48 lines
1.5 KiB
Rust
48 lines
1.5 KiB
Rust
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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use bloom::Bloom;
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use config::Config;
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use database::BloomDatabase;
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use position::Position;
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use group::position::Manager as PositionManager;
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use super::BloomGroupDatabase;
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/// Bridge between `BloomDatabase` and `BloomGroupDatabase`.
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pub struct GroupDatabaseBridge<'a> {
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positioner: PositionManager,
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db: &'a BloomGroupDatabase,
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}
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impl<'a> GroupDatabaseBridge<'a> {
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pub fn new(config: Config, db: &'a BloomGroupDatabase) -> Self {
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let positioner = PositionManager::new(config.elements_per_index);
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GroupDatabaseBridge {
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positioner: positioner,
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db: db,
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}
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}
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}
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impl<'a> BloomDatabase for GroupDatabaseBridge<'a> {
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fn bloom_at(&self, position: &Position) -> Option<Bloom> {
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let position = self.positioner.position(position);
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self.db.blooms_at(&position.group)
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.and_then(|group| group.blooms.into_iter().nth(position.number))
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}
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}
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