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Introduce a function to transform an obk into a JSON

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Clément Renault 2020-11-05 13:34:15 +01:00
parent b220885f42
commit c94bc59d7e
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1 changed files with 20 additions and 0 deletions
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src/lib.rs
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@ -14,7 +14,9 @@ use std::borrow::Cow;
use std::collections::HashMap; use std::collections::HashMap;
use std::hash::BuildHasherDefault; use std::hash::BuildHasherDefault;
use anyhow::Context;
use fxhash::{FxHasher32, FxHasher64}; use fxhash::{FxHasher32, FxHasher64};
use serde_json::{Map, Value};
pub use self::criterion::{Criterion, default_criteria}; pub use self::criterion::{Criterion, default_criteria};
pub use self::fields_ids_map::FieldsIdsMap; pub use self::fields_ids_map::FieldsIdsMap;
@ -38,3 +40,21 @@ pub type Attribute = u32;
pub type Position = u32; pub type Position = u32;
type MergeFn = for<'a> fn(&[u8], &[Cow<'a, [u8]>]) -> anyhow::Result<Vec<u8>>; type MergeFn = for<'a> fn(&[u8], &[Cow<'a, [u8]>]) -> anyhow::Result<Vec<u8>>;
/// Transform a raw obkv store into a JSON Object.
pub fn obkv_to_json(
displayed_fields: &[u8],
fields_ids_map: &FieldsIdsMap,
obkv: obkv::KvReader,
) -> anyhow::Result<Map<String, Value>>
{
displayed_fields.iter()
.copied()
.flat_map(|id| obkv.get(id).map(|value| (id, value)))
.map(|(id, value)| {
let name = fields_ids_map.name(id).context("unknown obkv field id")?;
let value = serde_json::from_slice(value)?;
Ok((name.to_owned(), value))
})
.collect()
}