2010

UML Design for Library

Management System

Iroshan Priyantha

Use-Case Diagrams for Library Management System

1. Actors of the Library Management System

Member

Administrator

Librarian

Guest

2. Use cases of Library Management System

Login

View User Details

View Books

View Members

Reserve Books

Search Books

Issue Books

Return Books

Add/Remove Books

Add/Remove Members

3. Use Case diagram for Library Management System

Login

Member

Librarian

Administrator

View User Details

View Books

Reserve Books

Search Books

Issue Books

Return Books

View Members

Add/Remove

Books

Add/Remove

Members

Guest

4. Use Case Scenarios

Use Case: Login

Introduction: To interact with the system, LMS will

validate its registration with this system. It

also defines the actions a user can perform

in LMS.

Actors: Administrator

Librarian

Member

Pre- conditions: User must have proper client installed on

user terminal.

Post- conditions: System should transfer control to the user

main screen to proceed desired further

actions.

Basic Flow: System show login screen

Enter user Id & password

Acknowledge the entry.

Alternative Flow: user Id or password is incorrect, user will

be prompted a message regarding the

error.

Transfer control back to login screen.

Special Requirements: User should acquire user Id & password

before login to the system.

Relationships: The base case includes checking the

database case.

Use Case: View User Details

Introduction: To see the details of the registered user &

the books currently borrowed from the

library.

Actors: Member

Pre- conditions: User must be logged in to the system.

Post- conditions: View user details.

View books borrowed.

Basic Flow: Enter to the view details page

View user details & books borrowed.

Print details.

Alternative Flow: User does not want to print the details,

user can ignore the step.

Special Requirements:

Relationships: The base case includes checking the

database case.

The base case includes retrieve data case.

Use Case: View Books

Introduction: To display the details, when a member,

guest or administrator wants to see the

details on the available books.

Actors: Administrator

guest

Member

Pre- conditions: User should have the client interface.

Books should be stored in the database

& available to retrieve.

Post- conditions: User should be displayed all the

available books with the complete

details.

Basic Flow: Identify the user type – member, guest

or administrator

Display the book details

Print the details

Alternative Flow: User does not want to print the details,

user can ignore the step.

Special Requirements:

Relationships: The base case includes checking the

database case.

The base case includes retrieve data

case.

Use Case: Reserve Books

Introduction: User can reserve a book by inputting the

relevant details & the librarian can also

reserve a book for a member.

Actors: Librarian

Member

Pre- conditions: User should be logged into the system.

User should have correct book Id.

Books should be available to reserve.

Post- conditions: User should be reserved the book

successfully.

A message should be prompted regarding

reserving.

Database should be updated.

Basic Flow: Member type identified.

Enter book Id & member Id.

Reserve the book.

Update the system.

Alternative Flow: User Id or book Id is incorrect, user will

be prompted a message regarding the

error.

Transfer control back to user screen.

The book is already issued a message

will be prompted regarding the error.

Special Requirements: User should acquire book Id to reserve a

book.

Relationships: The base case includes checking the

database case.

The base case includes validating

reservation case.

The base case includes update database

case.

Use Case: Search Books

Introduction: Member or guest can search for a

particular book in the book library by

book name or category.

Actors: Member

Guest

Pre- conditions: Guest & member should available the

client interface of the library.

Members should be logged into the

system.

Book should be available to search.

Post- conditions: The user should be given the results of

the search with full details.

Basic Flow: Member type identified.

Select the search type.

Check the availability.

View the search results.

Alternative Flow: The search is not found a message will be

prompted.

The data entered incorrect, a message

will be prompted.

Special Requirements:

Relationships: The base case includes checking the

database case.

The base case includes retrieving data

case

Use Case: Issue Books

Introduction: This use case describes the process of

issuing a certain book for a member by

the librarian.

Actors: Librarian

Member

Pre- conditions: Member should give the member Id to

the librarian.

Books should be available to issue.

Post- conditions: Member should have the issued book.

Confirmation message should be

prompted.

Database should be updated-issued.

Member details should be updated.

Basic Flow: Get the member Id & book Id.

Check the availability.

Check number of books taken.

Issue the book.

Update the system

User Id or book Id is incorrect, user will

be prompted a message regarding the

error.

The given book is already issued prompt

a message regarding that.

User already taken 3 books prompt a

message.

Special Requirements: Borrowed books should be below 3.

Relationships: The base case includes checking the

database case.

The base case includes updating database

case

Use Case: Return Books

Introduction: This use case describes the process of

issuing a certain book for a member by

the librarian.

Actors: Librarian

Member

Pre- conditions: Librarian should be logged into the

system.

Member should be borrowed books.

Member should give the member Id to

the librarian.

Post- conditions: Library should have the returned book.

Confirmation message should be

prompted.

Database should be updated-available.

Member details should be updated.

Basic Flow: Get the member Id & book Id.

Check the Id accuracy.

Return the book.

Update the system

User Id or book Id is incorrect, user will

be prompted a message regarding the

error.

Special Requirements:

Relationships: The base case includes checking the

database case.

The base case includes updating database

case

Use Case: View Members

Introduction: To display the details, when a member,

guest or administrator wants to see the

details on the registered user.

Actors: Administrator

guest

Member

Pre- conditions: User should have the client interface.

Members should be stored in the

database & available to retrieve.

Post- conditions: User should be displayed all the

members with the complete details.

Basic Flow: Identify the user type – member, guest

or administrator

Display the member details

Print the details

Alternative Flow: User does not want to print the details,

user can ignore the step.

Special Requirements:

Relationships: The base case includes checking the

database case.

The base case includes retrieve data

case.

Use Case: Add/Remove Books

Introduction: Only librarian & administrator are

allowed to add or remove books from

the library database.

Actors: Administrator

Librarian

Pre- conditions: User should be logged into the system.

Books should be available to remove.

Book details should be available to add.

Post- conditions: Confirmation message should be

prompted upon successful add/remove.

Database should be updated.

Basic Flow: Identify the user type – librarian or

administrator

Check the action to be taken whether to

add or remove a book.

Add/remove the book

Update the database.

Alternative Flow: The books Id already available then

prompt the error.

The book Id is invalid when removing,

prompt the error.

The book is not available to remove,

prompt the error.

Special Requirements: Book should be outdated to remove it.

New books should be recognized as

standard editions.

Relationships: The base case includes checking the

database case.

The base case includes update database

case.

The base case includes get details case.

Use Case: Add/Remove Members

Introduction: Only administrator is allowed to add or

remove members from the library

database.

Actors: Administrator

Pre- conditions: Administrator should be logged into the

system.

Members should be available to remove.

Member details should be available to

add.

Post- conditions: Confirmation message should be

prompted upon successful add/remove.

Database should be updated.

Basic Flow: Check the action to be taken whether to

add or remove a member.

Add/remove the member

Update the database.

Alternative Flow: The member Id already available, then

prompt the error.

The member Id is invalid when

removing, prompt the error.

The member is not available to remove,

prompt the error.

Special Requirements: To remove a member, member should

request to leave the library.

Relationships: The base case includes checking the

database case.

The base case includes update database

case.

The base case includes get details case.

Activity Diagrams for Library Management System

Activities & Transitions in the Use Cases

1. Case : Login

Enter member Id & password.

Check both fields are filled

If not prompt a message

Clear fields

Else check whether input is correct or not

If correct display the user interface

Else prompt an error message

Clear fields

2. Case : View member Details

View details

Check whether to print details

If needs, then proceed to print step

Else exit the window.

3. Case : View Books

Check the user type

Proceed to view books page

Display the book details

Check whether to print details

If needs, proceed to print step

Else exit the window.

4. Case : Reserve Books

Check the user type.

Enter book Id & member Id

Check both fields are filled

If not prompt a message

Else check the member & book Id are correct.

If correct, reserve the book.

Confirm reservation.

Else prompt error message

Update the database.

5. Case : Search Books

Check the user type

Select the search type

Enter search data

If the data incorrect prompt the error message

Else check the availability

If available proceed to view books page

View search results

Else prompt error message

6. Case : Issue Books

Get the member Id & book Id

Check both fields are filled

If not prompt a message

Else check the member & book Id are correct.

If correct, check the availability of the book.

If not available, prompt error message.

If available, check number of books taken by the user.

If less than 3, proceed to “issue book” step

Else prompt message.

Proceed to “Update modification” step.

7. Case : Return Books

Get the member Id & book Id

Check both fields are filled

If not prompt a message

Else check the member & book Id are correct.

If correct proceed to “return the book” step

Else prompt a message regarding error

Proceed to “Update modifications” step.

8. Case : View Members

Check the user type

Proceed to view members page

Display the member details

Check whether to print details

If needs, proceed to print step

Else exit the window.

9. Case : Add/Remove books

Identify the user type

Check the action

If “add a book” step, then check the Id number availability.

If available prompt a message.

Else proceed to “add details” step

If “remove book” step, then check the validity of book Id

If not valid, prompt a message,

Else proceed to “remove book” step.

Proceed to “update modifications” step.

10. Case : Add/Remove Members

Check the action

If “add a user” step, check the Id number availability

If available prompt a message.

Else proceed to add member step

If “remove user” step, check the validity of the Id

If not valid, prompt message

Else proceed to remove member step

Proceed to “update modifications” step.

Activity diagrams for the Use Cases

1. Activity diagram for case : Login

Login

[Both not filled]

Password Member Id

Prompt error

Message

[Both filled]

[Correct inputs]

[Incorrect inputs]

Display User

interface Clear Fields

Clear Fields

Prompt error

Message

2. Activity Diagram for Case : View User Details

View user Details

[Don’t Print]

[Print Details]

Print Details

3. Activity Diagram for Case : View Books

User Type

Administrator Guest

View Books Page

Member

Display Results

[Don’t Print]

[Print Details]

Print Details

4. Activity Diagram for Case : Reserve Books

Reserve Books

[Both not filled]

Book Id Member Id

Prompt error

Message

[Both filled]

[Correct inputs]

[Incorrect inputs]

Reserve book

Clear Fields

Prompt error

Message

Confirm reservation

Update Database

5. Activity Diagram for Case : Search Books

User Type

Member Guest

Search Type

Search Data

By Name By Category

[Correct Data]

[Incorrect data]

Prompt Error Message

[Available]

[Not Available]

Prompt Error Message

View results

6. Activity diagram for Case : Issue Books

Prompt error

Message

Prompt error

Message

Issue Books

[Both not filled]

Book Id Member Id

Prompt error

Message

[Both filled]

[Correct inputs]

[Incorrect inputs]

Issue book

Clear Fields

Confirm Issue

Update Database

[Not Available]

Prompt error

Message

[Available]

[Borrowed books>3]

[Borrowed books<3]

7. Activity Diagram for Case : Return Books

Return Books

[Both not filled]

Book Id Member Id

Prompt error

Message

[Both filled]

[Correct inputs]

[Incorrect inputs]

Return book

Clear Fields

Prompt error

Message

Confirm return

Update Database

8. Activity Diagram for Case : View Members

User Type

Administrator Guest

View Member Page

Member

Display Results

[Don’t Print]

[Print Details]

Print Details

9. Activity Diagram for Case : Add/Remove Books

Error message

User Type

Librarian Administrator

Preferred Action

Add book Details

Add a Book Remove a Book

[Valid Id]

Update Modification

[Id Available]

Error message

[Not Available]

[Invalid Id]

Remove book

10. Activity Diagram for Case : Add/Remove Users

Preferred Action

Add User Details

Add a User Remove a User

[Valid Id]

Update Modification

[Id Available]

[Not Available]

[Invalid Id]

Remove User

Error message Error message

Class Diagram for Library Management System

* *

1 1

1

*

Administrator

Verifylogin()

ViewBooks()

ViewMembers()

NewBook()

RemBook()

NewUser()

RemUser()

Librarian

Verifylogin()

Reserve()

Return()

Issue()

NewBook()

RemBook()

Member

Verifylogin()

ViewBooks()

ViewMembers()

MyDetails()

Search()

Reserve()

Guest

ViewBooks()

ViewMem

Search()

Books

Reserve()

Return()

Issue()

NewBook()

RemBook()

Search()

ViewBooks()

Log

Verifylogin()