OBJECT ORIENTED SYSTEM DESIGN BY ALI BAHRAMI PDF
Ali Bahrami. Object Format: PDF / ePub / Kindle modeling, analysis, and design, while Joe armstrong the degree of object oriented but a. Object-oriented systems development. Details. Category: Author(S) Ali Bahrami (Author). Publication. Data System design Object oriented programming. Object-Oriented Systems Development Bahrami The Booch method detailed object-oriented design models design, and implementation of a system using.
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DEVELOPMENT. Ali Bahrami . Object-Oriented Design Axioms .. This chapter provides an overview of object-oriented systems development and. Download Book names as Object Oriented System Development By Ali Bahrami easily without any login or cittadelmonte.info we are providing. Object oriented systems development / Ali Bahrami modeling language (UML) for modeling, describing, analyzing, and designing an application. Publisher: Singapore: McGraw-Hill, ; Digital Description: application/pdf, xx, p.: ill.
View Larger Image. Ask Seller a Question. Object Oriented Systems Development. This book, intended for an introductory course in object-oriented systems development at the junior, senior and first-year graduate level, provides a clear description of the concepts underlying object-oriented systems development. Visit Seller's Storefront.
Chapter 1: Object Basics Chapter 3: Systems Development Life Cycle: Unified Approach. Unit — 2 Chapter 4: Object-Oriented Methodology Chapter 5: Unified Modeling Language Unit — 3 Chapter 6: Object-Oriented Analysis: Object Analysis: Classification Chapter 8: Object Relationship Analysis.
Unit — 4 Chapter 9: A class implements one or more interfaces. Graphically interfaces are rendered as a mode together with its name. Class b. H is rendered just like class with heavy lines. Graphically a node is rendered as a cube. These are the verbs of models. Package A package is a general-purpose mechanism for organizing elements into groups. These are the boxes into which or model can be decomposed. An interaction involves a number of elements including messages.
All other grouping things can be placed in package. One primary kind of grouping is package. Display State Machine It is a behavior that specifies the sequences if states an object or an interaction goes through during its lifetime in response to events together with its response to those events.
It includes only its name and sometimes its contents. Aggregation is a special kind of association representing a structural relationship between whole and its parts These are the comments you may apply to describe.
A node is a simply a symbol for rendering constraint and comments attacked to an element or a collection of elements There are four kinds of relationships in the UML. UML includes nine diagrams: A diagram may contain any combination of things and relationships. You will encounter realization relationship in two places o Between interfaces o The classes or components.
Diagram is a projection into a system. Divisions of class and object and interfaces and implementations in a diagram. Notation starts with basic symbols. It can be representing with adornments.
For example the notation of class has private. Customer Chan: Customer 2. It contains objects. A time constraint is a semantic statement about the relative or absolute value of time Location is the placement of component on a mode. Thread specifies lightweight flow that can execute concurrently with other threads within the same process. State chart diagram — founded on the changing state of a system driven by events.
Use case diagram — organizes the behavior of the system. Each class have unique name The name alone is known as simple name. Collaboration diagrams — focused on the structural organization of objects that send and receive messages 4.
Sequence diagram — focused on the time ordering of message 3. In other words. An attribute represents some property of the thing you are modeling that is shared by all objects of that class. A mechanism is a design patterns that applies to a society of classes. The UML is such as graphical language.
Object oriented systems development / Ali Bahrami - BookSG - National Library Board, Singapore
In particular. Model the mechanism as collaboration. To address these problems o Models should be written in UML. Identify the elements in a specific of the design pattern that must be bound to elements in a specific context and render them as parameters to the collaboration.
Typically projects and organizations develop their own language. This means that it is possible to map from model in the UML to a programming language such as java. The UML also provides a language for expressing requirements for tests. The reverse is also possible. You can reconstruct a model from an implementation back into the UML. The UML addresses the documentation of a system is architecture and all of its details. The generation of ode from a UML model into a programming language.
This kind of relationship is called aggregation. Mapping permits forward engineering. Aggregation is really just a special kind of association and is specified by adoring a plain association with an open diamond at the whole end. Write the use of Collaboration diagram?
Discuss the merits and demerits? Write a note on dynamic model?
Object Oriented System Development By Ali Bahrami
Discuss about the static model? Discuss the various models of ooad? Prepare a portion of a class diagram for library checkout system that shows the late charges for an overdue book as a derived attribute 2.
Discuss about the patterns? And how far it is efficiently utilized? Discuss the importance of UML? In the UML.
Differentiate the static and dynamic model? Write a note on functional model? Class Diagram: Class Name Attribute: A class diagram shows a set of classes. Structural Diagrams. Interfaces and collaborations and their relationships. Behavioral Diagrams 3.
Class diagrams are the most commons diagram found in modeling objectsoriented systems. A component diagram describes the organization of the physical components in a system.
Component 3. Node Node 3. You use deployment diagrams to illustrate the static deployment view of architecture. A deployment diagram shows a set of nodes and their relationships. Object name: Class name 2. You can think of the dynamic aspects of a systems as representing it changing parts.
You use component diagrams to illustrate the static implementation view of a system. A collaboration diagram shows a set of objects links among those objects.
You use state chart diagrams to illustrate the dynamic view of a system. An activity shows a set of activity. A sequence diagram shows a set of object and the messages sent ad received sent and received by more objects. Collaboration is also the specifications of how an element. You apply use case diagrams to illustrate the static use case view of a system.
Collaborations Collaboration is society of classes. Use collaboration diagrams if you want to emphasis the structural relationships among these objects as they collaborated. A behavioral part specifies the dynamics of how those elements interact.
Consider the individual scenarios that represents this use case. Organize these structural and behavior elements as a collaboration that you can connect to the use case via realization. Each scenario represents a specific path through the use case. Capture the dynamics of these scenarios in interaction diagrams. Identify those structural elements necessary and sufficient to carry and the semantics of the use case.
Capture the organization of these structural elements in class diagrams. Use sequence diagrams if you want to emphasis the time ordering of messages. If the operation is trivial. Each process and thread within a system defines a distinct of control and with each flow.
Validate these mechanisms early in the development life cycle. Expand on the structural and behavioral part of each collaboration. If the operation is algorithmically intensive.
These mechanisms are driven by the overall architectural state you choose to improve op your implementations. If the operation is complex or otherwise requires some detailed design work.
Represent each of these mechanisms as a collaboration. You can explicitly model the order of the message relative to the start of the sequence by prefixing the message with a sequence number set apart by a colon separator. To better visualize the sequence of a message. Lacte Nested flow of control 2: Most commonly.
Sequence Number Message 2: Clidk At p View C: Controller 2. You can specify a procedural or nested flow of control. A path name is the class name prefixed by the name of the package in which class lives. Emp Name Address Phone Operations An operation is the implementation if of a service that can be requested from any object of the class to affect behavior. Names are a textual string to differentiate from other classes.
Student Felwa: Square Simple Name Pathname Attributes An attribute is named properly of a class that describes a range of values that instances of the property may hold. In order words. You can associate timing marks with a sequence. Each class have unique names. An attribute represents some properly of the thing you are modeling that is shared by all objects if that class.
That name alone is known as simple name. A class is a description of a set of objects that share the same attributes. The specification if an asynetmnous stimulus communicated between instances. A physical element that exists at runtime and that represents a computational resource. A type whose values have no identified including primitive built in types. A description of a set of a sequence of actions including variants. Classifiers include classes.
The most important kind of classifier to the UML is the class. A physical and replaceable part of a system that conforms to and provides the realization of a set of interfaces. Interface Data type Signal Component Node — — — — — A collection of operators that are used to specify a service of a class or a component.
A grouping of elements of which some constitute a specification of the behavior offered by the order-contained elements. Multiplicity applies to attributes. Company 1. The visibility of factors specifies whether other classifiers use it. Operating In an operation at the most abstract level. The most common use of template classes is to specify containers that can be instantiated for specific elements making them type safe. An output parameter In out.
Most often you will use togged values to extend class properties. There are three defined properties that you can use with attributes. Frozen — the attributes value may not be changes after the object are initialized.
You will mainly want to use frozen when modeling constant or write once attribute. Add only — For attributes with a multiply greater than one. A template includes slots for classes. In-An input parameter Out. For a template class the result is a concrete class that can be used fust like any ordinary class. Algorithms are not thought of as design patterns. Specify the responsibilities of the class. A framework is an architectural pattern that provides an extensive template for applications within a domain.
Specify collaboration has a structural part. Specify a state machine for the class. A state machine is a behavior that specifies the sequence of states an object goes through during its response to events.
A responsibility is a contract or obligation of a type or class and is rendered in a note attacked to a class. Efforts have also been made to codify design patterns in particular domains. Specify the semantics of the class as a whole using structured text. Utility — Specifies a class whose attributes and operations are all class scoped. NOTES 3. It is a description or template for how to solve a problem that can be used in many different situations.
Specifies a classifier whose objects are children of a given parent. Power type. Specify the pre and post conditions of each operation. A design pattern is not a finished design that can be transformed directly into code. Metaclass —Specifies a classifiers whose objects are children of a given parent. These elements are rendered in notes attacked to the operation or class by a dependency relationship.
A mechanism is a design pattern that applies to a society of classes. Object-oriented design patterns typically show relationships and interactions between classes or objects.
Specify the pre and post conditions of each operation plus the invariants of the class as a whole. Expose the slofs. Identify the elements of the design patterns that must be bound to elements in a specific context and render them as parameters to the collaborations. For the most part. Model the framework as a stereotyped package. Modeling an architectural pattern. Define attributes. Iterate and refine again. Identify access layer class relation ships. Refine and complete the static UML class diagram.
The specification of subsystems that perform required functions and provide infrastructure support. A description of objects that form the building blocks of the system and a description of the communication mechanisms that allows data to flow between layers. Activities of Object. Design the access layer Create mirror classes: For every business class identified and created. Design methods and protocols by utilizing a UML activity diagram.
Define association between classes Define class hierarchy and design with inheritance. It maintains the independence of components. Redundant Classes: Select one an eliminate the other classes. Literate and refine again 3. Iterate and refine.
Build a prototype of the view layer interface. It is used to eliminate redundant classes and structures. The information axiom. Each component must satisfy that requirements without other requirements. Design the view layer objects by applying the design Axions.
It applies during design process of a system. A theorem is a proposition that may not be self-evident but can be proven from accepted axions. Method Classes: Revisit the classes that consist of only one or two methods to see if they can be eliminated or combined with existing classes. Design the micro level user interface. The components are such as classes. A corollary is a proposition that from an axions or another proposition that has been proven.
It minimizes the information content of the design. Iterate and refine the whole design. Reapply the design axions and. Axioms of Object-Oriented Design Axiom1: What are the design attribute What do you meant by design pattern Explain about the multiplicity in OO design Differentiate the super class and subclass? Discuss the necessity for documentation Write a note on modeling techniques discuss about the object modeling techniques How do you design the design pattern for the object-oriented software?
It can implement through inheritance and the systems built in classes. Actors user of the system: Anything external to the system — not only people: Jacabson early s. Books — Author. A use-case model can be instrumental in project development. Communication associations: Links between actors and use cases. A use case is a narrative document that describes the sequence of event an actor performs using a system to complete a process.
Number of copies Borrower — Name. Wherent unit of functionality or task. Borrow book. An actor denoted a user interacting directly with the system. An actor may be external device or system. Class is used to define the attributes. Nouns in the textual description are considered to be classes and verbs to be methods of the class. Look for nouns and noun phrases.
These are implemented in design phrase itself. Use cases are used to identify requirements. Some classes are taken from built in classes for implementation ifa specific operation All classes must make sense in the application domain. Classes may be added or removed from the model dynamically. Object types provide an index for system process.
Object can be categorized into more than one way. In this approach iterative process is implemented. In object oriented programming. Select any one. To communicate with others. Attributes such as who. Choose appropriate vocabulary. Identifying relevant classes and eliminating irrelevant classes is an incremental process. Choose whether the object represented by the noun behave differently when the adjective is applied to it.
Places Class: Formulate a statement of purpose for each candidate. A customer places an order with an operation person. Company has a name. The association name can be omitted if the relationship if default. Restate ternary association as binary associations. Determine the capability of class and it needs with their relationships.
It used to communicate with other classes and objects. It is not relationship among objects. ACCn number. An Example. It is concerned with implementation or design or the class. It correspondents to a verb or promotional phrase A reference from one class to another is an association. Student object fee is a part of it. It also more difficult to understand programs written is a multiple inheritance.
Making the relationship between two classes can be useful to interface to share attributes rough objects. Properties of aggregation. Inherit it by creating new class with their own attributes and methods.
Specialize only when the subclasses have significant behavior. Super — sub class relationships Guidelines for identifying super-sub relationships. It can be defined in terms of other associations. Group then by moving common attributes and methods to an abstract class. Avoid this association because theses are redundant terms.
Behavior each is unique. Collection-member A conceptual whole encompasses parts that may be physical or conceptual. A correct team is a collection of players.
A-part-of Relationship patterns To identify a-part-of structures. Assembly An assembly is constructed from its parts and an assembly part situation physically exists. Example A bicycle is an assembly of wheel. A fridge can be container for fruits. Propagation The state of the whole is determined by the state of the parts. Responsibilities should be shared arrows related classes when appropriate.
The idea is to organize the relationships between the classes on the basis of fulfilling a scenario. Information and the behavior related to it should reside within the same class.
Each responsibility should be stated as generally as possible. The CRC forms provide a mechanism for following through a scenario. Information about are thing should be localized with a single class. Class name: With drawl Super class: Transaction Role: Store withdraws transaction information. When the operations and responsibilities of a class identified through design reviews.
Validate a customer card. Knowing date. CRC formed can also be used early in the design process as a discovery aid.
Super class: Bank Super class: Nil Role: A description of object Classes the form the building clocks of the system. Description of the communication mechanisms that allow data to flow layers. PIN validate a withdraw transaction card. Aim Id and Amount. For every Business class identified and created.
A corollary is a preposition that follows from an axioms or another proposition that has been proven.
It maintaining the independence of components. A theorem is a preposition that may not be key-orient but can be proven from accepted ascoms.
Reapply the design axioms and. Minimizing complexity should be goal. Whensivenets among objects and software components in order to improve coupling. These will useful in making specific design decisions. Corollary can be called as design rules Corollary 1 Uncoupled — design with less information content: Each component must satisfy that requirement without other requirements. It depends on the interface complexity between modules. It minimum the information content of the design.
In this rule the main goal is to maximize object. It is because a minimal amount of essential information needed to be passes between components. For both to read and write operation of attributes. It occurs often on object or module makes use of data or control information maintained within the boundary of another object or module.
Coincidentally cohesion is a cohesion that performs tasks that are related logically each other objects. It refers to attributes or methods of another object. It refers the single purposes ness of an object. This should be the goal of an architectural design.
Method cohesion like function cohesion means that a method should carry only one function. It is very common in most software designs. IT is exhibited in the portion of structure. Inheritance cohesion concerned with interrelation of classes with attributes. It involves explicit control of the processing logic of one object by another.
Define the class hierarchy and design with inheritance. Protected visibility allows child classes to accesses information they inherited from a parent class. Iterate and refine the class system. The private protocols of the class includes message that normally should not be send from other objects.
The solution that motivates these forces. Designing well-defined public. Guidance that leads to effective implementation Example source code or source code templates. It is accessible only to operations of the class. Cross-reference to related design patterns. Public visibility allows all other classes to view the marked information.
The classes that are required to implement the solution classes. Multiplicity or multi value attributes Instance connection 4. Visibility name: Example a person can have more than one account. In the design phrase. It is reference to reference to another object It provides the mapping needed by an object to fulfill its responsibilities. To list the student who have scored above marks.
The public protocol defines the stated behavior of the class as global and it is accessible to all classes. Ask Seller a Question. Object Oriented Systems Development. This book, intended for an introductory course in object-oriented systems development at the junior, senior and first-year graduate level, provides a clear description of the concepts underlying object-oriented systems development.
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