refactor: extract TransformationType enum from executor

src/ClassTransformer.ts

@@ -1,5 +1,6 @@
 import { ClassTransformOptions } from './ClassTransformOptions';
-import { TransformOperationExecutor, TransformationType } from './TransformOperationExecutor';
+import { TransformOperationExecutor } from './TransformOperationExecutor';
+import { TransformationType } from './enums';
 
 export type ClassType<T> = {
   new (...args: any[]): T;

src/TransformOperationExecutor.ts

@@ -2,12 +2,7 @@ import { ClassTransformOptions } from './ClassTransformOptions';
 import { defaultMetadataStorage } from './storage';
 import { TypeHelpOptions, TypeOptions } from './metadata/ExposeExcludeOptions';
 import { TypeMetadata } from './metadata/TypeMetadata';
-
-export enum TransformationType {
-  PLAIN_TO_CLASS,
-  CLASS_TO_PLAIN,
-  CLASS_TO_CLASS,
-}
+import { TransformationType } from './enums';
 
 export function testForBuffer(): boolean {
   try {

src/decorators.ts

@@ -12,7 +12,7 @@ import {
 import { ExcludeMetadata } from './metadata/ExcludeMetadata';
 import { TransformMetadata } from './metadata/TransformMetadata';
 import { ClassTransformOptions } from './ClassTransformOptions';
-import { TransformationType } from './TransformOperationExecutor';
+import { TransformationType } from './enums';
 
 /**
  * Defines a custom logic for value transformation.

src/enums/index.ts

@@ -0,0 +1 @@
+export * from './transformation-type.enum';

src/enums/transformation-type.enum.ts

@@ -0,0 +1,5 @@
+export enum TransformationType {
+  PLAIN_TO_CLASS,
+  CLASS_TO_PLAIN,
+  CLASS_TO_CLASS,
+}

src/metadata/MetadataStorage.ts

@@ -1,8 +1,8 @@
 import { TypeMetadata } from './TypeMetadata';
 import { ExposeMetadata } from './ExposeMetadata';
 import { ExcludeMetadata } from './ExcludeMetadata';
-import { TransformationType } from '../TransformOperationExecutor';
 import { TransformMetadata } from './TransformMetadata';
+import { TransformationType } from '../enums';
 
 /**
  * Storage all library metadata.

src/metadata/TransformMetadata.ts

@@ -1,5 +1,5 @@
 import { TransformOptions } from './ExposeExcludeOptions';
-import { TransformationType } from '../TransformOperationExecutor';
+import { TransformationType } from '../enums';
 
 export class TransformMetadata {
   constructor(

test/functional/custom-transform.spec.ts

@@ -3,7 +3,7 @@ import 'reflect-metadata';
 import { classToClass, classToPlain, plainToClass } from '../../src/index';
 import { defaultMetadataStorage } from '../../src/storage';
 import { Expose, Transform, Type } from '../../src/decorators';
-import { TransformationType } from '../../src/TransformOperationExecutor';
+import { TransformationType } from '../../src/enums';
 import dayjs from 'dayjs';
 
 describe('custom transformation decorator', () => {