org.nakedobjects.metamodel.facets.object.validate
Interface ValidateObjectFacet

All Superinterfaces:

Facet, InteractionAdvisor, InteractionAdvisorFacet, ValidatingInteractionAdvisor

All Known Implementing Classes:

ValidateObjectFacetAbstract, ValidateObjectFacetViaValidateMethod

public interface ValidateObjectFacet
extends Facet, ValidatingInteractionAdvisor

Mechanism for determining whether this object is in a valid state, for example so that it can be persisted or updated.

Even though all the properties of an object may themselves be valid, there could be inter-property dependencies which are invalid. For example fromDate > toDate would probably represent an invalid state.

In the standard Naked Objects Programming Model, typically corresponds to the validate method.

See Also:

PersistingCallbackFacet, UpdatingCallbackFacet

Field Summary

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

NOOP

Method Summary

java.lang.String

invalidReason(NakedObject nakedObject) The reason the object 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 nakedObject)

The reason the object is invalid.

. If the object is actually valid, should return null.