quickfix_spec_parser/model/
field_spec.rs

1use std::io;
2
3use quick_xml::events::BytesStart;
4
5use crate::{
6    parse_xml_list, read_attribute, write_xml_list, FieldAllowedValue, FieldType, FixSpecError,
7    XmlObject, XmlReadable, XmlReader, XmlWritable, XmlWriter,
8};
9
10/// XML `<field>` description.
11#[derive(Debug, Clone)]
12pub struct FieldSpec {
13    /// FIX technical tag number.
14    pub number: u32,
15    /// FIX dictionary tag name.
16    pub name: String,
17    /// Value type.
18    pub r#type: FieldType,
19    /// Possible values in case there is a restricted list.
20    pub values: Vec<FieldAllowedValue>,
21}
22
23impl XmlObject for FieldSpec {
24    const TAG_NAME: &'static str = "field";
25}
26
27impl XmlReadable for FieldSpec {
28    fn parse_xml_node(element: &BytesStart) -> Result<Self, FixSpecError> {
29        let number = read_attribute(element, "number")?.parse()?;
30        let name = read_attribute(element, "name")?;
31        let r#type = read_attribute(element, "type")?.parse()?;
32
33        Ok(Self {
34            number,
35            name,
36            r#type,
37            values: Vec::new(),
38        })
39    }
40
41    fn parse_xml_tree(element: &BytesStart, reader: &mut XmlReader) -> Result<Self, FixSpecError> {
42        let mut output = Self::parse_xml_node(element)?;
43        output.values = parse_xml_list(reader, Self::TAG_NAME)?;
44        Ok(output)
45    }
46}
47
48impl XmlWritable for FieldSpec {
49    fn write_xml<'a>(&self, writer: &'a mut XmlWriter) -> io::Result<&'a mut XmlWriter> {
50        let element = writer
51            .create_element(Self::TAG_NAME)
52            .with_attribute(("number", self.number.to_string().as_str()))
53            .with_attribute(("name", self.name.as_str()))
54            .with_attribute(("type", self.r#type.as_static_str()));
55
56        if self.values.is_empty() {
57            element.write_empty()
58        } else {
59            element.write_inner_content(|writer| write_xml_list(writer, &self.values))
60        }
61    }
62}
quickfix_spec_parser/model/field_spec.rs

quickfix_spec_parser/model/
field_spec.rs
