ADF Business Component Validations

بسم الله الرحمن الرحيم

اللهم علمنا ما ينفعنا وانفعنا بما علمتنا يا رب العالمين

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This framework provides very good feature of validation. In ADF we can validate user inputs at different levels. Which are

• Attribute level: Fires on value change.
• Entity level: Fires on moving from one record to another. 
• Transaction level: Fires after attribute and entity level validations are complete. It validates Master-detail validations.

These validations are defined in Entity object and View object level. There are many rules of possible validations and ADF-BC provide lots of them. These validations rules are: 

• Compare: Attribute value compared with other attribute's value or an expression or a literal.
• List: Value is validated against a list of values.
• Key Exists: Its like a foreign key validator, it checks the value whether it exists or not. Like value for employee will check for the department to check whether it is present or not.
• Regular Expressions: Value compared against provided regular expression. Like for email validation, Number Format validation.
• Script Expression: Groovy expression are used to do validations.
• Method Validator: When a method validator is created it adds a method in corresponding entityImpl calss. Like 

         public boolean validateEname(String ename) {

         return true;

        }    

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