Department of Information Technology

Design Patterns Lab Lab Manual [Subject Code]

I M Tech – II Semester [Branch: IT]

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Department of Information Technology

Lab Manual for the Academic Year 2008-09(In accordance with JNTU syllabus)

SUBJECT : DP LAB

SUBJECT CODE :

SEMESTER :

STREAM : Department of Information Technology

INSTRUCTOR :

PROGRAMMERS :

Head IT

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Department of Information Technology

Lab Manual for the Academic Year 2008-09(In accordance with JNTU syllabus)

Suggestions from Principal:

Enhancement if any:

Comments:

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INDEX

S. No Contents

1 Lab Objective

2 Introduction About Lab

3 Guidelines to Students

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List of Lab Exercises

4.1 Syllabus Programs (JNTU)

4.2 Additional and Advanced Programs

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1.Description about UML

2. Description about DP

6 Solutions for Programs

7 Solutions for Additional Programs

8 References

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LAB OBJECTIVE

Overview Object ModelUML

Basic Model Advanced Models

Class & Object Collaboration Sequence

Use Cases Advanced Modeling

Component Diagram Deployment Diagrams

INTRODUCTION ABOUT LAB

There are 66 systems (Compaq Presario) installed in this Lab. Their configurations are as follows:

Processor : AMD Athelon ™ 1.67 GHz

RAM : 256 MB

Hard Disk : 40 GB

Mouse : Optical Mouse

Network Interface card : Present

Software

All systems are configured in DUAL BOOT mode i.e., Students can boot from Windows XP or Linux as per their lab requirement.

This is very useful for students because they are familiar with different Operating Systems so that they can execute their programs in different programming environments.

Each student has a separate login for database access

Oracle 9i client version is installed in all systems. On the server, account for each student has been created.

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This is very useful because students can save their work ( scenarios’, pl/sql programs, data related projects ,etc) in their own accounts. Each student work is safe and secure from other students.

Latest Technologies like DOT NET and J2EE are installed in some systems. Before submitting their final project, they can start doing mini project from 2nd year onwards.

MASM ( Macro Assembler ) is installed in all the systems

Students can execute their assembly language programs using MASM. MASM is very useful students because when they execute their programs they can see contents of Processor Registers and how each instruction is being executed in the CPU.

Rational Rose Software is installed in some systems

Using this software, students can depict UML diagrams of their projects.

Softwares installed: C, C++, JDK1.5, MASM, OFFICE-XP, J2EE and DOT NET, Rational Rose.

Systems are provided for students in the 1:1 ratio.

Systems are assigned numbers and same system is allotted for students when they do the lab.

Description about DP

Each pattern describes a problem which occurs over and over again in our environment, and then describes the core of the solution to that problem, in such a way that you can use this solution a million times over, without ever doing it the same way twice“

• A design pattern– Is a common solution to a recurring problem in design

– Abstracts a recurring design structure

– Comprises class and/or object

• Dependencies

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• Structures

• Interactions

• Conventions

– Names & specifies the design structure explicitly

• A design pattern has 4 basic parts:

– 1. Name

– 2. Problem

– 3. Solution

– 4. Consequences and trade-offs of application

• Language- and implementation-independent

• A “micro-architecture”

• Adjunct to existing methodologies (Unified, OMT, etc.)

• No mechanical application

– The solution needs to be translated into concrete terms in the application context by the developer

Goals

• Codify good design– Distil and disseminate experience

– Aid to novices and experts alike

– Abstract how to think about design

• Give design structures explicit names

– Common vocabulary

– Reduced complexity

– Greater expressiveness

• Capture and preserve design information

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– Articulate design decisions succinctly

– Improve documentation

• Facilitate restructuring/refactoring

– Patterns are interrelated

– Additional flexibility

Description about UML

INTRODUCTION

The Unified Modeling Language (UML) is a graphical language for visualizing, specifying, constructing, and documenting the artifacts of a software-intensive system.The UML offers a standard way to write a system's blueprints, including conceptual things such as business processes and system functions as well as concrete things such as programming language statements, database schemas, and reusable software components."

The important point to note here is that UML is a 'language' for specifying and not a method or procedure. The UML is used to define a software system; to detail the artifacts in the system, to document and construct - it is the language that the blueprint is written in. The UML may be used in a variety of ways to support a software development methodology.

A modeling language for specifying, visualizing, constructing, and documenting Used to derive or evolve a system Means to capture and communicate a knowledge about a system Focuses on understanding a subject via creating a model It unifies the language of communication about a system Uses visualization Can be used as a 'blueprint' of a system Can be used through out the lifecycle of the system

UML is NOT

A visual programming language, but a visual modeling language A tool or repository specification, but a modeling language specification A process, but enables processes

UML is a general purpose, broadly applicable, tool-supported, (industry standardized) modeling language

Where does UML fit?

UML at its widest formalizes the notion of concepts and defines a language of specifying modes

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UML formalizes uses the above level to formalize the paradigm concepts (OO) UML formalizes the modeling of classes or types UML formalizes the modeling of objects or instances

Architectural views of UML

The user model view

- Use Case Diagram - The functionality of a system

The structural model view

- Class Diagram - The static structure of a system

- Object Diagram - The static structure of a system at a particular time

The behavioral model view

- Sequence Diagram - Interaction among elements of a system in a time sequence

- Collaboration diagram - Interaction among elements and their relations organized in time and space

- State Diagram - The status condition and responses of the elements of a system

- Activity Diagram - The activities of the system

The implementation model view

- Component Diagram - The organization of the elements realizing the system

The Environment model view

- Deployment diagram - Configuration of environment elements and the mapping of elements realizing the system into them

Modeling Mechanisms

Perspectives define a particular point of view

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Dichotomies define how something can be viewed from different perspectives and discover inconsistencies within models

Layers of abstraction define a particular level of abstraction and establish the level of detail, enables focused communication, used for organization of models

Extension mechanisms define the means of customizing and extending the UML

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Index PageS. No. Date Program / Experiment Page

No.Sign / Remarks

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Annexure - 2

Index PageS. No. Date Program / Experiment Page

No.Sign / Remarks

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Annexure - 2

UML Syllabus Programs (JNTU)

S. No Programs1. Use case Diagram for Librarian Scenario2. Using UML design Abstract factory design pattern3. Using UML design Adapter-class Design pattern4. Using UML design Adapter-object Design pattern5. Using UML design Strategy Design pattern6. Using UML design Builder Design pattern7. Using UML design Bridge Design pattern8. Using UML design Decorator Design pattern9. User gives a print command from a word document. Design to represent this

chain of responsibility Design pattern10. Design a Flyweight Design pattern11. Using UML design Facade Design pattern12. Using UML design Iterator Design pattern13. Using UML design Mediator Design pattern14. Using UML design Proxy Design pattern15. Using UML design Visitor Design pattern16.17.18.19.20.21.22.23.24.25.26.27.28.29.30.31.33.34.35.36.37.38.

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1. Use case Diagram for Librarian Scenario.

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2. Using UML design Abstract factory design pattern.

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3 .Using UML design Adapter-class Design pattern.

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4. Using UML design Adapter-object Design pattern.

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5. Using UML design Strategy Design pattern.

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6. Using UML design Builder Design pattern.

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7. Using UML design Bridge Design pattern.

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8. Using UML design Decorator Design pattern.

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9. Design to represent this chain of responsibility Design pattern.

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10. Design a Flyweight Design pattern.

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11. Using UML design Facade Design pattern.

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12. Using UML design Iterator Design pattern.

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13. Using UML design Mediator Design pattern.

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14. Using UML design Proxy Design pattern.

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15. Using UML design Visitor Design pattern.

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