CSC/ECE 517 Summer 2008/wiki3 7 SHOP PAT: Difference between revisions

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* Optional items can be optimized in such a way so that the processing time will be required only if th eitem is present in the list.
* Optional items can be optimized in such a way so that the processing time will be required only if th eitem is present in the list.


Steps to remember in designing:
===Steps to remember in designing===
* Standard icons and conventions:
* Standard icons and conventions:
* Avoid irrelevant links:
* Avoid irrelevant links:

Revision as of 03:34, 23 July 2008

Problem Definition

Shopper pattern. The idea of a "shopping cart" is ubiquitous in e-commerce. This idea lends itself to abstraction in the form of a Shopper pattern. Find examples and descriptions that are suitable for teaching this pattern, if possible, including some non-obvious applications. Write up your findings in the form of a narrative.

Introduction

The main purpose of Shopper Pattern is to provide as a means to assist people or consumers to obtain a collection of items from a set of shops or the providers. And the goal is achieved without introducing coupling between the consumer and the provider.

Participants

  • Consumer :provide a list of items and user is allowed to choose item among them.Then the price is scanned and placed in the shopping bag.
  • Shopper: Browse through the item from the shopping list and search for the muliple provider for that particular item.Shopper may search the item on diffent basis ex: Brand name, lowest price.highest price etc.
  • Provider:It keeps multiple items and make it available to shopper. At the same time assist the shopper in locating the other providers.
  • Item:The things that are a provider owns,described by an item request,a consumer request, and a shopper obtains.

Consequences

  • Shopper pattern helps in decoupling the requesting object from the object that provide the requested items.
  • The responsibilities can be moved for provider objects.the requesting application will not nee dto be modified.
  • The provider objects can be rearranged without modyfying the requesting application.
  • Optional items can be optimized in such a way so that the processing time will be required only if th eitem is present in the list.

Steps to remember in designing

  • Standard icons and conventions:
  • Avoid irrelevant links:
  • Reveal structure:
  • Leave breadcrumbs:
  • Don't bury information
  • Don't be mysterious:
  • Provide help:
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