Revert ArgumentValue->FieldValue changes

See gh-1187
See gh-1190
See gh-1174

Author: bclozel

spring-graphql-docs/modules/ROOT/pages/client.adoc

@@ -393,47 +393,6 @@ include-code::UseInterceptor[tag=register,indent=0]
 
 
 
-[[client.fieldvalue]]
-== `FieldValue`
-
-By default, input types in GraphQL are nullable and optional, an input value (or any of its fields)
-can be set to the `null` literal, or not provided at all. This distinction is useful for
-partial updates with a mutation where the underlying data may also be, either set to
-`null` or not changed at all accordingly.
-
-Similar to the xref:controllers.adoc#controllers.schema-mapping.fieldvalue[`FieldValue<T> support in controllers`],
-we can wrap an Input type with `FieldValue<T>` or use it at the level of class attributes on the client side.
-Given a `ProjectInput` class like:
-
-include-code::ProjectInput[indent=0]
-
-We can use our client to send a mutation request:
-
-include-code::FieldValueClient[tag=fieldvalue,indent=0]
-
-For this to work, the client must use Jackson for JSON (de)serialization and must be configured
-with the `org.springframework.graphql.client.json.GraphQlModule`.
-This can be registered manually on the underlying HTTP client like so:
-
-include-code::FieldValueClient[tag=createclient,indent=0]
-
-This `GraphQlModule` can be globally registered in Spring Boot applications by contributing it as a bean:
-
-[source,java,indent=0,subs="verbatim,quotes"]
-----
-    @Configuration
-    public class GraphQlJsonConfiguration {
-
-    	@Bean
-    	public GraphQLModule graphQLModule() {
-    		return new GraphQLModule();
-    	}
-
-    }
-----
-
-
-
 [[client.dgsgraphqlclient]]
 == DGS Codegen
 

spring-graphql-docs/modules/ROOT/pages/controllers.adoc

@@ -143,11 +143,11 @@ See xref:controllers.adoc#controllers.schema-mapping.argument[`@Argument`].
 
 See xref:controllers.adoc#controllers.schema-mapping.argument[`@Argument`].
 
-| `FieldValue`
+| `ArgumentValue`
 | For access to a named field argument bound to a higher-level, typed Object along
 with a flag to indicate if the input argument was omitted vs set to `null`.
 
-See xref:controllers.adoc#controllers.schema-mapping.field-value[`FieldValue`].
+See xref:controllers.adoc#controllers.schema-mapping.argument-value[`ArgumentValue`].
 
 | `@Arguments`
 | For access to all field arguments bound to a higher-level, typed Object.
@@ -403,8 +403,8 @@ specified in the annotation, or to the parameter name. For access to the full ar
 map, please use xref:controllers.adoc#controllers.schema-mapping.arguments[`@Arguments`] instead.
 
 
-[[controllers.schema-mapping.fieldvalue]]
-=== `FieldValue`
+[[controllers.schema-mapping.argument-value]]
+=== `ArgumentValue`
 
 By default, input arguments in GraphQL are nullable and optional, which means an argument
 can be set to the `null` literal, or not provided at all. This distinction is useful for
@@ -414,7 +414,7 @@ there is no way to make such a distinction, because you would get `null` or an e
 `Optional` in both cases.
 
 If you want to know not whether a value was not provided at all, you can declare an
-`FieldValue` method parameter, which is a simple container for the resulting value,
+`ArgumentValue` method parameter, which is a simple container for the resulting value,
 along with a flag to indicate whether the input argument was omitted altogether. You
 can use this instead of `@Argument`, in which case the argument name is determined from
 the method parameter name, or together with `@Argument` to specify the argument name.
@@ -426,31 +426,20 @@ For example:
 	@Controller
 	public class BookController {
 
-		@QueryMapping
-		public List<Book> searchBook(@Argument String search, FieldValue<Genre> genre) {
-			if (!genre.isOmitted()) {
-				// genre has been set but might hold a "null" value
-				Genre genreValue = genre.value();
-			}
-		}
-
 		@MutationMapping
-		public void addBook(@Argument BookInput bookInput) {
-            FieldValue<String> genre = bookInput.genre();
-            genre.ifPresent(genre -> {
-                //...
-            });
+		public void addBook(ArgumentValue<BookInput> bookInput) {
+			if (!bookInput.isOmitted()) {
+				BookInput value = bookInput.value();
+				// ...
+			}
 		}
 	}
 ----
 
-`FieldValue` is also supported as a field within the object structure of an `@Argument`
+`ArgumentValue` is also supported as a field within the object structure of an `@Argument`
 method parameter, either initialized via a constructor argument or via a setter, including
 as a field of an object nested at any level below the top level object.
 
-This is also supported on the client side with a dedicated Jackson Module,
-see the xref:client.adoc#client.fieldvalue[`FieldValue` support for clients] section.
-
 
 [[controllers.schema-mapping.arguments]]
 === `@Arguments`