Book Image

Object-Oriented Programming in ColdFusion

By : Matthew Gifford
Book Image

Object-Oriented Programming in ColdFusion

By: Matthew Gifford

Overview of this book

Are you tired of procedural programming or is your extensive code base starting to become un-manageable? Breathe some new life into your code and improve your development skills with the basic concepts of object-oriented programming. Utilize objects, modular components, and design patterns to expand your skills and improve your ColdFusion applications. Packed with example code, and written in a friendly, easy-to-read style, this book is just what you need if you are serious about ColdFusion.This book is a fast-paced tutorial to important ColdFusion object-oriented programming topics. It will give you clear, concise, and practical guidance to take you from the basics of ColdFusion to the skills that will make you a ColdFusion developer to be reckoned with. Don't be put off by jargon or complex diagrams; read and see how you can benefit from this book and extend your development skills in the process.Using the practical examples within this guide, you will learn how to structure your applications and code, applying the fundamental basics of object-oriented programming to develop modular, reusable components that will scale easily with your application. You will learn the basic fundamental practices of object-oriented programming, from object creation and re-use, to Bean objects, service layers, Data Access objects, and sample design patterns to gain a better understanding of OOP using examples that can be altered and applied in your application. Complete with detailed code samples and snippets, and written in a friendly easy-to-follow style, you will be able to break free from writing purely procedural code and enhance your applications by building structured applications utilizing basic design patterns and object-oriented principles.
Table of Contents (14 chapters)
Object-Oriented Programming in ColdFusion
Credits
Foreword
About the Author
Acknowledgement
About the Reviewer
Preface

Polymorphism


Polymorphism is another important concept in the world of object-oriented programming, and is relatively simple to understand.

Polymorphism occurs as a side effect of inheritance. Essentially, it means that you can treat a child object and its inherited methods and properties in exactly the same way you would treat the parent object's methods and properties.

Consider the following code example, in which we output the name property of each product using the objects we have instantiated in Listing 4.4.

<cfoutput>
Book Name: #objBook.getName()#<br />
DVD Name: #objDVD.getName()#
</cfoutput>

Listing 4.5 Displaying each product name

All of our child objects inherited the getName() method from within our parent object, the Product Base class. In the previous code example, each child object calls the same inherited method, but returns a different result for each call.

Essentially, this means that the inherited method is polymorphic, as it behaves in exactly the same...