new approach for builder pattern

builder/builder.ts

@@ -1,69 +1,104 @@
 namespace BuilderPattern {
- export class UserBuilder {
- private name: string;
- private age: number;
- private phone: string;
- private address: string;
-
- constructor(name: string) {
- this.name = name;
- }
-
- get Name() {
- return this.name;
- }
- setAge(value: number): UserBuilder {
- this.age = value;
- return this;
- }
- get Age() {
- return this.age;
- }
- setPhone(value: string): UserBuilder {
- this.phone = value;
- return this;
- }
- get Phone() {
- return this.phone;
- }
- setAddress(value: string): UserBuilder {
- this.address = value;
- return this;
- }
- get Address() {
- return this.address;
- }
-
- build(): User {
- return new User(this);
- }
- }
-
- export class User {
- private name: string;
- private age: number;
- private phone: string;
- private address: string;
-
- constructor(builder: UserBuilder) {
- this.name = builder.Name;
- this.age = builder.Age;
- this.phone = builder.Phone;
- this.address = builder.Address
- }
-
- get Name() {
- return this.name;
- }
- get Age() {
- return this.age;
- }
- get Phone() {
- return this.phone;
- }
- get Address() {
- return this.address;
- }
+ export interface Builder<T> {
+ build(): T;
+ }
+
+ export class User {
+ private name: string;
+ private age: number;
+ private phone: string;
+ private address: string;
+
+ constructor(builder: UserBuilder) {
+ this.name = builder.Name;
+ this.age = builder.Age;
+ this.phone = builder.Phone;
+ this.address = builder.Address;
+ }
+
+ get Name() {
+ return this.name;
+ }
+ get Age() {
+ return this.age;
+ }
+ get Phone() {
+ return this.phone;
+ }
+ get Address() {
+ return this.address;
+ }
+ }
+
+ export interface Director<T> {
+ create(): T;
+ }
+
+ export class UserBuilder implements Builder<User> {
+ private name: string;
+ private age: number;
+ private phone: string;
+ private address: string;
+
+ constructor(name: string) {
+ this.name = name;
+ }
+
+ setAge(value: number): UserBuilder {
+ this.age = value;
+ return this;
+ }
+
+ setPhone(value: string): UserBuilder {
+ this.phone = value;
+ return this;
+ }
+
+ setAddress(value: string): UserBuilder {
+ this.address = value;
+ return this;
+ }
+
+ getUser() {
+ return this;
+ }
+
+ build(): User {
+ return new User(this);
+ }
+
+ get Name() {
+ return this.name;
+ }
+
+ get Age() {
+ return this.age;
+ }
+
+ get Phone() {
+ return this.phone;
+ }
+
+ get Address() {
+ return this.address;
  }
+ }
+
+ export class UserDirector implements Director<User> {
+ constructor(private userBuilder: UserBuilder) {}
 
+ create() {
+ if (this.userBuilder.Name === 'Jancsi') {
+ this.userBuilder.setAge(12)
+ .setPhone('0123456789')
+ .setAddress('asdf');
+ } else {
+ this.userBuilder.setAge(0)
+ .setPhone('xxxxxxxxx')
+ .setAddress('xxxx');
+ }
+
+ return this.userBuilder.build();
+ }
+ }
 }

builder/demo.ts

@@ -3,13 +3,12 @@
 namespace BuilderPattern {
  export namespace Demo {
  export function show() : void {
- var u: BuilderPattern.User = new BuilderPattern.UserBuilder("Jancsi")
- .setAge(12)
- .setPhone("0123456789")
- .setAddress("asdf")
- .build();
- console.log(u.Name + " " + u.Age + " " + u.Phone + " " + u.Address);
+ let userBuilder: BuilderPattern.UserBuilder = new BuilderPattern.UserBuilder("Jancsi");
+ 
+ let director: BuilderPattern.UserDirector = new BuilderPattern.UserDirector(userBuilder);
+ let user: BuilderPattern.User = director.create();
+
+ console.log(user.Name + " " + user.Age + " " + user.Phone + " " + user.Address);
  }
  }
 }
-