diff --git a/src/ts/@overflow/commons/core/reflect/accessible_object.ts b/src/ts/@overflow/commons/core/reflect/accessible_object.ts
new file mode 100644
index 0000000..81c609d
--- /dev/null
+++ b/src/ts/@overflow/commons/core/reflect/accessible_object.ts
@@ -0,0 +1,41 @@
+import {
+  ClassType,
+} from '@overflow/commons/core/type';
+
+import {
+  AnnotatedElement,
+  Annotation,
+ } from '@overflow/commons/core/reflect';
+
+export abstract class AccessibleObject implements AnnotatedElement {
+  private _annotations: Map<any, Annotation>;
+
+  protected constructor() {
+    this._annotations = new Map();
+  }
+
+  public _addAnnotation<AnnotationType extends Annotation>(annotation: AnnotationType): void {
+    this._annotations.set((<any>annotation).prototype, annotation);
+  }
+
+  public isAnnotationPresent<AnnotationType extends Annotation>(annotationClass: ClassType<AnnotationType>): boolean {
+    return null !== this.getAnnotation(annotationClass);
+  }
+
+  public getOwnAnnotation<AnnotationType extends Annotation>(annotationClass: ClassType<AnnotationType>): AnnotationType {
+    return <AnnotationType>this._annotations.get(annotationClass.prototype);
+  }
+
+  public getOwnAnnotations(): Map<any, Annotation> {
+    return this._annotations;
+  }
+
+  public getAnnotation<AnnotationType extends Annotation>(annotationClass: ClassType<AnnotationType>): AnnotationType {
+    return this.getOwnAnnotation(annotationClass);
+  }
+
+  public getAnnotations(): Map<any, Annotation> {
+    return this.getOwnAnnotations();
+  }
+
+}
diff --git a/src/ts/@overflow/commons/core/reflect/annotated_element.ts b/src/ts/@overflow/commons/core/reflect/annotated_element.ts
new file mode 100644
index 0000000..7c8cb1d
--- /dev/null
+++ b/src/ts/@overflow/commons/core/reflect/annotated_element.ts
@@ -0,0 +1,17 @@
+import {
+  ClassType,
+} from '@overflow/commons/core/type';
+
+import {
+  Annotation,
+} from '@overflow/commons/core/reflect';
+
+export interface AnnotatedElement {
+  _addAnnotation<AnnotationType extends Annotation>(annotation: AnnotationType): void;
+
+  isAnnotationPresent<AnnotationType extends Annotation>(annotationClass: ClassType<AnnotationType>): boolean;
+  getOwnAnnotation<AnnotationType extends Annotation>(annotationClass: ClassType<AnnotationType>): AnnotationType;
+  getOwnAnnotations(): Map<any, Annotation>;
+  getAnnotation<AnnotationType extends Annotation>(annotationClass: ClassType<AnnotationType>): AnnotationType;
+  getAnnotations(): Map<any, Annotation>;
+}
diff --git a/src/ts/@overflow/commons/decorator/annotation/annotation.ts b/src/ts/@overflow/commons/core/reflect/annotation.ts
similarity index 84%
rename from src/ts/@overflow/commons/decorator/annotation/annotation.ts
rename to src/ts/@overflow/commons/core/reflect/annotation.ts
index 956f9a1..43b1c87 100644
--- a/src/ts/@overflow/commons/decorator/annotation/annotation.ts
+++ b/src/ts/@overflow/commons/core/reflect/annotation.ts
@@ -4,15 +4,9 @@ import {
 } from '@overflow/commons/core/type';
 
 export interface Annotation {
-  metadataKey(): MetadataKeyType;
   classDecorator?<TFunction extends Function>(target: TFunction): TFunction | void;
   propertyDecorator?(target: Object, propertyKey: PropertyKeyType): void;
   methodDecorator?<T>(target: Object, propertyKey: PropertyKeyType,
                       descriptor: TypedPropertyDescriptor<T>): TypedPropertyDescriptor<T> | void;
   parameterDecorator?(target: Object, propertyKey: PropertyKeyType, parameterIndex: number): void;
 }
-
-export abstract class Annotation {
-}
-
-export default Annotation;
diff --git a/src/ts/@overflow/commons/core/reflect/class.ts b/src/ts/@overflow/commons/core/reflect/class.ts
new file mode 100644
index 0000000..cc32232
--- /dev/null
+++ b/src/ts/@overflow/commons/core/reflect/class.ts
@@ -0,0 +1,112 @@
+import {
+  ClassType,
+  PropertyKeyType,
+  Metadata,
+} from '@overflow/commons/core/type';
+
+import {
+  AccessibleObject,
+  Field,
+  Method,
+} from '@overflow/commons/core/reflect';
+
+export class Class extends AccessibleObject {
+  private _clazzType: ClassType;
+  private _fields: Map<PropertyKeyType, Field>;
+  private _methods: Map<PropertyKeyType, Method>;
+
+  /**
+   * forClass
+   */
+  public static forClass(clazzType: ClassType): Class {
+    return Metadata.get(LOAFER_CLASS, clazzType);
+  }
+
+  /**
+   * _defineClass
+   */
+  public static _defineClass(clazzType: ClassType): Class {
+    let clazz: Class = Metadata.get(LOAFER_CLASS, clazzType);
+    if (undefined === clazz) {
+      clazz = new Class(clazzType);
+      Metadata.set(LOAFER_CLASS, clazz, clazzType);
+    }
+
+    return clazz;
+  }
+
+  private constructor(clazzType: ClassType) {
+    super();
+    this._clazzType = clazzType;
+    this._fields = new Map();
+    this._methods = new Map();
+  }
+
+  /**
+   * _defineField
+   */
+  public _defineField(propertyKey: PropertyKeyType, propertyType: any): Field {
+    let field: Field = this._fields.get(propertyKey);
+    if (undefined === field) {
+      field = new Field(this, propertyKey, propertyType);
+      this._fields.set(propertyKey, field);
+    }
+    return field;
+  }
+
+  /**
+   * _defineMethod
+   */
+  public _defineMethod(propertyKey: PropertyKeyType, parameterTypes: any[], returnType: any): Method {
+    let method: Method = this._methods.get(propertyKey);
+    if (undefined === method) {
+      method = new Method(this, propertyKey, parameterTypes, returnType);
+      this._methods.set(propertyKey, method);
+    }
+    return method;
+  }
+
+
+  public getOwnField(propertyKey: PropertyKeyType): Field {
+    return this._fields.get(propertyKey);
+  }
+
+  public getOwnFields(): Map<PropertyKeyType, Field> {
+    return this._fields;
+  }
+
+  public getField(propertyKey: PropertyKeyType): Field {
+    return null;
+  }
+
+  public getFields(): Field[] {
+    return null;
+  }
+
+  public getOwnMethod(propertyKey: PropertyKeyType): Method {
+    return this._methods.get(propertyKey);
+  }
+
+  public getOwnMethods(): Map<PropertyKeyType, Method> {
+    return this._methods;
+  }
+
+  public getMethod(propertyKey: PropertyKeyType): Method {
+    return null;
+  }
+
+  public getMethods(): Method[] {
+    return null;
+  }
+
+  public getName(): string {
+    return null;
+  }
+}
+
+/**
+ * Metadata key
+ * @private
+ * @type {string}
+ */
+const LOAFER_CLASS = Symbol('loafer:class');
diff --git a/src/ts/@overflow/commons/core/reflect/constructor.ts b/src/ts/@overflow/commons/core/reflect/constructor.ts
new file mode 100644
index 0000000..3891078
--- /dev/null
+++ b/src/ts/@overflow/commons/core/reflect/constructor.ts
@@ -0,0 +1,19 @@
+import {
+  PropertyKeyType,
+} from '@overflow/commons/core/type';
+
+import {
+  Class,
+  Executable,
+ } from '@overflow/commons/core/reflect';
+
+export class Constructor extends Executable {
+
+  public constructor(declaringClazz: Class, parameterTypes: any[]) {
+    super(declaringClazz, parameterTypes);
+  }
+
+  public getName(): PropertyKeyType {
+    return this.getDeclaringClass().getName();
+  }
+}
diff --git a/src/ts/@overflow/commons/core/reflect/executable.ts b/src/ts/@overflow/commons/core/reflect/executable.ts
new file mode 100644
index 0000000..74c582f
--- /dev/null
+++ b/src/ts/@overflow/commons/core/reflect/executable.ts
@@ -0,0 +1,64 @@
+import {
+  PropertyKeyType,
+} from '@overflow/commons/core/type';
+
+import {
+  AccessibleObject,
+  Class,
+  Member,
+  Parameter,
+ } from '@overflow/commons/core/reflect';
+
+export abstract class Executable extends AccessibleObject implements Member {
+  private _clazz: Class;
+  private _parameters: Parameter[];
+
+  protected constructor(declaringClazz: Class, parameterTypes: any[]) {
+    super();
+
+    this._clazz = declaringClazz;
+
+    if (null === parameterTypes) {
+      return;
+    }
+    this._parameters = [];
+    for (let i = 0; i < parameterTypes.length; i++) {
+      const parameterType = parameterTypes[i];
+      let parameter: Parameter = new Parameter(this, parameterType, i);
+      this._parameters.push(parameter);
+    }
+  }
+
+  public getDeclaringClass(): Class {
+    return this._clazz;
+  }
+
+  public abstract getName(): PropertyKeyType;
+  /**
+   * getParameterCount
+   */
+  public getParameterCount(): number {
+    if (null === this._parameters) {
+      return 0;
+    }
+    return this._parameters.length;
+  }
+  /**
+   * getParameters
+   */
+  public getParameters(): Parameter[] {
+    return this._parameters;
+  }
+  /**
+   * getParameter
+   */
+  public getParameter(index: number): Parameter {
+    if (null === this._parameters) {
+      return null;
+    }
+    if (0 > index || this._parameters.length <= index) {
+      return null;
+    }
+    return this._parameters[index];
+  }
+}
diff --git a/src/ts/@overflow/commons/core/reflect/field.ts b/src/ts/@overflow/commons/core/reflect/field.ts
new file mode 100644
index 0000000..af6687a
--- /dev/null
+++ b/src/ts/@overflow/commons/core/reflect/field.ts
@@ -0,0 +1,35 @@
+import {
+  PropertyKeyType,
+} from '@overflow/commons/core/type';
+
+import {
+  AccessibleObject,
+  Class,
+  Member,
+ } from '@overflow/commons/core/reflect';
+
+export class Field extends AccessibleObject implements Member {
+  private _clazz: Class;
+  private _name: PropertyKeyType;
+  private _type: any;
+
+  public constructor(declaringClazz: Class, name: PropertyKeyType, fieldType: any) {
+    super();
+    this._clazz = declaringClazz;
+    this._name = name;
+    this._type = fieldType;
+  }
+
+  public getDeclaringClass(): Class {
+    return this._clazz;
+  }
+
+  public getName(): PropertyKeyType {
+    return this._name;
+  }
+
+  public getType(): any {
+    return this._type;
+  }
+
+}
diff --git a/src/ts/@overflow/commons/core/reflect/index.ts b/src/ts/@overflow/commons/core/reflect/index.ts
new file mode 100644
index 0000000..550ae60
--- /dev/null
+++ b/src/ts/@overflow/commons/core/reflect/index.ts
@@ -0,0 +1,10 @@
+export * from './accessible_object';
+export * from './annotated_element';
+export * from './annotation';
+export * from './class';
+export * from './constructor';
+export * from './executable';
+export * from './field';
+export * from './member';
+export * from './method';
+export * from './parameter';
diff --git a/src/ts/@overflow/commons/core/reflect/member.ts b/src/ts/@overflow/commons/core/reflect/member.ts
new file mode 100644
index 0000000..055a61a
--- /dev/null
+++ b/src/ts/@overflow/commons/core/reflect/member.ts
@@ -0,0 +1,12 @@
+import {
+  Class,
+} from '@overflow/commons/core/reflect';
+
+import {
+  PropertyKeyType,
+} from '@overflow/commons/core/type';
+
+export interface Member {
+  getDeclaringClass(): Class;
+  getName(): PropertyKeyType;
+}
diff --git a/src/ts/@overflow/commons/core/reflect/method.ts b/src/ts/@overflow/commons/core/reflect/method.ts
new file mode 100644
index 0000000..c1ca432
--- /dev/null
+++ b/src/ts/@overflow/commons/core/reflect/method.ts
@@ -0,0 +1,27 @@
+import {
+  PropertyKeyType,
+} from '@overflow/commons/core/type';
+
+import {
+  Class,
+  Executable,
+ } from '@overflow/commons/core/reflect';
+
+export class Method extends Executable {
+  private _name: PropertyKeyType;
+  private _returnType: any;
+
+  public constructor(declaringClazz: Class, name: PropertyKeyType, parameterTypes: any[], returnType: any) {
+    super(declaringClazz, parameterTypes);
+    this._name = name;
+    this._returnType = returnType;
+  }
+
+  public getName(): PropertyKeyType {
+    return this._name;
+  }
+
+  public getReturnType(): any {
+    return this._returnType;
+  }
+}
diff --git a/src/ts/@overflow/commons/core/reflect/parameter.ts b/src/ts/@overflow/commons/core/reflect/parameter.ts
new file mode 100644
index 0000000..6d8d02d
--- /dev/null
+++ b/src/ts/@overflow/commons/core/reflect/parameter.ts
@@ -0,0 +1,29 @@
+import {
+  AccessibleObject,
+  Executable,
+} from '@overflow/commons/core/reflect';
+
+export class Parameter extends AccessibleObject {
+  private _executable: Executable;
+  private _type: any;
+  private _index: number;
+
+  public constructor(executable: Executable, parameterType: any, index: number) {
+    super();
+    this._executable = executable;
+    this._type = parameterType;
+    this._index = index;
+  }
+
+  public getDeclaringExecutable(): Executable {
+    return this._executable;
+  }
+
+  public getType(): any {
+    return this._type;
+  }
+
+  public getIndex(): number {
+    return this._index;
+  }
+}
diff --git a/src/ts/@overflow/commons/core/type/type.ts b/src/ts/@overflow/commons/core/type/type.ts
index d26e3e0..2260719 100644
--- a/src/ts/@overflow/commons/core/type/type.ts
+++ b/src/ts/@overflow/commons/core/type/type.ts
@@ -2,8 +2,8 @@ export type IdentityType<T> = T | symbol;
 export type PropertyKeyType = IdentityType<string>;
 export type MetadataKeyType = IdentityType<string>;
 
-export const ConstructorType = Function;
-export interface ConstructorType<T = {}> extends Function {
+export const ClassType = Function;
+export interface ClassType<T = {}> extends Function {
   new (...args: any[]): T;
 }
 
diff --git a/src/ts/@overflow/commons/core/type/util.ts b/src/ts/@overflow/commons/core/type/util.ts
index 4401412..9020cd9 100644
--- a/src/ts/@overflow/commons/core/type/util.ts
+++ b/src/ts/@overflow/commons/core/type/util.ts
@@ -1,5 +1,5 @@
 import {
-  ConstructorType,
+  ClassType,
   DecoratorType,
   DecoratorParametersType,
   PrimitiveType,
@@ -12,7 +12,7 @@ export class TypeUtil {
    * Get the provide constructor.
    * @param targetClass
    */
-  public static getContructor(targetClass: any): ConstructorType {
+  public static getContructor(targetClass: any): ClassType {
     return typeof targetClass === 'function'
         ? targetClass
         : targetClass.constructor;
@@ -23,7 +23,7 @@ export class TypeUtil {
    * @param target
    * @returns {*}
    */
-  public static getClass(target: any): any {
+  public static getClass(target: any): ClassType {
       return target.prototype ? target : target.constructor;
   }
 
diff --git a/src/ts/@overflow/commons/decorator/annotation/index.ts b/src/ts/@overflow/commons/decorator/annotation/index.ts
deleted file mode 100644
index acd091e..0000000
--- a/src/ts/@overflow/commons/decorator/annotation/index.ts
+++ /dev/null
@@ -1 +0,0 @@
-export * from './annotation';
diff --git a/src/ts/@overflow/commons/decorator/decorator.ts b/src/ts/@overflow/commons/decorator/decorator.ts
index 3e2ad7b..d436f42 100644
--- a/src/ts/@overflow/commons/decorator/decorator.ts
+++ b/src/ts/@overflow/commons/decorator/decorator.ts
@@ -1,5 +1,13 @@
 import {
-  ConstructorType,
+  Annotation,
+  Class,
+  Field,
+  Method,
+  Parameter,
+} from '@overflow/commons/core/reflect';
+
+import {
+  ClassType,
   DecoratorType,
   MetadataKeyType,
   Metadata,
@@ -7,12 +15,10 @@ import {
 } from '@overflow/commons/core/type';
 
 import * as Constants from './constants';
-import {
-  Annotation,
-} from './annotation';
+
 
 export class Decorator {
-  public static create = (AnnotationClass: ConstructorType<Annotation>) => {
+  public static create = (AnnotationClass: ClassType<Annotation>) => {
 
     return (...handlerArgs: any[]) => {
       let annotation: Annotation = new AnnotationClass(...handlerArgs);
@@ -23,13 +29,10 @@ export class Decorator {
 
         const [target, propertyKey, descriptorOrParameterIndex] = decoratorArgs;
 
-        // let type = typeof decoratorArgs[0] === 'function' ? decoratorArgs[0].prototype : decoratorArgs[0];
-        // let clazz = TypeUtil.getClass(decoratorArgs[0]);
-        if (typeof(annotation.metadataKey) === 'undefined') {
-          throw new Error(`Annotation[@${name}] must be implements metadataKey().`);
-        }
-        let metadataKey: MetadataKeyType = annotation.metadataKey.call(annotation);
-        Metadata.set(metadataKey, annotation, target, propertyKey);
+        let clazz: Class = Class._defineClass(TypeUtil.getClass(target));
+        let field: Field = null;
+        let method: Method = null;
+        let parameter: Parameter = null;
 
         switch(decoratorType) {
         case DecoratorType.CLASS:
@@ -37,24 +40,40 @@ export class Decorator {
             throw new Error(`Cannot apply @${name} decorator on Class.`);
           }
 
+          clazz._addAnnotation(annotation);
+
           return annotation.classDecorator.call(annotation, target);
         case DecoratorType.PROPERTY:
           if (typeof(annotation.propertyDecorator) === 'undefined') {
             throw new Error(`Cannot apply @${name} decorator on Property.`);
           }
 
+          field = clazz._defineField(propertyKey, Metadata.getOwnType(target, propertyKey));
+          field._addAnnotation(annotation);
+
           return annotation.propertyDecorator.call(annotation, target, propertyKey);
         case DecoratorType.METHOD:
           if (typeof(annotation.methodDecorator) === 'undefined') {
             throw new Error(`Cannot apply @${name} decorator on Method.`);
           }
 
+          method = clazz._defineMethod(propertyKey,
+                                       Metadata.getOwnParamTypes(target, propertyKey),
+                                       Metadata.getOwnReturnType(target, propertyKey));
+          method._addAnnotation(annotation);
+
           return annotation.methodDecorator.call(annotation, target, propertyKey, descriptorOrParameterIndex);
         case DecoratorType.PARAMETER:
           if (typeof(annotation.parameterDecorator) === 'undefined') {
             throw new Error(`Cannot apply @${name} decorator on Parameter.`);
           }
 
+          method = clazz._defineMethod(propertyKey,
+                                       Metadata.getOwnParamTypes(target, propertyKey),
+                                       Metadata.getOwnReturnType(target, propertyKey));
+          parameter = method.getParameter(descriptorOrParameterIndex);
+          parameter._addAnnotation(annotation);
+
           return annotation.parameterDecorator.call(annotation, target, propertyKey, descriptorOrParameterIndex);
         default:
           throw new Error(`Cannot determine decorator[@${name}] type.`);
diff --git a/src/ts/@overflow/commons/decorator/index.ts b/src/ts/@overflow/commons/decorator/index.ts
index 23baea3..6b7a063 100644
--- a/src/ts/@overflow/commons/decorator/index.ts
+++ b/src/ts/@overflow/commons/decorator/index.ts
@@ -1,4 +1,2 @@
 export * from './constants';
 export * from './decorator';
-
-export * from './annotation';
diff --git a/src/ts/@overflow/commons/redux/decorators/action_mapping.ts b/src/ts/@overflow/commons/redux/decorators/action_mapping.ts
index fb2ee7b..da89782 100644
--- a/src/ts/@overflow/commons/redux/decorators/action_mapping.ts
+++ b/src/ts/@overflow/commons/redux/decorators/action_mapping.ts
@@ -1,3 +1,7 @@
+import {
+  Annotation,
+} from '@overflow/commons/core/reflect';
+
 import {
   MetadataKeyType,
   PropertyKeyType,
@@ -5,21 +9,17 @@ import {
 } from '@overflow/commons/core/type';
 
 import {
-  Annotation,
   Decorator,
 } from '@overflow/commons/decorator';
 
-export const ActionMappingMetadataKey = Symbol('ActionMappingAnnotation');
-
 export interface ActionMappingAnnotationAttributes {
   value: string;
 }
 
-export class ActionMappingAnnotation extends Annotation {
+export class ActionMappingAnnotation implements Annotation {
   public readonly attributes: ActionMappingAnnotationAttributes;
 
   public constructor(value: string | ActionMappingAnnotationAttributes) {
-    super();
 
     if (undefined === value) {
       throw new Error(`value attribute must be specified.`);
@@ -34,10 +34,6 @@ export class ActionMappingAnnotation extends Annotation {
     }
   }
 
-  public metadataKey(): MetadataKeyType {
-    return ActionMappingMetadataKey;
-  }
-
   public classDecorator<TFunction extends Function>(target: TFunction): TFunction | void {
     console.log('ActionMapping');
   }
diff --git a/src/ts/@overflow/commons/redux/decorators/reducer.ts b/src/ts/@overflow/commons/redux/decorators/reducer.ts
index 2a2fec6..1bb7540 100644
--- a/src/ts/@overflow/commons/redux/decorators/reducer.ts
+++ b/src/ts/@overflow/commons/redux/decorators/reducer.ts
@@ -1,25 +1,24 @@
+import {
+  Annotation,
+} from '@overflow/commons/core/reflect';
+
 import {
   MetadataKeyType,
   TypeUtil,
 } from '@overflow/commons/core/type';
 
 import {
-  Annotation,
   Decorator,
 } from '@overflow/commons/decorator';
 
-export const ReducerMetadataKey = Symbol('ReducerAnnotation');
-
 export interface ReducerAnnotationAttributes {
   name?: string;
 }
 
-export class ReducerAnnotation extends Annotation {
+export class ReducerAnnotation implements Annotation {
   public readonly attributes: ReducerAnnotationAttributes;
 
   public constructor(name: string | ReducerAnnotationAttributes) {
-    super();
-
     if (undefined === name) {
       this.attributes = {
         name: '',
@@ -36,10 +35,6 @@ export class ReducerAnnotation extends Annotation {
     }
   }
 
-  public metadataKey(): MetadataKeyType {
-    return ReducerMetadataKey;
-  }
-
   public classDecorator<TFunction extends Function>(target: TFunction): TFunction | void {
     console.log('Reducer');
   }
diff --git a/src/ts/@overflow/commons/redux/decorators/rest_api.ts b/src/ts/@overflow/commons/redux/decorators/rest_api.ts
index 5858e80..44b00fc 100644
--- a/src/ts/@overflow/commons/redux/decorators/rest_api.ts
+++ b/src/ts/@overflow/commons/redux/decorators/rest_api.ts
@@ -1,3 +1,7 @@
+import {
+  Annotation,
+} from '@overflow/commons/core/reflect';
+
 import {
   MetadataKeyType,
   PropertyKeyType,
@@ -5,22 +9,17 @@ import {
 } from '@overflow/commons/core/type';
 
 import {
-  Annotation,
   Decorator,
 } from '@overflow/commons/decorator';
 
-export const RestAPIMetadataKey = Symbol('RestAPIAnnotation');
-
 export interface RestAPIAnnotationAttributes {
   entryPath: string;
 }
 
-export class RestAPIAnnotation extends Annotation {
+export class RestAPIAnnotation implements Annotation {
   public readonly attributes: RestAPIAnnotationAttributes;
 
   public constructor(entryPath: string | RestAPIAnnotationAttributes) {
-    super();
-
     if (undefined === entryPath) {
       throw new Error(`entryPath attribute must be specified.`);
     }
@@ -34,10 +33,6 @@ export class RestAPIAnnotation extends Annotation {
     }
   }
 
-  public metadataKey(): MetadataKeyType {
-    return RestAPIMetadataKey;
-  }
-
   public methodDecorator<T>(target: Object, propertyKey: PropertyKeyType,
                             descriptor: TypedPropertyDescriptor<T>): TypedPropertyDescriptor<T> | void {
     console.log('RestAPI');
diff --git a/src/ts/@overflow/commons/redux/decorators/rpc_api.ts b/src/ts/@overflow/commons/redux/decorators/rpc_api.ts
index 9d085a5..71baf73 100644
--- a/src/ts/@overflow/commons/redux/decorators/rpc_api.ts
+++ b/src/ts/@overflow/commons/redux/decorators/rpc_api.ts
@@ -1,3 +1,7 @@
+import {
+  Annotation,
+} from '@overflow/commons/core/reflect';
+
 import {
   MetadataKeyType,
   PropertyKeyType,
@@ -5,22 +9,17 @@ import {
 } from '@overflow/commons/core/type';
 
 import {
-  Annotation,
   Decorator,
 } from '@overflow/commons/decorator';
 
-export const RpcAPIMetadataKey = Symbol('RpcAPIAnnotation');
-
 export interface RpcAPIAnnotationAttributes {
   method: string;
 }
 
-export class RpcAPIAnnotation extends Annotation {
+export class RpcAPIAnnotation implements Annotation {
   public readonly attributes: RpcAPIAnnotationAttributes;
 
   public constructor(method: string | RpcAPIAnnotationAttributes) {
-    super();
-
     if (undefined === method) {
       throw new Error(`method attribute must be specified.`);
     }
@@ -34,10 +33,6 @@ export class RpcAPIAnnotation extends Annotation {
     }
   }
 
-  public metadataKey(): MetadataKeyType {
-    return RpcAPIMetadataKey;
-  }
-
   public methodDecorator<T>(target: Object, propertyKey: PropertyKeyType,
                             descriptor: TypedPropertyDescriptor<T>): TypedPropertyDescriptor<T> | void {
     console.log('RestAPI');
diff --git a/src/ts/@overflow/commons/redux/lpc_reducer.ts b/src/ts/@overflow/commons/redux/lpc_reducer.ts
index 98efea1..627a99c 100644
--- a/src/ts/@overflow/commons/redux/lpc_reducer.ts
+++ b/src/ts/@overflow/commons/redux/lpc_reducer.ts
@@ -1,17 +1,17 @@
+
 import {
-  Action,
-} from './action';
-import {
-  ConstructorType,
+  ClassType,
   Metadata,
   TypeUtil,
 } from '@overflow/commons/core/type';
 import {
   ActionMappingAnnotation,
-  ActionMappingMetadataKey,
-  ReducerMetadataKey,
   ReducerAnnotation,
+  RestAPIAnnotation,
+  RpcAPIAnnotation,
 } from '@overflow/commons/redux/decorators';
+import { Class } from '@overflow/commons/core/reflect';
+import { Action } from '@overflow/commons/redux/action';
 
 export default class LPCReducer {
 
@@ -45,27 +45,31 @@ export default class LPCReducer {
   /**
    * registerReducers
    */
-  public registerReducers(reducerTypes: ConstructorType[]): void {
+  public registerReducers(reducerTypes: ClassType[]): void {
     for (let reducerType of reducerTypes) {
-      let ra: ReducerAnnotation = Metadata.get(ReducerMetadataKey, reducerType);
+      let clazz: Class = Class.forClass(reducerType);
+      let ra: ReducerAnnotation = clazz.getOwnAnnotation(ReducerAnnotation);
       if (undefined === ra) {
         continue;
       }
       console.log(`name: ${ra.attributes.name}`);
-      let ama: ActionMappingAnnotation = Metadata.get(ActionMappingMetadataKey, reducerType);
+      let ama: ActionMappingAnnotation = clazz.getOwnAnnotation(ActionMappingAnnotation);
       if (undefined === ama) {
         continue;
       }
       console.log(`actionMapping-value: ${ama.attributes.value}`);
 
-      let properties = Object.keys(reducerType.prototype);
-      for (let propertyKey of properties) {
-        if (!TypeUtil.isMethod(reducerType.prototype, propertyKey)) {
-          console.log(`property: ${propertyKey}`);
-          continue;
+      clazz.getMethods().forEach(method => {
+        let restAPIAnnotation: RestAPIAnnotation = method.getOwnAnnotation(RestAPIAnnotation);
+        let rpcAPIAnnotation: RpcAPIAnnotation = method.getOwnAnnotation(RpcAPIAnnotation);
+        if (restAPIAnnotation) {
+          console.log(`restAPI: ${restAPIAnnotation.attributes.entryPath}`);
         }
-        console.log(`method: ${propertyKey}`);
-      }
+        if (rpcAPIAnnotation) {
+          console.log(`restAPI: ${rpcAPIAnnotation.attributes.method}`);
+        }
+      });
+
     }
 
   }
@@ -73,7 +77,7 @@ export default class LPCReducer {
   /**
    * registerReducer
    */
-  public registerReducer(reducerType: ConstructorType): void {
+  public registerReducer(reducerType: ClassType): void {
     console.log(``);
 
   }
diff --git a/src/ts/@overflow/modules/member/reducer/member_reducer.ts b/src/ts/@overflow/modules/member/reducer/member_reducer.ts
index 2c5cef0..2e9d6fd 100644
--- a/src/ts/@overflow/modules/member/reducer/member_reducer.ts
+++ b/src/ts/@overflow/modules/member/reducer/member_reducer.ts
@@ -7,7 +7,6 @@ import {
 @Reducer()
 @ActionMapping('@overflow/modules/member/MemberReducer')
 export default class MemberReducer {
-  public path: string;
   /**
    * signin
    */