Validate Me (original) (raw)
Jeff McDonald deep.blue.6802 at gmail.com
Mon Feb 20 11:07:17 PST 2012
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As part of the App kernel frameworks discussion Richard has discussed the need for a validation frameworks. I'm breaking out the discussion on validation because the topic is broad enough to benefit from a focused discussion.
My random thoughts:
All of Java can benefit from validation, and not just JavaFX. Where should a validation frameworks fit into the Java ecosystem?
Thinking about validation there are two categories that I can think of (1)passive validation - this is the most obvious. A users types in a value and submits it and validation is performed and either the input is bad or it's good. (2) active validation - input is evaluated and validated during the input process. As an example: Let's say you have a field that accepts an email address. With passive validation the user could be informed that they entered an invalid email address. In an active validation system the field could restrict the user from entering invalid characters or stop accepting input once a maximum size is reached.
JavaFX can benefit from both passive and active forms of validation. The important question becomes how to implement validation into the UI. Where to place the hooks and response behavior in the UI code.
What things work great in existing validation frameworks? What sucks?
What libraries do you use? Why did you pick that library?
What is missing from existing validation frameworks?
Cheers, Jeff
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