as3io / modlr

                throw MetadataException::invalidMetadata($metadata->type, sprintf('The data type "%s" for attribute "%s" is invalid', $attribute->dataType, $attribute->key));

            }

            if ($metadata instanceof EntityMetadata && true === $metadata->isChildEntity()) {

                $parent = $mf->getMetadataForType($metadata->extends);

                if ($parent->hasAttribute($attribute->key)) {

                    throw MetadataException::invalidMetadata($metadata->type, sprintf('Parent entity type "%s" already contains attribute field "%s"', $parent->type, $attribute->key));

                }

            }

            if (true === $attribute->isCalculated()) {

                if (false === class_exists($attribute->calculated['class']) || false === method_exists($attribute->calculated['class'], $attribute->calculated['method'])) {

            if (false === $this->isFieldKeyValid($relationship->key)) {

                throw MetadataException::invalidMetadata($metadata->type, sprintf('The relationship key "%s" is invalid based on the configured name format "%s"', $relationship->key, $this->config->getFieldKeyFormat()));

            }

            if (true === $metadata->isChildEntity()) {

                $parent = $mf->getMetadataForType($metadata->extends);

                if ($parent->hasRelationship($relationship->key)) {

                    throw MetadataException::invalidMetadata($metadata->type, sprintf('Parent entity type "%s" already contains relationship field "%s"', $parent->type, $relationship->key));

                }

            }

            if (false === $this->isEntityTypeValid($relationship->entityType)) {

                throw MetadataException::invalidMetadata($metadata->type, sprintf('The related model "%s" for relationship "%s" is invalid based on the configured name format "%s"', $relationship->entityType, $relationship->key, $this->config->getEntityFormat()));

            }