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use crate::construction::heuristics::InsertionContext;
use crate::solver::RefinementContext;
pub trait Recreate {
fn run(&self, refinement_ctx: &RefinementContext, insertion_ctx: InsertionContext) -> InsertionContext;
}
mod recreate_with_cheapest;
pub use self::recreate_with_cheapest::RecreateWithCheapest;
mod recreate_with_gaps;
pub use self::recreate_with_gaps::RecreateWithGaps;
mod recreate_with_blinks;
pub use self::recreate_with_blinks::RecreateWithBlinks;
mod recreate_with_regret;
pub use self::recreate_with_regret::RecreateWithRegret;
mod recreate_with_nearest_neighbor;
pub use self::recreate_with_nearest_neighbor::*;
use crate::models::common::SingleDimLoad;
use crate::models::Problem;
use std::sync::Arc;
pub struct CompositeRecreate {
recreates: Vec<Box<dyn Recreate + Send + Sync>>,
weights: Vec<usize>,
}
impl CompositeRecreate {
pub fn new(recreates: Vec<(Box<dyn Recreate + Send + Sync>, usize)>) -> Self {
let weights = recreates.iter().map(|(_, weight)| *weight).collect();
let recreates = recreates.into_iter().map(|(recreate, _)| recreate).collect();
Self { recreates, weights }
}
pub fn new_from_problem(_problem: Arc<Problem>) -> Self {
Self::new(vec![
(Box::new(RecreateWithCheapest::default()), 100),
(Box::new(RecreateWithRegret::default()), 10),
(Box::new(RecreateWithBlinks::<SingleDimLoad>::default()), 2),
(Box::new(RecreateWithRegret::new(2, 4)), 2),
(Box::new(RecreateWithGaps::default()), 2),
(Box::new(RecreateWithNearestNeighbor::default()), 2),
])
}
}
impl Recreate for CompositeRecreate {
fn run(&self, refinement_ctx: &RefinementContext, insertion_ctx: InsertionContext) -> InsertionContext {
let index = insertion_ctx.random.weighted(self.weights.as_slice());
self.recreates.get(index).unwrap().run(refinement_ctx, insertion_ctx)
}
}