(),
+				context.getPersistentEntity(EntityWithObjectMap.class));
+
+		assertThat(mappedUpdate)
+				.isEqualTo(Document.parse("{\"$set\": {\"map.601218778970110001827396.value\": \"testing\"}}"));
+	}
+
 	static class DomainTypeWrappingConcreteyTypeHavingListOfInterfaceTypeAttributes {
 		ListModelWrapper concreteTypeWithListAttributeOfInterfaceType;
 	}