use std::any::Any;
use std::any::TypeId;
use std::fmt;
use std::io::Read;
use std::io::Write;
#[cfg(feature = "bytes")]
use bytes::Bytes;
use clear::Clear;
use reflect::MessageDescriptor;
use unknown::UnknownFields;
use stream::WithCodedInputStream;
use stream::WithCodedOutputStream;
use stream::CodedInputStream;
use stream::CodedOutputStream;
use stream::with_coded_output_stream_to_bytes;
use error::ProtobufError;
use error::ProtobufResult;
pub trait Message: fmt::Debug + Clear + Any + Send + Sync {
fn descriptor(&self) -> &'static MessageDescriptor;
fn is_initialized(&self) -> bool;
fn merge_from(&mut self, is: &mut CodedInputStream) -> ProtobufResult<()>;
fn write_to_with_cached_sizes(&self, os: &mut CodedOutputStream) -> ProtobufResult<()>;
fn compute_size(&self) -> u32;
fn get_cached_size(&self) -> u32;
fn write_to(&self, os: &mut CodedOutputStream) -> ProtobufResult<()> {
self.check_initialized()?;
self.compute_size();
self.write_to_with_cached_sizes(os)?;
Ok(())
}
fn write_length_delimited_to(&self, os: &mut CodedOutputStream) -> ProtobufResult<()> {
let size = self.compute_size();
os.write_raw_varint32(size)?;
self.write_to_with_cached_sizes(os)?;
Ok(())
}
fn write_length_delimited_to_vec(&self, vec: &mut Vec<u8>) -> ProtobufResult<()> {
let mut os = CodedOutputStream::vec(vec);
self.write_length_delimited_to(&mut os)?;
os.flush()?;
Ok(())
}
fn merge_from_bytes(&mut self, bytes: &[u8]) -> ProtobufResult<()> {
let mut is = CodedInputStream::from_bytes(bytes);
self.merge_from(&mut is)
}
fn check_initialized(&self) -> ProtobufResult<()> {
if !self.is_initialized() {
Err(ProtobufError::message_not_initialized(self.descriptor().name()))
} else {
Ok(())
}
}
fn write_to_writer(&self, w: &mut Write) -> ProtobufResult<()> {
w.with_coded_output_stream(|os| self.write_to(os))
}
fn write_to_vec(&self, v: &mut Vec<u8>) -> ProtobufResult<()> {
v.with_coded_output_stream(|os| self.write_to(os))
}
fn write_to_bytes(&self) -> ProtobufResult<Vec<u8>> {
self.check_initialized()?;
let size = self.compute_size() as usize;
let mut v = Vec::with_capacity(size);
unsafe {
v.set_len(size);
}
{
let mut os = CodedOutputStream::bytes(&mut v);
self.write_to_with_cached_sizes(&mut os)?;
os.check_eof();
}
Ok(v)
}
fn write_length_delimited_to_writer(&self, w: &mut Write) -> ProtobufResult<()> {
w.with_coded_output_stream(|os| self.write_length_delimited_to(os))
}
fn write_length_delimited_to_bytes(&self) -> ProtobufResult<Vec<u8>> {
with_coded_output_stream_to_bytes(|os| self.write_length_delimited_to(os))
}
fn get_unknown_fields<'s>(&'s self) -> &'s UnknownFields;
fn mut_unknown_fields<'s>(&'s mut self) -> &'s mut UnknownFields;
fn type_id(&self) -> TypeId {
TypeId::of::<Self>()
}
fn as_any(&self) -> &Any;
fn as_any_mut(&mut self) -> &mut Any {
panic!()
}
fn into_any(self: Box<Self>) -> Box<Any> {
panic!()
}
fn new() -> Self where Self : Sized;
fn descriptor_static() -> &'static MessageDescriptor
where Self : Sized
{
panic!(
"descriptor_static is not implemented for message, \
LITE_RUNTIME must be used"
);
}
fn default_instance() -> &'static Self
where Self : Sized;
}
pub fn message_down_cast<'a, M : Message + 'a>(m: &'a Message) -> &'a M {
m.as_any().downcast_ref::<M>().unwrap()
}
pub fn parse_from<M : Message>(is: &mut CodedInputStream) -> ProtobufResult<M> {
let mut r: M = Message::new();
r.merge_from(is)?;
r.check_initialized()?;
Ok(r)
}
pub fn parse_from_reader<M : Message>(reader: &mut Read) -> ProtobufResult<M> {
reader.with_coded_input_stream(|is| parse_from::<M>(is))
}
pub fn parse_from_bytes<M : Message>(bytes: &[u8]) -> ProtobufResult<M> {
bytes.with_coded_input_stream(|is| parse_from::<M>(is))
}
#[cfg(feature = "bytes")]
pub fn parse_from_carllerche_bytes<M : Message>(
bytes: &Bytes,
) -> ProtobufResult<M> {
WithCodedInputStream::with_coded_input_stream(bytes, |is| parse_from::<M>(is))
}
#[deprecated]
pub fn parse_length_delimited_from<M : Message>(
is: &mut CodedInputStream,
) -> ProtobufResult<M> {
is.read_message::<M>()
}
#[deprecated]
pub fn parse_length_delimited_from_reader<M : Message>(
r: &mut Read,
) -> ProtobufResult<M> {
r.with_coded_input_stream(|is| is.read_message::<M>())
}
#[deprecated]
pub fn parse_length_delimited_from_bytes<M : Message>(
bytes: &[u8],
) -> ProtobufResult<M> {
bytes.with_coded_input_stream(|is| is.read_message::<M>())
}