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Mauri Ltd has just acquired a new stock management system and the source codes (PhP5) also have been delivered. The coding style is fully object-oriented. The company has been using the system for two weeks and is not satisfied with it. For each user accessing the system, a new connection is made. The User Interface (UI) is not standard. Each update to the database is treated by a separate program. Search facilities have been included but different programs have been written to provide such facilities. You have been asked to refactor the system using Design Patterns.
(a) Identify five design patterns that can be used. Describe how each pattern can be used in the above context. Your answer should consist of a detailed description of the pattern including the structure (diagram) and a justification for its use. Note: Sample codes may be used to explain your answer.
(b) "Familiarity sometimes keeps us from seeing the obvious." In what way can patterns help avoid this?
(c) What are three reasons that cause requirements to change?
(d) What could Christopher Alexander discover by looking at structures that solve similar problems?
Basic Tests - Producing Polygon Surface A few basic tests that must be performed before producing a polygon surface through any graphic package as: 1) All vertexes are list
side-effect of scan-conversion
Explore and understand light field. Checking out one of the image libraries. 1. You can modify existing source code, or develop your own to achieve light field rendering; 2.
Radiosity - Polygon Rendering & Ray Tracing Methods Radiosity simulates the diffuse propagation of light begin at the light sources. Because global illumination is an extremel
Acquire the perspective transformation onto z = - 2 Plane, where (0, 0, 18) is the center of projection. Solution: Now centre of projection, C (a, b, c) = (0, 0, 18) ∴ (n 1
Area Filling Algorithms Before we go ahead with area filling algorithms, a word about pixel addressing and object geometry. You know that line segments are discretized into fin
Delta-Delta Arrangement and In-Line Arrangement There are two types of shadow masks available, delta-delta arrangement and in-line arrangement. The in-line arrangement refers t
want the source code of this titlted program
Time Based and Presentation Tools In such authoring systems, components and events are organized beside a timeline, along with resolutions as high as 1/30 second. Time based to
Question: (a) There are 3 main industries of drawing style and it has become a phenomenon. It was inspired by internationally diffused cartoons, comic strip books and since the
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