jagua_rs/probs/bpp/io/
import.rs

Help
1use crate::entities::Item;
2use crate::io::import::Importer;
3use crate::probs::bpp::entities::{BPInstance, Bin};
4use crate::probs::bpp::io::ext_repr::ExtBPInstance;
5use itertools::Itertools;
6use rayon::prelude::*;
7
8use anyhow::{Result, ensure};
9
10/// Imports an instance into the library
11pub fn import(importer: &Importer, ext_instance: &ExtBPInstance) -> Result<BPInstance> {
12    let items = {
13        let mut items = ext_instance
14            .items
15            .par_iter()
16            .map(|ext_item| {
17                let item = importer.import_item(&ext_item.base)?;
18                let demand = ext_item.demand as usize;
19                Ok((item, demand))
20            })
21            .collect::<Result<Vec<(Item, usize)>>>()?;
22
23        items.sort_by_key(|(item, _)| item.id);
24        ensure!(
25            items.iter().enumerate().all(|(i, (item, _))| item.id == i),
26            "All items should have consecutive IDs starting from 0. IDs: {:?}",
27            items.iter().map(|(item, _)| item.id).sorted().collect_vec()
28        );
29        items
30    };
31
32    let bins = {
33        let mut bins: Vec<Bin> = ext_instance
34            .bins
35            .par_iter()
36            .map(|ext_bin| {
37                let container = importer.import_container(&ext_bin.base)?;
38                Ok(Bin::new(container, ext_bin.stock, ext_bin.cost))
39            })
40            .collect::<Result<Vec<Bin>>>()?;
41
42        bins.sort_by_key(|bin| bin.id);
43        ensure!(
44            bins.iter().enumerate().all(|(i, bin)| bin.id == i),
45            "All bins should have consecutive IDs starting from 0. IDs: {:?}",
46            bins.iter().map(|bin| bin.id).sorted().collect_vec()
47        );
48        bins
49    };
50
51    Ok(BPInstance::new(items, bins))
52}
jagua_rs/probs/bpp/io/import.rs

jagua_rs/probs/bpp/io/
import.rs
