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StorageBackend::iter_ids() return Result<> with StorageBackendError on error

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Matthias Beyer 2015-12-04 14:02:30 +01:00
parent d4cb51486b
commit 3df106ce8b
1 changed files with 16 additions and 8 deletions
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24
src/storage/backend.rs
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@ -72,15 +72,23 @@ impl StorageBackend {
} }
} }
pub fn iter_ids(&self, m: &Module) -> Option<IntoIter<FileID>> pub fn iter_ids(&self, m: &Module) -> Result<IntoIter<FileID>, StorageBackendError>
{ {
glob(&self.prefix_of_files_for_module(m)[..]).and_then(|globlist| { glob(&self.prefix_of_files_for_module(m)[..])
let v = globlist.filter_map(Result::ok) .and_then(|globlist| {
.map(|pbuf| FileID::from(&pbuf)) let v = globlist.filter_map(Result::ok)
.collect::<Vec<FileID>>() .map(|pbuf| FileID::from(&pbuf))
.into_iter(); .collect::<Vec<FileID>>()
Ok(v) .into_iter();
}).ok() Ok(v)
})
.map_err(|e| {
let serr = StorageBackendError::build(
"iter_ids()",
"Cannot iter on file ids",
None);
serr
})
} }
pub fn iter_files<'a, HP>(&self, m: &'a Module, p: &Parser<HP>) pub fn iter_files<'a, HP>(&self, m: &'a Module, p: &Parser<HP>)