Avoid Exposing Collections Directly as Properties: ASP Alliance

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Avoid Exposing Collections Directly as Properties

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by Steven Smith
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Doing It Wrong

Doing it the simplest way that could possibly work would mean simply exposing the internal state of the Customer class by creating a public field of List<Order>. The listing below shows what this might look like, and a couple of tests that show the required functionality (and currently pass):

At first glance, this appears to solve the requirements of the system. Now let's add a few more tests to reveal the weaknesses in this approach, and refactor it to improve things.

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User Comments

Title: Picture links all broken (404)
Name: Anonymous
Date: 2012-12-12 8:46:55 AM
Comment:
The images are blank and result in a 404 if opened individually.

Title: Very nice
Name: Thanigainathan
Date: 2011-03-28 2:36:03 PM
Comment:
Hi,

The article is very nice. So you mean only the parent of the list property can modify its state. Will this be sort of restricting the features of collections ?

Thanks,
Thani