70 lines
1.8 KiB
Rust
70 lines
1.8 KiB
Rust
|
pub use std::path::Path;
|
||
|
|
pub use std::fs::File;
|
||
|
|
|
||
|
|
pub use runtime::Runtime;
|
||
|
|
pub use error::ImagError;
|
||
|
|
pub use error::ImagErrorBase;
|
||
|
|
|
||
|
|
pub struct StorageError {
|
||
|
|
base : ImagErrorBase,
|
||
|
|
backendname : String,
|
||
|
|
}
|
||
|
|
|
||
|
|
impl StorageError {
|
||
|
|
|
||
|
|
pub fn new<T : StorageBackend>(backend : &T, short: String, long: String) -> StorageError {
|
||
|
|
StorageError {
|
||
|
|
base: ImagErrorBase {
|
||
|
|
shortdesc: short,
|
||
|
|
longdesc: long,
|
||
|
|
},
|
||
|
|
backendname: backend.name()
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
impl<'a> ImagError<'a> for StorageError {
|
||
|
|
|
||
|
|
fn print(&self, rt: &Runtime) {
|
||
|
|
if self.base.longdesc.is_empty() {
|
||
|
|
let s = format!("Backend {}: {}\n\n{}\n\n",
|
||
|
|
self.backendname,
|
||
|
|
self.base.shortdesc,
|
||
|
|
self.base.longdesc);
|
||
|
|
rt.print(&s)
|
||
|
|
} else {
|
||
|
|
let s = format!("Backend {}: {}\n",
|
||
|
|
self.backendname,
|
||
|
|
self.base.shortdesc);
|
||
|
|
rt.print(&s)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
fn print_short(&self, rt : &Runtime) {
|
||
|
|
let s = format!("Backend {}: {}\n",
|
||
|
|
self.backendname,
|
||
|
|
self.base.shortdesc);
|
||
|
|
rt.print(&s)
|
||
|
|
}
|
||
|
|
|
||
|
|
fn print_long(&self, rt : &Runtime) {
|
||
|
|
let s = format!("Backend {}: {}\n\n{}\n\n",
|
||
|
|
self.backendname,
|
||
|
|
self.base.shortdesc,
|
||
|
|
self.base.longdesc);
|
||
|
|
rt.print(&s)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
pub trait StorageBackend {
|
||
|
|
|
||
|
|
fn name(&self) -> String;
|
||
|
|
|
||
|
|
fn create(&self, file : File) -> Option<StorageError>;
|
||
|
|
fn read(&self, path: Path) -> Result<File, StorageError>;
|
||
|
|
fn update(&self, file : File) -> Option<StorageError>;
|
||
|
|
fn destroy(&self, path: Path) -> Option<StorageError>;
|
||
|
|
|
||
|
|
}
|