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use std::error::Error;
use std::fmt::Error as FmtError;
use std::clone::Clone;
use std::fmt::{Display, Formatter};
/**
* Kind of error
*/
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum NoteErrorKind {
StoreWriteError,
StoreReadError,
HeaderTypeError,
NoteToEntryConversion,
// Nothing here yet
}
fn note_error_type_as_str(e: &NoteErrorKind) -> &'static str {
match e {
&NoteErrorKind::StoreWriteError => "Error writing store",
&NoteErrorKind::StoreReadError => "Error reading store",
&NoteErrorKind::HeaderTypeError => "Header type error",
&NoteErrorKind::NoteToEntryConversion => "Error converting Note instance to Entry instance",
}
}
impl Display for NoteErrorKind {
fn fmt(&self, fmt: &mut Formatter) -> Result<(), FmtError> {
try!(write!(fmt, "{}", note_error_type_as_str(self)));
Ok(())
}
}
/**
* Store error type
*/
#[derive(Debug)]
pub struct NoteError {
err_type: NoteErrorKind,
cause: Option<Box<Error>>,
}
impl NoteError {
/**
* Build a new NoteError from an NoteErrorKind, optionally with cause
*/
pub fn new(errtype: NoteErrorKind, cause: Option<Box<Error>>) -> NoteError {
NoteError {
err_type: errtype,
cause: cause,
}
}
/**
* Get the error type of this NoteError
*/
pub fn err_type(&self) -> NoteErrorKind {
self.err_type.clone()
}
}
impl Display for NoteError {
fn fmt(&self, fmt: &mut Formatter) -> Result<(), FmtError> {
try!(write!(fmt, "[{}]", note_error_type_as_str(&self.err_type.clone())));
Ok(())
}
}
impl Error for NoteError {
fn description(&self) -> &str {
note_error_type_as_str(&self.err_type.clone())
}
fn cause(&self) -> Option<&Error> {
self.cause.as_ref().map(|e| &**e)
}
}
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