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module com { module sun { module star { module form { module validation {
interface XValidityConstraintListener;
/** specifies a component able to validate (the content of) other components
<p>Validators support simple validity checks and retrieving justifications for
invalidity.</p>
<p>Validators may additionally support dynamic validity constraints. In such a case,
the validity of a given value may change, without the value changing itself.<br/>
To be notified about this, interested components should register as XValidityConstraintLis
tener.
@see XValidatable
*/
interface XValidator : com::sun::star::uno::XInterface
{
/** determines whether the given value is valid
@param Value
the value to check for validity
@return
`TRUE` if and only if the value is considered valid.
*/
boolean isValid( [in] any Value );
/** retrieves a justification for the invalidity of the given value
@param Value
the value which has been recognized as being invalid
@return
a human-readable string, which explains why the given value is considered invalid.
*/
string explainInvalid( [in] any Value );
/** registers the given validity listener.
<p>Usually, an XValidatable instance will also add itself as validity listener,
as soon as the validator is introduced to it.</p>
<p>Implementations which do not support dynamic validity constraints should simply ignore this
call.</p>
@throws com::sun::star::lang::NullPointerException
if the given listener is `NULL`
@see XValidityConstraintListener
*/
void addValidityConstraintListener( [in] XValidityConstraintListener Listener )
raises( com::sun::star::lang::NullPointerException );
/** revokes the given validity listener
@throws com::sun::star::lang::NullPointerException
if the given listener is `NULL`
@see XValidityConstraintListener
*/
void removeValidityConstraintListener( [in] XValidityConstraintListener Listener )
raises( com::sun::star::lang::NullPointerException );
};
}; }; }; }; };
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