feat(codegen): move meta properties and argument resolver functions into companion object

Author: WipeAir

graphql-kotlin-toolkit-codegen/src/main/kotlin/com/auritylab/graphql/kotlin/toolkit/codegen/generator/fieldResolver/AbstractFieldResolverGenerator.kt

@@ -73,8 +73,12 @@ internal abstract class AbstractFieldResolverGenerator(
             typeBuilder.addAnnotation(springBootIntegrationAnnotationSpec)
 
         // Add the common functions and types.
-        typeBuilder.addFunctions(argumentResolverFunSpecs)
-        typeBuilder.addType(metaTypeSpec)
+        typeBuilder.addType(
+            TypeSpec.companionObjectBuilder()
+                .addProperties(metaPropertySpecs)
+                .addFunctions(argumentResolverFunSpecs)
+                .build()
+        )
 
         builder.addType(typeBuilder.build())
     }
@@ -141,19 +145,15 @@ internal abstract class AbstractFieldResolverGenerator(
      * The meta type is required for the spring boot annotation, which relies on the values of the meta type.
      * As the properties of the meta type are constant they're open to use for everything.
      */
-    private val metaTypeSpec: TypeSpec =
-        TypeSpec.companionObjectBuilder("Meta")
-            .addProperty(
-                PropertySpec.builder("CONTAINER", STRING, KModifier.CONST)
-                    .initializer("\"${container.name}\"")
-                    .build()
-            )
-            .addProperty(
-                PropertySpec.builder("FIELD", STRING, KModifier.CONST)
-                    .initializer("\"${field.name}\"")
-                    .build()
-            )
-            .build()
+    private val metaPropertySpecs: List<PropertySpec> =
+        listOf(
+            PropertySpec.builder("META_CONTAINER", STRING, KModifier.CONST)
+                .initializer("\"${container.name}\"")
+                .build(),
+            PropertySpec.builder("META_FIELD", STRING, KModifier.CONST)
+                .initializer("\"${field.name}\"")
+                .build()
+        )
 
     /**
      * Will build the [FunSpec] for all arguments on the current [field]. The returned value also holds a [MemberName]

graphql-kotlin-toolkit-codegen/src/main/kotlin/com/auritylab/graphql/kotlin/toolkit/codegen/mapper/GeneratedMapper.kt

@@ -67,7 +67,7 @@ internal class GeneratedMapper(
         container: GraphQLFieldsContainer,
         field: GraphQLFieldDefinition
     ): MemberName =
-        MemberName(getGeneratedFieldResolverClassName(container, field).addSimpleNames("Meta"), "CONTAINER")
+        MemberName(getGeneratedFieldResolverClassName(container, field).addSimpleNames("Companion"), "META_CONTAINER")
 
     /**
      * Will return the [MemberName] which points to a string which contains the name of the field for the given field resolver.
@@ -76,7 +76,7 @@ internal class GeneratedMapper(
         container: GraphQLFieldsContainer,
         field: GraphQLFieldDefinition
     ): MemberName =
-        MemberName(getGeneratedFieldResolverClassName(container, field).addSimpleNames("Meta"), "FIELD")
+        MemberName(getGeneratedFieldResolverClassName(container, field).addSimpleNames("Companion"), "META_FIELD")
 
     /**
      * Will return the [ClassName] which points to the Environment class for the given resolver.