Algo-Web / ODataMetadata

        $association->addToEnd($dependentEnd);

        $principalReferralConstraint = null;

        $dependentReferralConstraint = null;

        if (null != $principalConstraintProperty && 0 < count($principalConstraintProperty)) {

            $principalReferralConstraint = new TReferentialConstraintRoleElementType();

            $principalReferralConstraint->setRole($principalNavigationProperty->getFromRole());

            foreach ($principalConstraintProperty as $propertyRef) {

                $principalReferralConstraint->addToPropertyRef($propertyRef);

            }

        }

        if (null != $dependentConstraintProperty && 0 < count($dependentConstraintProperty)) {

            $dependentReferralConstraint = new TReferentialConstraintRoleElementType();

            $dependentReferralConstraint->setRole($dependentNavigationProperty->getFromRole());

                $principalReferralConstraint->addToPropertyRef($propertyRef);

            }

        }

        if (null != $dependentConstraintProperty && 0 < count($dependentConstraintProperty)) {

            $dependentReferralConstraint = new TReferentialConstraintRoleElementType();

            $dependentReferralConstraint->setRole($dependentNavigationProperty->getFromRole());

            foreach ($dependentConstraintProperty as $propertyRef) {

                $dependentReferralConstraint->addToPropertyRef($propertyRef);

            }

        }

        if (null != $dependentReferralConstraint || null != $principalReferralConstraint) {

            $constraint = new TConstraintType();