OBJECT ORIENTED ANALYSIS AND DESIGN USING UML PDF
Object Oriented Analysis & Design using UML 2. Course Background: The object -oriented (OO) development of software systems has undergone a dramatic. UML Applied - Object Oriented Analysis and Design using the UML. THE ELABORATION PHASE. Deliverables. Summary. USE CASE MODELLING. DOWNLOAD PDF .. It presents the nine UML diagrams and how they are applied through the five modelling activities: 3) Object-Oriented Analysis and Design using UML, Simon Bennet, Steve McRobb and Ray Farmer, McGraw-Hill,
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Check Out Object Oriented Analysis and Design Using UML Pdf Free Download. We provide custom-speeches.com Object Oriented Analysis and Design Using UML study. The Object-Oriented Analysis and Design Using UML course provides instruction and practical experience focusing on the effective use of object-oriented. It also used object-oriented analysis and UML in designing. support for multi- technology and easily to use in term of using object-oriented in design level.
In other words, the "belongs-to" relationship between Accounts and Customers is inherited by the CurrentAccount and SavingsAccount classes. This fact simplifies the diagram considerably, removing the need for these relationships to be noted explicitly. This simplification will also be apparent in our final implementation of the system.
This is because, in our banking system, each individual transaction credit, debit, etc. This enables the bank to record exactly where each transaction has come from, and gone to, so to speak.
Object-Oriented Analysis and Design
These last point brings out an interesting feature of what is being shown on an Object Model: clearly it wouldn't make sense for each Transaction to be "debit ed -from" and "credit ed -to" the same Account - no money would be transferred! Obviously, although the lines relationships are shown to the same Account class, they do not necessarily represent links to the same Account object at run-time.
A relationship shown on an Object Model indicates that some kind of run-time link will exist between two instances of the classes shown on the Object Model. Thus the Branch to Accounts relationship should be read as follows: An instance of the class Branch will be linked to zero to many instances of the class Account, whilst an instance of the class Account will be linked to one and only one instance of the class Branch.
They assist in the clarification of the relationships that should be somehow represented in a software system. The important point to note hear is that we are first working out what relationships we need to represent in our system "belongs-to", etc. Put another way, Object Modelling allows us to focus on exactly what problem we are trying to solve, before we look at the best way of implementing our model in a particular programming language.
Lets take a look at a sub-set of our previous example: Figure 4 - Subset of Banking Model Our Object Model shows us that we need four classes: Transaction; Account; Current Account and Savings Account, and that our implementation must enable us to represent the fact that any particular Account has two sets of Transactions associated with it - which will be needed to implement the PrintStatement method.
Here we have a number of choices: linked-lists; collection-classes; dynamically bounded arrays of pointers; etc. Of course, better implementations of the "debit-from" relationship are possible, but the fact that the Account class interface completely hides the underlying implementation of this relationship means that we can improve on our first cut implementation at a later date with little impact on our overall system code.
In other words, use of the Account class interface has limited the impact of the relationship implementation method: something we strive to achieve when writing OO based applications.
This is implicit in our Object Model, and is what the system's users would expect to see. To see why, consider the case when a new Transaction value is entered in error.
The Transaction is linked to two accounts "debit-from" and "credit-to". If the Transaction object is shared, only one object need be modified to rectify the situation.
Object Oriented Modeling & Design Using UML
Using two objects would either mean that either the system has to update two objects equals more coding work , or that the user has to update two Transactions equals greater potential for mistakes.
The point is, however, no matter what mechanism is used, we are actually trying to implement a "many-to-one" relationship between an Account and a Transaction. It is this relationship that exists in the banking problem domain - not a relationship involving linked lists or collection classes.
Object Modelling enables us to spot the relationship required by the problem domain, and then choose the best way of implementing it. Our model does not yet specify in which direction the relationship will be traversed.
Object Oriented Analysis and Design Pdf Notes – OOAD Pdf Notes
If we need to traverse the relationship in both directions - getting from the Transaction to the related Account - our implementation will prove insufficient, and some form of double pointer schema may be needed.
Much work would have been saved if we had known this fact before we had started writing the code. If we do, then a linked-list will prove an inefficient choice of implementation. Again, it would be very useful to know this type of information before we start trying to implement the relationship. From these points we can see that we need to consider the wider requirements of our system before we can come up with the right implementation of our "debit-from" relationship not to mention the many other classes and relationships that might be required.
We can't produce a good design for a system unless we consider all the required functionality - in detail. Use Cases provide the mechanism for doing this.
They provide a useful technique which, in conjunction with Object Modelling, help us to clarify exactly what the system is supposed to do. Each type of user typically has their own particular set of requirements for a system: hence identify user types assists in identifying all the required system functions. The Use Case diagramming technique allows us to make a first cut at defining the system requirements, and will help us in presenting these requirements back to the users of the system.
It also partitions the system into single atomic business functions, which may be used as a basis for costing the system, or for planning a phased system delivery. In this case each successive phase would deliver further batches of Use Cases. Further information is still required, however, to tie down the detail of what each businese function does. Outputs: Details what information flows from the system to the external environment, in this case the printer!
Object Oriented Analysis and Design Pdf Notes – OOAD Pdf Notes
A customer can pay his bill by credit card or pay utility bill. What are the phases stages of it? Which phase requires maximum efforts? Also explain why domain analysis i. Under what situation activity diagram should not be used? Which diagrams are preferable under such situations?
Object-Oriented Analysis and Design with UML : Training Course
Also give practical situations, when to use the following diagram:a. Use-Case Diagram, b. Object Diagram, c.
Draw the Interaction diagram for an ATM — used for card based banking system. Prepare object diagram showing at least 10 relationships among the following object classes. Include associations and qualified associations, aggregations, generalizations, and multiplicity.Loosely coupled some dependencies e-Macao Cohesion e-Macao Low Cohesion Example Definition Cohesion or Coherence is the strength of dependencies within a subsystem.
C 6 Which of the following statements are true for the following diagram? It also deals with non-functional requirements and the deployment of the executable modules onto nodes.
Note e-Macao Task 14 Annotation element: Considering four views of a typical system - user, static, dynamic and implementation, each of the nine UML diagrams are discussed extensively for modelling these views.
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