Package com.orchestranetworks.schema

Interface ConstraintOnNull

  • All Superinterfaces:
    JavaBeanVersion
    public interface ConstraintOnNull
extends JavaBeanVersion
    Defines a verification for values that are mandatory under certain circumstances.

    Data model definition and life cycle

    Any implementation of this interface must also implement the Constraint interface. As such, its data model declaration and its life cycle are the same as Constraint.

    Restriction policy

    As this interface serves as a restriction of the static data model constraint minOccurs, the method checkNull(ValueContextForValidation) is only called under the following conditions:

    Data model definition Perform checkNull()
    minOccurs="0" and maxOccurs="1" If no value is defined (null) and the dataset is activated
    minOccurs > 0 No
    maxOccurs > 1 No

    NOTE: By default, constraints on null value are not checked on user input. In order to enable this check, the osd:checkNullInput property must be set and if the element is terminal, the dataset must also be activated.

    See Also:
    Constraint, JavaBeanVersion.getBeanVersion()

    • Method Detail

      • checkNull

        void checkNull​(ValueContextForValidation aValidationContext)
        throws InvalidSchemaException
        This method performs a check when no value is defined; adds error message if necessary.
        Parameters:
        aValidationContext - the context
        Throws:
        InvalidSchemaException - if a dynamic condition in the data model prevents the execution of this method.