lxdb-engine 0.1.0

Lazy semantic token and relation queries over LXDB datasets.
Documentation 
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use lxdb_core::ids::TokenId;
use lxdb_format::{AdjacencyRecord, RelationRecord, TokenRecord};
use lxdb_storage::BinaryDataset;

use crate::{
    AdjacencyRecordIter, BinaryTokenIter, DatasetQuery, EngineError, RecordIter,
    RelationRecordIter, TokenRecordIter, relation::outgoing_relations,
};

pub trait BinaryDatasetExt {
    fn tokens(&self) -> TokenRecordIter<'_>;

    fn relations(&self) -> RelationRecordIter<'_>;

    fn adjacency(&self) -> AdjacencyRecordIter<'_>;

    fn resolved_tokens(&self) -> BinaryTokenIter<'_>;

    fn outgoing(&self, token_id: TokenId) -> Result<RelationRecordIter<'_>, EngineError>;

    fn query(&self) -> DatasetQuery<'_>;
}

impl BinaryDatasetExt for BinaryDataset {
    fn tokens(&self) -> TokenRecordIter<'_> {
        RecordIter::<TokenRecord>::new(self.token_records())
    }

    fn relations(&self) -> RelationRecordIter<'_> {
        RecordIter::<RelationRecord>::new(self.relation_records())
    }

    fn adjacency(&self) -> AdjacencyRecordIter<'_> {
        RecordIter::<AdjacencyRecord>::new(self.adjacency_records())
    }

    fn resolved_tokens(&self) -> BinaryTokenIter<'_> {
        BinaryTokenIter::new(self.tokens(), self.token_string_table())
    }

    fn outgoing(&self, token_id: TokenId) -> Result<RelationRecordIter<'_>, EngineError> {
        outgoing_relations(self, token_id)
    }

    fn query(&self) -> DatasetQuery<'_> {
        DatasetQuery::new(self)
    }
}