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use quick_xml::{events::Event, Writer};
use crate::error::ParseError;
use crate::util::{ReaderExt, WriterExt};
use crate::{Error, Result};
use super::{ValueDeserializer, ValueSerializer};
#[doc(hidden)]
pub struct SeqSerializer<'a, W>
where
W: std::io::Write,
{
writer: &'a mut Writer<W>,
}
impl<'a, W> SeqSerializer<'a, W>
where
W: std::io::Write,
{
pub fn new(writer: &'a mut Writer<W>) -> Result<Self> {
let ret = SeqSerializer { writer };
ret.writer.write_start_tag(b"value")?;
ret.writer.write_start_tag(b"array")?;
ret.writer.write_start_tag(b"data")?;
Ok(ret)
}
}
impl<'a, W> serde::ser::SerializeSeq for SeqSerializer<'a, W>
where
W: std::io::Write,
{
type Ok = ();
type Error = Error;
fn serialize_element<T>(&mut self, value: &T) -> Result<()>
where
T: ?Sized + serde::Serialize,
{
value.serialize(ValueSerializer::new(&mut self.writer))
}
fn end(self) -> Result<Self::Ok> {
self.writer.write_end_tag(b"data")?;
self.writer.write_end_tag(b"array")?;
self.writer.write_end_tag(b"value")?;
Ok(())
}
}
impl<'a, W> serde::ser::SerializeTuple for SeqSerializer<'a, W>
where
W: std::io::Write,
{
type Ok = ();
type Error = Error;
fn serialize_element<T>(&mut self, value: &T) -> Result<()>
where
T: ?Sized + serde::Serialize,
{
serde::ser::SerializeSeq::serialize_element(self, value)
}
fn end(self) -> Result<Self::Ok> {
serde::ser::SerializeSeq::end(self)
}
}
impl<'a, W> serde::ser::SerializeTupleStruct for SeqSerializer<'a, W>
where
W: std::io::Write,
{
type Ok = ();
type Error = Error;
fn serialize_field<T>(&mut self, value: &T) -> Result<()>
where
T: ?Sized + serde::Serialize,
{
serde::ser::SerializeSeq::serialize_element(self, value)
}
fn end(self) -> Result<Self::Ok> {
serde::ser::SerializeSeq::end(self)
}
}
impl<'a, W> serde::ser::SerializeTupleVariant for SeqSerializer<'a, W>
where
W: std::io::Write,
{
type Ok = ();
type Error = Error;
fn serialize_field<T>(&mut self, value: &T) -> Result<()>
where
T: ?Sized + serde::Serialize,
{
serde::ser::SerializeSeq::serialize_element(self, value)
}
fn end(self) -> Result<Self::Ok> {
serde::ser::SerializeSeq::end(self)
}
}
#[doc(hidden)]
pub struct SeqDeserializer<'a, R>
where
R: std::io::BufRead,
{
inner: &'a mut ValueDeserializer<R>,
buf: Vec<u8>,
end: &'a [u8],
end_maybe: Option<&'a [u8]>,
}
impl<'a, R> SeqDeserializer<'a, R>
where
R: std::io::BufRead,
{
pub fn new(
inner: &'a mut ValueDeserializer<R>,
end: &'a [u8],
end_maybe: Option<&'a [u8]>,
) -> Result<Self> {
let mut ret = SeqDeserializer {
inner,
buf: Vec::new(),
end,
end_maybe,
};
ret.inner.reader.expect_tag(ret.end, &mut ret.buf)?;
Ok(ret)
}
}
impl<'de, 'a, R> serde::de::SeqAccess<'de> for SeqDeserializer<'a, R>
where
R: std::io::BufRead,
{
type Error = Error;
fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>>
where
T: serde::de::DeserializeSeed<'de>,
{
match self.inner.reader.read_event(&mut self.buf) {
Ok(Event::End(ref e)) if e.name() == self.end => {
if let Some(end) = self.end_maybe {
self.inner
.reader
.read_to_end(end, &mut self.buf)
.map_err(ParseError::from)?;
}
Ok(None)
}
Ok(Event::Start(ref e)) if e.name() == b"value" => {
Ok(Some(seed.deserialize(&mut *self.inner)?))
}
Ok(_) => Err(ParseError::UnexpectedEvent("one of value".to_string()).into()),
Err(e) => Err(ParseError::from(e).into()),
}
}
}
|
