Coursework: Art Gallery

1
Coursework Art Gallery

• Software Engineering
• M.Sc Computing Science
• Department of Computer Science
• and Information Systems
• Birkbeck College, University of London
• Wednesday, 27 February 2008
• Deadline 17 April 2008
• Penalty for delay Grade Grade 5
  DaysOfDelay

2
coursework

• An art gallery exhibits paintings and sculptures.
  Both are linked to displacement sensors which are
  triggered if the objects are moved. All exhibits
  are shown in rooms and every room has one or
  several motion sensors, which can also be
  triggered. Each room has an alarm, which is
  notified when either motion or displacement
  sensors are triggered. The alarm is connected to
  a central security system, to which all alarms
  are notified. The security system must create an
  alarm report containing the room number in which
  the alarm occurred and a description of the
  exhibits that are affected and must append this
  report to a log. When a displacement sensor is
  triggered, only the related exhibit is considered
  to be affected. When a room motion sensor is
  triggered, all exhibits in that room are
  considered to be affected. Once notified the
  security system can then identify the closest
  guard to the scene of the incident and page her.
  It is assumed that all objects representing
  security guards have an attribute indicating the
  guards current location, which is updated by an
  external location service.

3
Task 1

• Design a domain model that includes the
  conceptual objects derived from the descriptive
  narrative.
• In no more than 20 lines comment on your design
  and discuss any alternatives.

4
Task 2

• Draw a class diagram of the systems
  architecture. Indicate the nature and cardinality
  of all relationships, any abstract classes and
  indicate which attributes and methods you would
  expect each object to provide.
• Discuss your design in no more than 20 lines
  showing what decisions you have made to reduce
  coupling and increase cohesion.

5
Task 3

• Give a collaboration diagram indicating the
  invocations occurring when a sensor connected to
  a painting is triggered. Indicate sequence
  numbers.
• Give a sequence diagram indicating the
  invocations occurring when a motion sensor
  included in a room is triggered. Indicate the
  signature of each operation invocation, i.e the
  name and type of input arguments and name and
  type of the objects that are returned.

6
Task 4

• Map 3 classes to implementation. For each class,
  write class definitions (attributes and method
  signatures) and method definitions based on the
  interaction and design class diagrams .
• Hint It is not required to create fully-working
  code. In the method bodies you should only
  include statements that denote the order in which
  messages are sent (methods are invoked) in the
  interaction diagrams.

7
Remarks

• Comments that will strengthen your work
• Try to justify and comment on analysis and design
  decisions. Discuss informally what led you to
  analyze and design part of the system in a
  specific manner.
• Describe briefly the methodology used to perform
  a task, based on the output of previous tasks.
  For instance, mention a few points about how one
  can derive different parts of the Implementation
  Model based on Interaction Diagrams or DCDs.
• Use Rational Rose, MSStudio2008, Eclipse, UMLET
  or another similar tool that you are familiar
  with for all tasks.