There can be defined conditions, for which a change to the next panel in the installation wizard is allowed.
This can be achieved by a nested definition into the panel definition od the installer descriptor:
There can be used built-in or user-defined data validators.
There can be any number of validators nested to a <panel> definition. All of them must validate successfully (or their condition must evaluate false) to allow a final success and thus a panel change from the according panel.
<validator> tag takes the following attributes:
Fully qualified classname of an Validator implementation.
This can be a built-in validator or one from additional libraries in the <jar> tag.
|Condition for applying this validator. If this condition evaluates false, the according validator is ignored||String||no|