validate

        protected function tStructure_internal_isAcceptable($__fieldName, $__value)
        {
            $typePassed = $this->tStructure_internal_handleValueType($__fieldName, $__value);

            if(FALSE === $typePassed)
                throw new ValueExpectedException([
                    'class'     => get_called_class(),
                    'name'      => $__fieldName,
                    'expected'  => implode(', ', $this->__tStructure_MemberProperties[$__fieldName][Prop::TYPE]),
                    'typeof'    => ValueExpectedException::getType($__value)
                ]);

            // blacklisting overwrites whitelisting
            $blackPassed = $this->tStructure_internal_handleBlacklist($__fieldName, $__value);
            $whitePassed = $this->tStructure_internal_handleWhitelist($__fieldName, $__value);

            // whitelisting overwrites blacklisting
            if(TRUE === ((Flag::EXPECT_WHITELIST & $this->__tStructure_MemberProperties[$__fieldName][Prop::FLAG]) === Flag::EXPECT_WHITELIST))
                if(FALSE === $blackPassed && TRUE === $whitePassed)
                    $blackPassed = TRUE;

            if(FALSE === $blackPassed)
                throw new ValueComparisonBlacklistException([
                    'class'     => get_called_class(),
                    'name'      => $__fieldName
                ]);

            if(FALSE === $whitePassed)
                throw new ValueComparisonWhitelistException([
                    'class'     => get_called_class(),
                    'name'      => $__fieldName
                ]);

            // additional compare-function
            try
            {
                $this->tStructure_internal_handleComperation($__fieldName, $__value);
            }
            catch(\Exception $E)
            {
                throw new ValueComparisonException([
                    'class'     => get_called_class(),
                    'name'      => $__fieldName
                ], $E);
            }

            return $typePassed && $whitePassed && $blackPassed;
        }