EJB best practices: The fine points of data validation - The Diigo Meta page

• 25 Apr 08
  

  jmbeas

  • Types of data validation

     The first step to figuring out where to place your validation code is knowing what type of validation you're dealing with. Data-format validation ensures that all data types (integers, floating point numbers, strings, and so on) are correct. It also confirms that variables are within the range of allowed values and that patterns match as they should. Data-format validation essentially deals with any aspect of validation that doesn't require the application of specific business rules.

      

    Do you know the difference?  The ability to clearly distinguish between the two types of data validation is critical to good application design. Deliberate or unintentional mixing of the two types of validation can result in horribly architected classes and inefficient application performance.

      

    Business-specific validation is based on a set of business rules (for example, ensuring that a supplied ISBN number matches an actual book in your database). It almost always requires access to the EJB layer, as well as other business-logic components in your application.
• 02 Nov 07
  

  Bill H

  function_placement

  • Data-format validation ensures that all data types (integers, floating  point numbers, strings, and so on) are correct. It also confirms that variables  are within the range of allowed values and that patterns match as they should.  Data-format validation essentially deals with any aspect of validation that  doesn't require the application of specific business rules.

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