2016-02-15 20:27:51 +00:00
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use storeid::StoreId;
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use store::FileLockEntry;
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use self::error::HookError;
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pub type HookResult = Result<(), HookError>;
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2016-02-16 11:21:37 +00:00
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pub trait Hook : Eq + PartialEq + Debug + Display {
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2016-02-15 20:27:51 +00:00
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fn dependencies(&self) -> Vec<Box<Hook>>;
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}
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pub trait StoreIdHook : Hook {
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fn execute(&self, &StoreId) -> HookResult;
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}
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pub trait FileLockHook : Hook {
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fn execute(&self, &StoreId, &FileLockEntry) -> HookResult;
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}
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pub mod read {
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use super::FileLockHook;
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use super::StoreIdHook;
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pub trait PreReadHook : StoreIdHook {
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}
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pub trait PostReadHook : FileLockHook {
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}
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}
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pub mod create {
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use super::FileLockHook;
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use super::StoreIdHook;
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pub trait PreCreateHook : StoreIdHook {
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}
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pub trait PostCreateHook : FileLockHook {
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}
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}
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pub mod retrieve {
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use super::FileLockHook;
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use super::StoreIdHook;
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pub trait PreRetrieveHook : StoreIdHook {
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}
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pub trait PostRetrieveHook : FileLockHook {
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}
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}
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pub mod delete {
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use super::StoreIdHook;
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pub trait PreDeleteHook : StoreIdHook {
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}
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pub trait PostDeleteHook : StoreIdHook {
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}
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}
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pub mod error {
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use std::error::Error;
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use std::fmt::Error as FmtError;
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use std::clone::Clone;
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use std::fmt::{Display, Formatter};
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/**
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* Kind of error
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*/
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#[derive(Clone, Copy, Debug, PartialEq)]
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pub enum HookErrorKind {
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// ...
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}
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fn hook_error_type_as_str(e: &HookErrorKind) -> &'static str {
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match e {
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_ => "",
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}
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}
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impl Display for HookErrorKind {
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fn fmt(&self, fmt: &mut Formatter) -> Result<(), FmtError> {
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try!(write!(fmt, "{}", hook_error_type_as_str(self)));
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Ok(())
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}
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}
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/**
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* Error type
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*/
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#[derive(Debug)]
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pub struct HookError {
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err_type: HookErrorKind,
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cause: Option<Box<Error>>,
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}
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impl HookError {
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/**
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* Build a new HookError from an HookErrorKind, optionally with cause
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*/
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pub fn new(errtype: HookErrorKind, cause: Option<Box<Error>>)
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-> HookError
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{
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HookError {
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err_type: errtype,
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cause: cause,
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}
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}
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/**
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* Get the error type of this HookError
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*/
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pub fn err_type(&self) -> HookErrorKind {
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self.err_type.clone()
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}
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}
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impl Display for HookError {
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fn fmt(&self, fmt: &mut Formatter) -> Result<(), FmtError> {
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try!(write!(fmt, "[{}]", hook_error_type_as_str(&self.err_type.clone())));
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Ok(())
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}
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}
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impl Error for HookError {
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fn description(&self) -> &str {
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hook_error_type_as_str(&self.err_type.clone())
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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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}
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