Introduction

Overview

Flowers

Learning Objectives

• List the preferred characteristics of an object-oriented application architecture

• State the definition of the Liskov Substitution Principle (LSP)

• State the definition of Bertrand Meyer’s Design by Contract programming (DbC)

• Describe the close relationship between the Liskov Substitution Principle and Design by Contract

• State the purpose of method preconditions and postconditions

• State the purpose of class invariants

• Describe the effects weakening and strengthening preconditions have on subclass behavior

• Describe the effects weakening and strengthening postconditions have on subclass behavior

• State the purpose and use of the open-closed principle

• State the purpose and use of the dependency inversion principle

• Describe the characteristics of bad software architecture

• Demonstrate your ability to use the three design principles in your programming projects