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| ArticlesPPT's presented at Ruia college in TechStorm |
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Knowledge Engineering |
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The Real World |
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Understanding the Real World |
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Capturing Knowledge |
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Computational Models |
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Representation Suitable for Computers |
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| ArticlesObject Oriented Programming Pros & Cons 2 |
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Knowledge Engineer |
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The greatest joy is joy of creation, yes we create programs |
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The joy is in giving. Yes we give our intelligence to our program. Our knowledge our intelligence is captured in our program. |
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| ArticlesObject Oriented Programming Pros & Cons 3 |
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Stages in Engineering |
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Understanding Requirements |
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Visualizing a Solution |
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Implementing the Solution |
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| ArticlesObject Oriented Programming Pros & Cons 4 |
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Impact of unit of Construction Problem Solving |
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A Brick? |
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A Wall? |
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A Room? |
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A Floor? |
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| ArticlesObject Oriented Programming Pros & Cons 5 |
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Computational Models |
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Procedural |
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Object Oriented |
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Database |
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Event Driven |
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Aspect Oriented |
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Subject Oriented |
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Filter Based |
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Meta Programming |
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| ArticlesObject Oriented Programming Pros & Cons 6 |
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Building Blocks |
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Op-codes |
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Structures like loops and conditional statements |
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Variables |
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Fuctions / Procedures |
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Objects |
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Components |
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Tables |
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Queries |
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Aspects |
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Design Patterns |
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As the solution grows more complex larger unit of constructions are more suitable |
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| ArticlesObject Oriented Programming Pros & Cons 7 |
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Piggy Bank |
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A piggy bank houses coins |
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Coins can be inserted in the piggy bank |
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Coins can be removed from piggy bank |
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There are several piggy banks so each one has be given a unique ID |
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| ArticlesObject Oriented Programming Pros & Cons 8 |
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C Program |
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struct PiggyBank {
int id;
int balance;
int lasttransaction;
};
struct PiggyBank p1, p2, p3;
p1, p2, p3 represents three PiggyBanks.
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| ArticlesObject Oriented Programming Pros & Cons 9 |
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C Program specific to P1 |
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void deposit (int amount) {
p1.balance = p1.balance + amount;
p1.lasttransaction = amount;
}
void withdraw (int amount) {
int temp;
temp = p1.balance - amount;
if( temp >= 0) {
p1.balance = p1.balance - amount;
p1.lasttransaction = -amount;
}
}
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| ArticlesObject Oriented Programming Pros & Cons 10 |
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C Program Generalized |
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void deposit ( struct PiggyBank *p, int amount) {
p->balance = p->balance + amount;
p->lasttransaction = amount;
}
void withdraw ( struct PiggyBank *p, int amount) {
int temp;
temp = p->balance - amount;
if( temp >= 0) {
p->balance = p->balance - amount;
p->lasttransaction = -amount;
}
}
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| ArticlesObject Oriented Programming Pros & Cons 11 |
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Listing Elements |
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Structure |
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State |
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Common Behavior |
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| ArticlesObject Oriented Programming Pros & Cons 12 |
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Problems with Procedural Models |
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Variables can be manipulated by any functions |
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We cannot associate behavior with structure |
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State being open can be manipulated by any functions |
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| ArticlesObject Oriented Programming Pros & Cons 13 |
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Data Base |
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Create Table PiggyBank |
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| Id |
Balance |
Last Transaction |
| 01 |
3000 |
252 |
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| ArticlesObject Oriented Programming Pros & Cons 14 |
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Data Base |
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Each row in PigggyBank table represents PiggyBank |
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To model the withdraw and deposit actions we will have to use the update statement |
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A check constraint on balance column will ensure that the balance is >= 0 |
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| ArticlesObject Oriented Programming Pros & Cons 15 |
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Class |
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Layout |
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Message |
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Behavior |
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| ArticlesObject Oriented Programming Pros & Cons 16 |
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Class PiggyBank |
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Class PiggyBank {
int id;
int balance;
int lasttransaction;
void deposit(int amount) {
balance = balance + amount;
lasttransaction = amount;
}
void withdraw(int amount) {
int temp = balance - amount;
if (temp >= 0){
balance = balance + amount;
lasttransaction = -amount;
}
}
}
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| ArticlesObject Oriented Programming Pros & Cons 17 |
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Instance ( state ) |
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PiggyBank a = new PiggyBank(); |
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| ArticlesObject Oriented Programming Pros & Cons 18 |
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Procedural v/s Object Oriented |
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Variables have ability of Knowing |
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Procedures have ability of Doing |
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Objects have Knowing and Doing ability |
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| ArticlesObject Oriented Programming Pros & Cons 19 |
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Whole > sum of parts |
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Quantum Physics |
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The components |
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The system |
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The Alchemy of patterns |
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The Systemic View (Outside the Box) |
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The Component View (inside the Box) |
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| ArticlesObject Oriented Programming Pros & Cons 20 |
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Object |
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Unit of Responsibilty |
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Conversion is possible between knowing and doing. What remains invariant is the responsibility. |
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| ArticlesObject Oriented Programming Pros & Cons 21 |
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Object |
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State |
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Structure |
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Messages |
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Behavior |
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| ArticlesObject Oriented Programming Pros & Cons 22 |
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Object Advantage |
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Encapsulates state and behavior |
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Unit of responsibility |
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Data Hiding |
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Change Management |
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Messages |
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| ArticlesObject Oriented Programming Pros & Cons 23 |
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Limitations |
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Adding print functionality |
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 Issues in Procedural Model |
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Issues in Database Model |
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Issues in Object Model |
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| ArticlesObject Oriented Programming Pros & Cons 24 |
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The Future Trends |
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Component Based Programming will Thrive |
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Aspect Oriented Programming |
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Mobile Agents |
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Design Patterns will take center stage |
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