Data validation

The validation tag is responsible for performing basic checks regarding mandatory attributes and valid attribute values before being submitted to the persistence handler. The validation tag may contain one or more attribute-validation and script-validation tags. The verification will be performed before running the insert or update handler.

attribute-validator contains the following attributes:

attribute-script contains a script that will be executed to validate the business object.

Example:

<datanode name="country">
    <validation>
        <attribute-validation expr=”${instance.abbrevisation}”
                notNull=”true” friendlyName=”Two letter abbrv.”>
        <script-validation>
            if (instance.abbreviaton.equals(“CT”))
            {
                throw new RuntimeException (“Catalonia is not a country yet”);
            }
        </script-validation>
    </validation>
        ...
</datanode>