imag/libimagstore/src/error.rs

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use std::error::Error;
use std::fmt::Error as FmtError;
use std::clone::Clone;
use std::fmt::{Debug, Display, Formatter};
use std::fmt;
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use std::convert::From;
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/**
* Kind of store error
*/
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#[derive(Clone, Copy, Debug, PartialEq)]
pub enum StoreErrorKind {
FileError,
IdLocked,
IdNotFound,
OutOfMemory,
FileNotFound,
FileNotCreated,
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IoError,
StorePathExists,
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StorePathCreate,
StorePathOutsideStore,
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LockPoisoned,
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EntryAlreadyBorrowed,
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EntryAlreadyExists,
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MalformedEntry,
// maybe more
}
fn store_error_type_as_str(e: &StoreErrorKind) -> &'static str {
match e {
&StoreErrorKind::FileError => "File Error",
&StoreErrorKind::IdLocked => "ID locked",
&StoreErrorKind::IdNotFound => "ID not found",
&StoreErrorKind::OutOfMemory => "Out of Memory",
&StoreErrorKind::FileNotFound => "File corresponding to ID not found",
&StoreErrorKind::FileNotCreated => "File corresponding to ID could not be created",
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&StoreErrorKind::IoError => "File Error",
&StoreErrorKind::StorePathExists => "Store path exists",
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&StoreErrorKind::StorePathCreate => "Store path create",
&StoreErrorKind::StorePathOutsideStore => "Store path would be outside of store",
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&StoreErrorKind::LockPoisoned
=> "The internal Store Lock has been poisoned",
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&StoreErrorKind::EntryAlreadyBorrowed => "Entry is already borrowed",
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&StoreErrorKind::EntryAlreadyExists => "Entry already exists",
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&StoreErrorKind::MalformedEntry => "Entry has invalid formatting, missing header",
}
}
impl Display for StoreErrorKind {
fn fmt(&self, fmt: &mut Formatter) -> Result<(), FmtError> {
try!(write!(fmt, "{}", store_error_type_as_str(self)));
Ok(())
}
}
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/**
* Store error type
*/
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#[derive(Debug)]
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pub struct StoreError {
err_type: StoreErrorKind,
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cause: Option<Box<Error>>,
}
impl StoreError {
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/**
* Build a new StoreError from an StoreErrorKind, optionally with cause
*/
pub fn new(errtype: StoreErrorKind, cause: Option<Box<Error>>)
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-> StoreError
{
StoreError {
err_type: errtype,
cause: cause,
}
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}
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/**
* Get the error type of this StoreError
*/
pub fn err_type(&self) -> StoreErrorKind {
self.err_type.clone()
}
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}
impl Display for StoreError {
fn fmt(&self, fmt: &mut Formatter) -> Result<(), FmtError> {
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try!(write!(fmt, "[{}]", store_error_type_as_str(&self.err_type.clone())));
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Ok(())
}
}
impl Error for StoreError {
fn description(&self) -> &str {
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store_error_type_as_str(&self.err_type.clone())
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}
fn cause(&self) -> Option<&Error> {
self.cause.as_ref().map(|e| &**e)
}
}
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impl From<ParserError> for StoreError {
fn from(ps: ParserError) -> StoreError {
StoreError {
err_type: StoreErrorKind::MalformedEntry,
cause: Some(Box::new(ps)),
}
}
}
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impl From<::std::io::Error> for StoreError {
fn from(ps: ::std::io::Error) -> StoreError {
StoreError {
err_type: StoreErrorKind::IoError,
cause: Some(Box::new(ps)),
}
}
}
#[derive(Clone)]
pub enum ParserErrorKind {
TOMLParserErrors,
MissingMainSection,
MissingVersionInfo,
NonTableInBaseTable,
HeaderInconsistency,
}
pub struct ParserError {
kind: ParserErrorKind,
cause: Option<Box<Error>>,
}
impl ParserError {
pub fn new(k: ParserErrorKind, cause: Option<Box<Error>>) -> ParserError {
ParserError {
kind: k,
cause: cause,
}
}
}
impl Debug for ParserError {
fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> {
try!(write!(f, "{:?}", self.description()));
Ok(())
}
}
impl Display for ParserError {
fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> {
try!(write!(f, "{}", self.description()));
Ok(())
}
}
impl Error for ParserError {
fn description(&self) -> &str {
match self.kind {
ParserErrorKind::TOMLParserErrors => "Several TOML-Parser-Errors",
ParserErrorKind::MissingMainSection => "Missing main section",
ParserErrorKind::MissingVersionInfo => "Missing version information in main section",
ParserErrorKind::NonTableInBaseTable => "A non-table was found in the base table",
ParserErrorKind::HeaderInconsistency => "The header is inconsistent",
}
}
fn cause(&self) -> Option<&Error> {
self.cause.as_ref().map(|e| &**e)
}
}