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Groovy 2 Cookbook

You're reading from   Groovy 2 Cookbook Java and Groovy go together like ham and eggs, and this book is a great opportunity to learn how to exploit Groovy 2 to the full. Packed with recipes, both intermediate and advanced, it's a great way to speed up and modernize your programming.

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Product type Paperback
Published in Oct 2013
Publisher Packt
ISBN-13 9781849519366
Length 394 pages
Edition 1st Edition
Languages
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Authors (2):
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Luciano Fiandesio Luciano Fiandesio
Author Profile Icon Luciano Fiandesio
Luciano Fiandesio
Andrey Adamovich Andrey Adamovich
Author Profile Icon Andrey Adamovich
Andrey Adamovich
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Table of Contents (17) Chapters Close

Groovy 2 Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
1. Getting Started with Groovy 2. Using Groovy Ecosystem FREE CHAPTER 3. Using Groovy Language Features 4. Working with Files in Groovy 5. Working with XML in Groovy 6. Working with JSON in Groovy 7. Working with Databases in Groovy 8. Working with Web Services in Groovy 9. Metaprogramming and DSLs in Groovy 10. Concurrent Programming in Groovy Index

Adding the cloning functionality to Groovy Beans


There are several strategies to clone an object in Java. To clone an object means the ability to create an object with the same state as the original object.

A widely used strategy to clone an object is for the class to be cloned to implement the Cloneable interface, and implement a method, clone, in which the cloning code is executed. Naturally, Groovy supports this semantic but makes it even easier to implement with the @AutoClone annotation, which will be demonstrated in this recipe.

How to do it...

The following steps will show the power of the @AutoClone annotation:

  1. Let's define an object Vehicle and annotate the class with the @AutoClone annotation:

    import groovy.transform.AutoClone
    
    @AutoClone 
      class Vehicle {
      String brand
      String type
      Long wheelsNumber
    }
  2. In the same script where the Vehicle object is defined, add the following code:

    def v1 = new Vehicle()
    v1.brand = 'Ferrari'
    v1.type = 'Testarossa'
    v1.wheelsNumber = 4
    def v2 = v1.clone...
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