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use fmt;
use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
use Uuid;
impl Serialize for Uuid {
fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
if serializer.is_human_readable() {
serializer.collect_str(&self.hyphenated())
} else {
serializer.serialize_bytes(self.as_bytes())
}
}
}
impl<'de> Deserialize<'de> for Uuid {
fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
if deserializer.is_human_readable() {
struct UuidStringVisitor;
impl<'vi> de::Visitor<'vi> for UuidStringVisitor {
type Value = Uuid;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
write!(formatter, "a UUID string")
}
fn visit_str<E: de::Error>(self, value: &str) -> Result<Uuid, E> {
value.parse::<Uuid>().map_err(E::custom)
}
fn visit_bytes<E: de::Error>(self, value: &[u8]) -> Result<Uuid, E> {
Uuid::from_bytes(value).map_err(E::custom)
}
}
deserializer.deserialize_str(UuidStringVisitor)
} else {
struct UuidBytesVisitor;
impl<'vi> de::Visitor<'vi> for UuidBytesVisitor {
type Value = Uuid;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
write!(formatter, "bytes")
}
fn visit_bytes<E: de::Error>(self, value: &[u8]) -> Result<Uuid, E> {
Uuid::from_bytes(value).map_err(E::custom)
}
}
deserializer.deserialize_bytes(UuidBytesVisitor)
}
}
}
#[cfg(test)]
mod tests {
extern crate serde_test;
use self::serde_test::{assert_tokens, Configure, Token};
use Uuid;
#[test]
fn test_serialize_readable() {
let uuid_str = "f9168c5e-ceb2-4faa-b6bf-329bf39fa1e4";
let u = Uuid::parse_str(uuid_str).unwrap();
assert_tokens(&u.readable(), &[Token::Str(uuid_str)]);
}
#[test]
fn test_serialize_compact() {
let uuid_bytes = b"F9168C5E-CEB2-4F";
let u = Uuid::from_bytes(uuid_bytes).unwrap();
assert_tokens(&u.compact(), &[Token::Bytes(uuid_bytes)]);
}
}