Make defensive copies

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This presentation explains why and how we should make defensive copies of method parameters in Java.

Technology News & Politics

Make Defensive Copies

Parag Shah

http://www.diycomputerscience.com

Even though Java is a safe language, it is still
possible for programmers to make safe mistakes
and destroy the invariants of an object

When to not make defensive

When a collaborator is doing an explicit hand-off
of the object in the constructor
When it is very expensive to make copies
Model objects... eg: Hibernate pojo's

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Make defensive copies

1. Make Defensive Copies Parag Shah http://www.diycomputerscience.com

2. Even though Java is a safe language, it is still possible for programmers to make safe mistakes and destroy the invariants of an object

3.

4.

5.

6.

7.

8. When to not make defensive When a collaborator is doing an explicit hand-off of the object in the constructor When it is very expensive to make copies Model objects... eg: Hibernate pojo's