Fix bad utility type definitions (#37662)

Reviewed By: panagosg7

Differential Revision: D46364595

fbshipit-source-id: 5dcd484cd292d5b83b0b114675ec3c8059aefe6b

packages/react-native-codegen/src/CodegenSchema.js

@@ -134,6 +134,27 @@ export type EventTypeAnnotation =
       elementType: EventTypeAnnotation,
     }>;
 
+export type ArrayTypeAnnotation = $ReadOnly<{
+  type: 'ArrayTypeAnnotation',
+  elementType:
+    | BooleanTypeAnnotation
+    | StringTypeAnnotation
+    | DoubleTypeAnnotation
+    | FloatTypeAnnotation
+    | Int32TypeAnnotation
+    | $ReadOnly<{
+        type: 'StringEnumTypeAnnotation',
+        default: string,
+        options: $ReadOnlyArray<string>,
+      }>
+    | ObjectTypeAnnotation<PropTypeAnnotation>
+    | ReservedPropTypeAnnotation
+    | $ReadOnly<{
+        type: 'ArrayTypeAnnotation',
+        elementType: ObjectTypeAnnotation<PropTypeAnnotation>,
+      }>,
+}>;
+
 export type PropTypeAnnotation =
   | $ReadOnly<{
       type: 'BooleanTypeAnnotation',
@@ -167,26 +188,7 @@ export type PropTypeAnnotation =
     }>
   | ReservedPropTypeAnnotation
   | ObjectTypeAnnotation<PropTypeAnnotation>
-  | $ReadOnly<{
-      type: 'ArrayTypeAnnotation',
-      elementType:
-        | BooleanTypeAnnotation
-        | StringTypeAnnotation
-        | DoubleTypeAnnotation
-        | FloatTypeAnnotation
-        | Int32TypeAnnotation
-        | $ReadOnly<{
-            type: 'StringEnumTypeAnnotation',
-            default: string,
-            options: $ReadOnlyArray<string>,
-          }>
-        | ObjectTypeAnnotation<PropTypeAnnotation>
-        | ReservedPropTypeAnnotation
-        | $ReadOnly<{
-            type: 'ArrayTypeAnnotation',
-            elementType: ObjectTypeAnnotation<PropTypeAnnotation>,
-          }>,
-    }>
+  | ArrayTypeAnnotation
   | MixedTypeAnnotation;
 
 export type ReservedPropTypeAnnotation = $ReadOnly<{

packages/react-native-codegen/src/generators/components/GeneratePropsJavaPojo/PojoCollector.js

@@ -21,6 +21,7 @@ import type {
   Int32TypeAnnotation,
   PropTypeAnnotation,
   MixedTypeAnnotation,
+  ArrayTypeAnnotation,
 } from '../../../CodegenSchema';
 
 const {capitalize} = require('../../Utils');
@@ -110,11 +111,8 @@ class PojoCollector {
       }
       case 'ArrayTypeAnnotation': {
         const arrayTypeAnnotation = typeAnnotation;
-        // TODO: Flow assumes elementType can be any. Fix this.
-        const elementType: $PropertyType<
-          typeof arrayTypeAnnotation,
-          'elementType',
-        > = arrayTypeAnnotation.elementType;
+        const elementType: $PropertyType<ArrayTypeAnnotation, 'elementType'> =
+          arrayTypeAnnotation.elementType;
 
         const pojoElementType = (() => {
           switch (elementType.type) {