91 lines
2.0 KiB
Rust
91 lines
2.0 KiB
Rust
use std::error::Error;
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use std::fmt::Error as FmtError;
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use std::fmt::{Display, Formatter};
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#[derive(Clone, Copy, Debug, PartialEq)]
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pub enum LinkErrorKind {
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EntryHeaderReadError,
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EntryHeaderWriteError,
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ExistingLinkTypeWrong,
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LinkTargetDoesNotExist,
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InternalConversionError,
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InvalidUri,
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StoreReadError,
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StoreWriteError,
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}
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fn link_error_type_as_str(e: &LinkErrorKind) -> &'static str {
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match *e {
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LinkErrorKind::EntryHeaderReadError
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=> "Error while reading an entry header",
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LinkErrorKind::EntryHeaderWriteError
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=> "Error while writing an entry header",
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LinkErrorKind::ExistingLinkTypeWrong
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=> "Existing link entry has wrong type",
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LinkErrorKind::LinkTargetDoesNotExist
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=> "Link target does not exist in the store",
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LinkErrorKind::InternalConversionError
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=> "Error while converting values internally",
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LinkErrorKind::InvalidUri
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=> "URI is not valid",
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LinkErrorKind::StoreReadError
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=> "Store read error",
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LinkErrorKind::StoreWriteError
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=> "Store write error",
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}
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}
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impl Display for LinkErrorKind {
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fn fmt(&self, fmt: &mut Formatter) -> Result<(), FmtError> {
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try!(write!(fmt, "{}", link_error_type_as_str(self)));
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Ok(())
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}
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}
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#[derive(Debug)]
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pub struct LinkError {
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kind: LinkErrorKind,
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cause: Option<Box<Error>>,
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}
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impl LinkError {
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pub fn new(errtype: LinkErrorKind, cause: Option<Box<Error>>) -> LinkError {
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LinkError {
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kind: errtype,
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cause: cause,
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}
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}
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}
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impl Display for LinkError {
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fn fmt(&self, fmt: &mut Formatter) -> Result<(), FmtError> {
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try!(write!(fmt, "[{}]", link_error_type_as_str(&self.kind)));
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Ok(())
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}
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}
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impl Error for LinkError {
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fn description(&self) -> &str {
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link_error_type_as_str(&self.kind)
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}
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fn cause(&self) -> Option<&Error> {
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self.cause.as_ref().map(|e| &**e)
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}
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}
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