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// Tests for the serializer and deserializer are located in tests/serde_/mod.rs.
// They can be run with `cargo test --features serde_tests`.
use serde::ser::{MapVisitor, Serialize, Serializer as SerdeSerializer, SeqVisitor};
use {EventWriter, PlistEvent};
pub struct Serializer<W: EventWriter> {
writer: W,
}
impl<W: EventWriter> Serializer<W> {
pub fn new(writer: W) -> Serializer<W> {
Serializer { writer: writer }
}
#[inline]
fn emit(&mut self, event: PlistEvent) -> Result<(), ()> {
self.writer.write(&event)
}
pub fn into_inner(self) -> W {
self.writer
}
fn single_key_dict<F>(&mut self,
key: String,
value_fn: F)
-> Result<(), <Self as SerdeSerializer>::Error>
where F: FnOnce(&mut Serializer<W>) -> Result<(), <Self as SerdeSerializer>::Error>
{
// Emit {key: value}
try!(self.emit(PlistEvent::StartDictionary(Some(1))));
try!(self.emit(PlistEvent::StringValue(key)));
try!(value_fn(self));
try!(self.emit(PlistEvent::EndDictionary));
Ok(())
}
}
impl<W: EventWriter> SerdeSerializer for Serializer<W> {
type Error = ();
fn visit_bool(&mut self, v: bool) -> Result<(), Self::Error> {
self.emit(PlistEvent::BooleanValue(v))
}
fn visit_i64(&mut self, v: i64) -> Result<(), Self::Error> {
self.emit(PlistEvent::IntegerValue(v))
}
fn visit_u64(&mut self, v: u64) -> Result<(), Self::Error> {
self.emit(PlistEvent::IntegerValue(v as i64))
}
fn visit_f64(&mut self, v: f64) -> Result<(), Self::Error> {
self.emit(PlistEvent::RealValue(v))
}
fn visit_str(&mut self, value: &str) -> Result<(), Self::Error> {
self.emit(PlistEvent::StringValue(value.to_owned()))
}
fn visit_bytes(&mut self, value: &[u8]) -> Result<(), Self::Error> {
self.emit(PlistEvent::DataValue(value.to_owned()))
}
fn visit_unit(&mut self) -> Result<(), Self::Error> {
// Emit empty string
self.emit(PlistEvent::StringValue(String::new()))
}
fn visit_none(&mut self) -> Result<(), Self::Error> {
self.single_key_dict("None".to_owned(), |this| this.visit_unit())
}
fn visit_some<V>(&mut self, value: V) -> Result<(), Self::Error>
where V: Serialize
{
self.single_key_dict("Some".to_owned(), |this| value.serialize(this))
}
fn visit_seq<V>(&mut self, mut visitor: V) -> Result<(), Self::Error>
where V: SeqVisitor
{
let len = visitor.len().map(|len| len as u64);
try!(self.emit(PlistEvent::StartArray(len)));
loop {
match try!(visitor.visit(self)) {
Some(()) => (),
None => break,
}
}
try!(self.emit(PlistEvent::EndArray));
Ok(())
}
fn visit_seq_elt<T>(&mut self, value: T) -> Result<(), Self::Error>
where T: Serialize
{
value.serialize(self)
}
fn visit_map<V>(&mut self, mut visitor: V) -> Result<(), Self::Error>
where V: MapVisitor
{
let len = visitor.len().map(|len| len as u64);
try!(self.emit(PlistEvent::StartDictionary(len)));
loop {
match try!(visitor.visit(self)) {
Some(()) => (),
None => break,
}
}
try!(self.emit(PlistEvent::EndDictionary));
Ok(())
}
fn visit_map_elt<K, V>(&mut self, key: K, value: V) -> Result<(), Self::Error>
where K: Serialize,
V: Serialize
{
try!(key.serialize(self));
try!(value.serialize(self));
Ok(())
}
fn visit_unit_variant(&mut self,
_name: &'static str,
_variant_index: usize,
variant: &'static str)
-> Result<(), Self::Error> {
self.single_key_dict(variant.to_owned(), |this| this.visit_unit())
}
fn visit_newtype_struct<T>(&mut self, _name: &'static str, value: T) -> Result<(), Self::Error>
where T: Serialize
{
value.serialize(self)
}
fn visit_newtype_variant<T>(&mut self,
_name: &'static str,
_variant_index: usize,
variant: &'static str,
value: T)
-> Result<(), Self::Error>
where T: Serialize
{
self.single_key_dict(variant.to_owned(), |this| value.serialize(this))
}
fn visit_tuple_variant<V>(&mut self,
_name: &'static str,
_variant_index: usize,
variant: &'static str,
visitor: V)
-> Result<(), Self::Error>
where V: SeqVisitor
{
self.single_key_dict(variant.to_owned(),
|this| this.visit_tuple_struct(variant, visitor))
}
fn visit_struct_variant<V>(&mut self,
_name: &'static str,
_variant_index: usize,
variant: &'static str,
visitor: V)
-> Result<(), Self::Error>
where V: MapVisitor
{
self.single_key_dict(variant.to_owned(),
|this| this.visit_struct(variant, visitor))
}
}
|
