org.nakedobjects.metamodel.facets.properties.validate
Interface PropertyValidateFacet

All Superinterfaces:

Facet, InteractionAdvisor, InteractionAdvisorFacet, ValidatingInteractionAdvisor

All Known Implementing Classes:

PropertyValidateFacetAbstract, PropertyValidateFacetDefault, PropertyValidateFacetNone, PropertyValidateFacetViaMethod

public interface PropertyValidateFacet
extends Facet, ValidatingInteractionAdvisor

The mechanism by which the proposed value of a property can be validated, called immediately before setting the value.

In the standard Naked Objects Programming Model, corresponds to invoking the validateXxx method for a property with an accessor of getXxx.

See Also:

PropertySetterFacet

Field Summary

Fields inherited from interface org.nakedobjects.metamodel.consent.InteractionAdvisorFacet

NOOP

Method Summary

java.lang.String

invalidReason(NakedObject targetObject, NakedObject proposedValue) The reason why the proposed value is invalid.

Methods inherited from interface org.nakedobjects.metamodel.interactions.ValidatingInteractionAdvisor

invalidates

Methods inherited from interface org.nakedobjects.metamodel.facets.Facet

alwaysReplace, facetType, getFacetHolder, getUnderlyingFacet, isDerived, isNoop, setFacetHolder, setUnderlyingFacet

Method Detail

invalidReason

java.lang.String invalidReason(NakedObject targetObject,
                               NakedObject proposedValue)

The reason why the proposed value is invalid.

Should return null if the value is in fact valid.