Readme.md

Introduction

The Proxy Design Pattern is of class Structural and having subclass of Object Structural. It provides the facility of lazy loading objects on demand.

Also Known As

Surrogate

Intention

Provide a placeholder for another object to control access to it.

Motivation

Let's say that we have a Document Editor and when Document is opened if everything is loaded on the first time including large images, it would take a long time to become usable. So, we have to handle the loading of the images on demand, so that the opening time of the document can be decreased. We can handle this problem by creating an image proxy object that will call Draw() method that will render the images of the document instead of the placeholder image.

Structure

Applicability

Use Proxy Design Pattern When:

1. More Versatile or sophisticated reference to an object is required than a simple pointer.
2. Remote Proxy: Local Representation for an object is required in different address.
3. Virtual Proxy: Creation of Expensive Objects is required on Demand.
4. Protection Proxy: Controlling Access to Object is Required.