MeiliSearch/meilisearch-core/src/serde/convert_to_string.rs
2020-03-31 14:01:44 +01:00

257 lines
6.6 KiB
Rust

use serde::ser;
use serde::Serialize;
use super::SerializerError;
pub struct ConvertToString;
impl ser::Serializer for ConvertToString {
type Ok = String;
type Error = SerializerError;
type SerializeSeq = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTuple = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTupleStruct = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTupleVariant = ser::Impossible<Self::Ok, Self::Error>;
type SerializeMap = MapConvertToString;
type SerializeStruct = StructConvertToString;
type SerializeStructVariant = ser::Impossible<Self::Ok, Self::Error>;
fn serialize_bool(self, value: bool) -> Result<Self::Ok, Self::Error> {
Ok(value.to_string())
}
fn serialize_char(self, value: char) -> Result<Self::Ok, Self::Error> {
Ok(value.to_string())
}
fn serialize_i8(self, value: i8) -> Result<Self::Ok, Self::Error> {
Ok(value.to_string())
}
fn serialize_i16(self, value: i16) -> Result<Self::Ok, Self::Error> {
Ok(value.to_string())
}
fn serialize_i32(self, value: i32) -> Result<Self::Ok, Self::Error> {
Ok(value.to_string())
}
fn serialize_i64(self, value: i64) -> Result<Self::Ok, Self::Error> {
Ok(value.to_string())
}
fn serialize_u8(self, value: u8) -> Result<Self::Ok, Self::Error> {
Ok(value.to_string())
}
fn serialize_u16(self, value: u16) -> Result<Self::Ok, Self::Error> {
Ok(value.to_string())
}
fn serialize_u32(self, value: u32) -> Result<Self::Ok, Self::Error> {
Ok(value.to_string())
}
fn serialize_u64(self, value: u64) -> Result<Self::Ok, Self::Error> {
Ok(value.to_string())
}
fn serialize_f32(self, value: f32) -> Result<Self::Ok, Self::Error> {
Ok(value.to_string())
}
fn serialize_f64(self, value: f64) -> Result<Self::Ok, Self::Error> {
Ok(value.to_string())
}
fn serialize_str(self, value: &str) -> Result<Self::Ok, Self::Error> {
Ok(value.to_string())
}
fn serialize_bytes(self, _v: &[u8]) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType { type_name: "&[u8]" })
}
fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType {
type_name: "Option",
})
}
fn serialize_some<T: ?Sized>(self, _value: &T) -> Result<Self::Ok, Self::Error>
where
T: Serialize,
{
Err(SerializerError::UnserializableType {
type_name: "Option",
})
}
fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
Ok(String::new())
}
fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType {
type_name: "unit struct",
})
}
fn serialize_unit_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
) -> Result<Self::Ok, Self::Error> {
Err(SerializerError::UnserializableType {
type_name: "unit variant",
})
}
fn serialize_newtype_struct<T: ?Sized>(
self,
_name: &'static str,
value: &T,
) -> Result<Self::Ok, Self::Error>
where
T: Serialize,
{
value.serialize(self)
}
fn serialize_newtype_variant<T: ?Sized>(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_value: &T,
) -> Result<Self::Ok, Self::Error>
where
T: Serialize,
{
Err(SerializerError::UnserializableType {
type_name: "newtype variant",
})
}
fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
Err(SerializerError::UnserializableType {
type_name: "sequence",
})
}
fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
Err(SerializerError::UnserializableType { type_name: "tuple" })
}
fn serialize_tuple_struct(
self,
_name: &'static str,
_len: usize,
) -> Result<Self::SerializeTupleStruct, Self::Error> {
Err(SerializerError::UnserializableType {
type_name: "tuple struct",
})
}
fn serialize_tuple_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize,
) -> Result<Self::SerializeTupleVariant, Self::Error> {
Err(SerializerError::UnserializableType {
type_name: "tuple variant",
})
}
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
Ok(MapConvertToString {
text: String::new(),
})
}
fn serialize_struct(
self,
_name: &'static str,
_len: usize,
) -> Result<Self::SerializeStruct, Self::Error> {
Ok(StructConvertToString {
text: String::new(),
})
}
fn serialize_struct_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize,
) -> Result<Self::SerializeStructVariant, Self::Error> {
Err(SerializerError::UnserializableType {
type_name: "struct variant",
})
}
}
pub struct MapConvertToString {
text: String,
}
impl ser::SerializeMap for MapConvertToString {
type Ok = String;
type Error = SerializerError;
fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<(), Self::Error>
where
T: ser::Serialize,
{
let text = key.serialize(ConvertToString)?;
self.text.push_str(&text);
self.text.push_str(" ");
Ok(())
}
fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
where
T: ser::Serialize,
{
let text = value.serialize(ConvertToString)?;
self.text.push_str(&text);
Ok(())
}
fn end(self) -> Result<Self::Ok, Self::Error> {
Ok(self.text)
}
}
pub struct StructConvertToString {
text: String,
}
impl ser::SerializeStruct for StructConvertToString {
type Ok = String;
type Error = SerializerError;
fn serialize_field<T: ?Sized>(
&mut self,
key: &'static str,
value: &T,
) -> Result<(), Self::Error>
where
T: ser::Serialize,
{
let value = value.serialize(ConvertToString)?;
self.text.push_str(key);
self.text.push_str(" ");
self.text.push_str(&value);
Ok(())
}
fn end(self) -> Result<Self::Ok, Self::Error> {
Ok(self.text)
}
}