bosonnlp 0.1.2

BosonNLP SDK for Rust
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use std::fmt;
use std::error;
use std::io;

use hyper::Error as HTTPError;
use hyper::status::StatusCode;
use rustc_serialize::json::{DecoderError, EncoderError};


/// BosonNLP API 错误类型
#[derive(Debug)]
pub enum Error {
    /// 编码错误
    Encoding(EncoderError),
    /// 解码错误
    Decoding(DecoderError),
    /// I/O 错误
    Io(io::Error),
    /// HTTP 请求错误
    Http(HTTPError),
    /// API 错误
    Api {
        code: StatusCode,
        reason: String,
    },
    /// 聚类任务未找到
    TaskNotFound {
        /// 聚类任务 ID
        task_id: String,
    },
    /// 聚类任务超时
    Timeout {
        /// 聚类任务 ID
        task_id: String,
    },
}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match *self {
            Error::Encoding(ref err) => err.fmt(f),
            Error::Decoding(ref err) => err.fmt(f),
            Error::Io(ref err) => err.fmt(f),
            Error::Http(ref err) => err.fmt(f),
            Error::Api { code, ref reason } => write!(f, "API error, code {}, reason {}", code, reason),
            Error::TaskNotFound { ref task_id } => write!(f, "cluster {} not found", task_id),
            Error::Timeout { ref task_id } => write!(f, "cluster {} timed out", task_id),
        }
    }
}

impl error::Error for Error {
    fn description(&self) -> &str {
        match *self {
            Error::Encoding(ref err) => err.description(),
            Error::Decoding(ref err) => err.description(),
            Error::Io(ref err) => err.description(),
            Error::Http(ref err) => err.description(),
            Error::Api { ref reason, .. } => reason,
            Error::TaskNotFound { .. } => "cluster task not found",
            Error::Timeout { .. } => "cluster task timed out",
        }
    }
}

impl From<DecoderError> for Error {
    fn from(error: DecoderError) -> Error {
        Error::Decoding(error)
    }
}

impl From<EncoderError> for Error {
    fn from(error: EncoderError) -> Error {
        Error::Encoding(error)
    }
}

impl From<io::Error> for Error {
    fn from(err: io::Error) -> Error {
        Error::Io(err)
    }
}

impl From<HTTPError> for Error {
    fn from(err: HTTPError) -> Error {
        Error::Http(err)
    }
}