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Make defensive copies

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Defensive copying involves making copies of objects passed into methods to prevent the caller from modifying the internal state of the object. It is not needed when objects are explicitly handed off in a constructor or when copying is too expensive, such as with model objects like those used by Hibernate.

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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
Make defensive copies
Make defensive copies
Make defensive copies
Make defensive copies
Make defensive copies
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
  • 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