fn parse_fixed()

in avro/src/schema.rs [1985:2036]
44 lines of code
6 McCabe index (conditional complexity)

    fn parse_fixed(
        &mut self,
        complex: &Map<String, Value>,
        enclosing_namespace: &Namespace,
    ) -> AvroResult<Schema> {
        let size_opt = complex.get("size");
        if size_opt.is_none() {
            if let Some(seen) = self.get_already_seen_schema(complex, enclosing_namespace) {
                return Ok(seen.clone());
            }
        }

        let doc = complex.get("doc").and_then(|v| match &v {
            Value::String(ref docstr) => Some(docstr.clone()),
            _ => None,
        });

        let size = match size_opt {
            Some(size) => size
                .as_u64()
                .ok_or_else(|| Error::GetFixedSizeFieldPositive(size.clone())),
            None => Err(Error::GetFixedSizeField),
        }?;

        let default = complex.get("default").and_then(|v| match &v {
            Value::String(ref default) => Some(default.clone()),
            _ => None,
        });

        if default.is_some() {
            let len = default.clone().unwrap().len();
            if len != size as usize {
                return Err(Error::FixedDefaultLenSizeMismatch(len, size));
            }
        }

        let fully_qualified_name = Name::parse(complex, enclosing_namespace)?;
        let aliases = fix_aliases_namespace(complex.aliases(), &fully_qualified_name.namespace);

        let schema = Schema::Fixed(FixedSchema {
            name: fully_qualified_name.clone(),
            aliases: aliases.clone(),
            doc,
            size: size as usize,
            default,
            attributes: self.get_custom_attributes(complex, vec!["size"]),
        });

        self.register_parsed_schema(&fully_qualified_name, &schema, &aliases);

        Ok(schema)
    }