Limitations for Clerks
Clerks will execute only required fields validation for all the clerk steps. All the other validations mentioned below should be provided by the respective clerk developers:
• Valid Characters - Validate that the user has not entered any illegal characters for a given field (e.g. alpha characters in a numeric field).
• Format - Validate that the user has entered values in an expected and understandable format. Note that the UI should do as much as possible to prevent the user from entering invalid formats in the first place (e.g. clearly indicating what format is expected, allowing different formats to be entered). See the Form Standard for more information.
• Length - Validate that the user has entered a value which is neither too long nor too short for a given field.
• Uniqueness - Validate that data entered is unique with respect to existing data in the system. For example, verifying that a given part number does not already exist in the system.
In case of clerk, while navigating between steps any java code such as a validator may not get the required fields so developers need to take care and apply logic accordingly.( E.g. While creating a new document first step has required field type (means type of document), since in clerk user is free to navigate between other tabs while clicking on other tabs,user might not have selected required filed type in first step. In that case server validator can’t get value of type attribute.)