The Conversion and Validation Process

• The user fills in a field of a web form.

• User clicks submit button, sending form data as a string to the server. This is the request value.

• Request values are stored in UIComponent objects as submitted values.

• Submitted values are converted to Java types required by the application and stored in the component objects as local values.

• Local values are validated for correctness (for example, integer range or string length).

• After validation, local values are stored in the appropriate beans.