Crate serde_roxmltree

Crate serde_roxmltree 

Source
Expand description

Convert roxmltree documents into [serde]-compatible types

Owned types can be deserialized directly from XML text using from_str:

use serde::Deserialize;
use serde_roxmltree::from_str;

#[derive(Deserialize)]
struct Record {
    field: String,
}

let record = from_str::<Record>("<record><field>foobar</field></record>")?;
assert_eq!(record.field, "foobar");

Borrowing types must be deserialized from a Document using from_doc:

use roxmltree::Document;
use serde::Deserialize;
use serde_roxmltree::from_doc;

#[derive(Deserialize)]
struct Record<'a> {
    field: &'a str,
}

let document = Document::parse("<document><field>foobar</field></document>")?;

let record = from_doc::<Record>(&document)?;
assert_eq!(record.field, "foobar");

Subtrees can be captured from the source by enabling the raw-node feature and using the RawNode type.

Fields of structures map to child elements and attributes:

use serde::Deserialize;
use serde_roxmltree::from_str;

#[derive(Deserialize)]
struct Record {
    child: String,
    attribute: i32,
}

let record = from_str::<Record>(r#"<record attribute="42"><child>foobar</child></record>"#)?;
assert_eq!(record.child, "foobar");
assert_eq!(record.attribute, 42);

Sequences collect repeated child elements:

use serde::Deserialize;
use serde_roxmltree::from_str;

#[derive(Deserialize)]
struct Record {
    field: Vec<String>,
}

let record = from_str::<Record>("<record><field>foo</field><field>bar</field></record>")?;
assert_eq!(record.field, ["foo", "bar"]);

Enum variants describe alternatives:

use serde::Deserialize;
use serde_roxmltree::from_str;

#[derive(Debug, PartialEq, Deserialize)]
#[serde(rename_all = "lowercase")]
enum Record {
    Float(f32),
    Integer(i32),
}

let record = from_str::<Record>("<record><float>42.0</float></record>")?;
assert_eq!(record, Record::Float(42.0));

let record = from_str::<Record>("<record><integer>23</integer></record>")?;
assert_eq!(record, Record::Integer(23));

The reserved name #content is used to flatten one level of the hierarchy and revisit those nodes and attributes as if embedded inside another struct. This can useful to handle inner text:

use serde::Deserialize;
use serde_roxmltree::from_str;

#[derive(Deserialize)]
struct Record {
    child: Child,
}

#[derive(Deserialize)]
struct Child {
    #[serde(rename = "#content")]
    text: String,
    attribute: i32,
}

let record = from_str::<Record>(r#"<record><child attribute="42">foobar</child></record>"#)?;
assert_eq!(record.child.text, "foobar");
assert_eq!(record.child.attribute, 42);

or partial alternatives:

use serde::Deserialize;
use serde_roxmltree::from_str;

#[derive(Debug, PartialEq, Deserialize)]
#[serde(rename_all = "lowercase")]
enum Alternative {
    Float(f32),
    Integer(i32),
}

#[derive(Debug, PartialEq, Deserialize)]
struct Record {
    #[serde(rename = "#content")]
    alternative: Alternative,
    string: String,
}

let record = from_str::<Record>("<record><float>42.0</float><string>foo</string></record>")?;
assert_eq!(record.alternative, Alternative::Float(42.0));
assert_eq!(record.string, "foo");

let record = from_str::<Record>("<record><integer>23</integer><string>bar</string></record>")?;
assert_eq!(record.alternative, Alternative::Integer(23));
assert_eq!(record.string, "bar");

Optionally, attribute names can be prefixed by @ to distinguish them from tag names:

use serde::Deserialize;
use serde_roxmltree::{defaults, from_str, Options};

#[derive(Deserialize)]
struct Record {
    child: String,
    #[serde(rename = "@attribute")]
    attribute: i32,
}

let record = defaults().prefix_attr().from_str::<Record>(r#"<record attribute="42"><child>foobar</child></record>"#)?;
assert_eq!(record.child, "foobar");
assert_eq!(record.attribute, 42);

Support for namespaces can be enabled via the namespaces option:

use serde::Deserialize;
use serde_roxmltree::{defaults, from_str, Options};

let text = r#"<record xmlns:foo="http://foo" xmlns:bar="http://bar">
    <foo:qux>23</foo:qux>
    <bar:qux>42</bar:qux>
</record>"#;

#[derive(Deserialize)]
struct SomeRecord {
    qux: Vec<i32>,
}

let record = from_str::<SomeRecord>(text)?;
assert_eq!(record.qux, [23, 42]);

#[derive(Deserialize)]
struct AnotherRecord {
    #[serde(rename = "{http://foo}qux")]
    some_qux: i32,
    #[serde(rename = "{http://bar}qux")]
    another_qux: i32,
}

let record = defaults().namespaces().from_str::<AnotherRecord>(text)?;
assert_eq!(record.some_qux, 23);
assert_eq!(record.another_qux, 42);

Re-exports§

pub use roxmltree;

Structs§

RawNode
Captures subtrees from the source

Enums§

Error
Possible errors when converting roxmltree documents to [serde]-compatible types

Traits§

Options
Types that represent a set of options

Functions§

defaults
The default set of options
from_doc
Deserialize an instance of type T from a roxmltree::Document
from_node
Deserialize an instance of type T from a roxmltree::Node
from_str
Deserialize an instance of type T directly from XML text