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Advancing to the next panel during the installation can be controlled using validators.

This can be achieved by a nested <validator> definition in the panel definition in the installer descriptor:

Data Validator Example

Either Built-in validators or user-defined validators can be used. User-defined validators must in a library specified in a <jar> tag.

There can be any number of validators nested in a <panel> definition. All of the validators must evaluate to true for the final status to be true, 

If any of the unconditioned validators or those that are active by a condition fails the user is prevented from advancing to the next panel using the Next button. Instead, an error or warning message is shown.

The validator determines whether a warning or an error messagebox is shown. It also controls the message translation.

A <validator> tag takes the following attributes:

AttributeDescriptionValuesRequired
className

Fully qualified classname of an validator implementation.

This can be a built-in validator or user-defined .

Stringyes
conditionCondition for applying this validator. If this condition evaluates false, the validator is ignoredStringno
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2 Comments

  1. What happens if the va;idator evaluates to false?

    Can anyone think of a use case to add to the description?

  2. Would it be a good idea to include an example with a condition and a <jar> tag?