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Questions tagged [proxy-pattern]

A design pattern that provides a placeholder for another object to control access, reduce cost, and reduce complexity. One of the Gang of Four's structural design patterns.

A Proxy may

  • Provide a surrogate or placeholder for another object to control access to it.
  • Use an extra level of indirection to support distributed, controlled, or intelligent access.
  • Add a wrapper and delegation to protect the real component from undue complexity.

This is one of the Gang of Four's structural , first published in Gamma et al.'s book "Design Patterns: Elements of Reusable Object-Oriented Software".

More information is available on Wikipedia.

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What is the ISubject and Operation() of the code in proxy design pattern?

I want to know base using the code below what is the: 1. ISubject and Operation() 2. realSubject: RealSubject and 3. Operation() realSubject.Operation() on the UML diagram of Proxy design pattern link //Payment.java import java.math.*; import…
Zhacantal Lizardo
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How to use Proxy Pattern with MVC

As part of a larger school project I have an application design using MVC pattern and now have a new requirement to add a remote monitoring station. It seems the proxy pattern is best for the remote monitor but... Does it make sense to hook the…
CodeKid
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what is the code for main class in proxy design pattern?

Please help me to create the main class of this proxy design pattern? //Filename:Payment.java import java.math.*; import java.rmi.*; public interface Payment extends Remote{ public void purchase(PaymentVO payInfo, BigDecimal price) …
Mae Zi
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Implementation of Proxy Design Pattern

I look the Proxy Pattern in the Wikipedia site : http://en.wikipedia.org/wiki/Proxy_pattern I understand the program in one computer. But i ask me questions about the realization in 2 computers. in reality, in "real life", i suppose that : 1)…
Thomas
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Proxy-Pattern with multiple interfaces

I use instanceof to test for capabilitys. interface Animal{} class AnimalImpl{} class Cage{ public Animal animal; } If i have a Cage cage with a Animal and like to add a Proxy for Fly and Run to the Animal interface Fly{} interface Run{} I do…
Grim
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Proxy Design Pattern : Disadvantages

I was going through one of the Articles on Proxy pattern. Read the Comments After the Explanation In this article there are few downsides mentioned for Proxy Patterns, but I am not able to understand: 1) The downside here is 'magic' could be…
Sunny Gupta
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How to dynamically implement proxy pattern in flex action script?

I need to implement a proxy pattern for flex action script. The source object contains 40-50 methods, and may keep increasing, so I hope I could avoid implementing individual methods in the source object. I remember in java, I could use reflection…
BlueDolphin
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Is EF Lazy Loading a real Proxy Pattern?

I know EF use Proxy Pattern to implement lazy loading. 1.Stand Proxy Pattern: In the proxy pattern,[Proxy] will not be inherited from [RealSubject]. 2.EF In lazy loading,[Proxy] class will be inherited from [RealSubject]. So this is not exact the…
user1917528
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What is the difference between a Data Transfer Object (DTO) and a proxy object?

I just do not see the difference between the two.
Ryan Newman
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Proxy pattern - why to implement interface from real object class?

I do not understand why do I have to implement the interface in Proxy Pattern target object to represent. I think at it as the common use of an interface, which is implemented by proxy class, which will provide to get real object class info and show…
Noomak
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