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use std::collections::HashSet;
use super::StateData;
use super::var::VarId;
use super::value::ValidVal;
pub struct StateDataFiltered<'sd> {
allowed_var_ids: HashSet<VarId>,
state_data: &'sd StateData,
}
impl<'sd> StateDataFiltered<'sd> {
pub fn new(state_data: &'sd StateData, allowed_var_ids: HashSet<VarId>) -> Self {
Self { state_data, allowed_var_ids }
}
pub fn get(&self, var_id: &VarId) -> Option<&ValidVal> {
if !self.allowed_var_ids.contains(var_id) {
return None
}
self.state_data.get(var_id)
}
pub fn contains(&self, var_id: &VarId) -> bool {
if !self.allowed_var_ids.contains(var_id) {
return false;
}
self.state_data.contains(var_id)
}
}
#[cfg(test)]
mod tests {
use std::collections::HashSet;
use crate::{StateData, value::ValidVal, test_var_val};
use super::StateDataFiltered;
#[test]
fn basic() {
let var1 = test_var_val();
let var2 = test_var_val();
let val1_valid = ValidVal::try_new(var1.1.clone(), &var1.0).unwrap();
let mut data = StateData::new();
data.insert(&var1.0, var1.1).unwrap();
data.insert(&var2.0, var2.1).unwrap();
let mut filter = HashSet::new();
filter.insert(var1.0.id().clone());
let data_filtered = StateDataFiltered::new(&data, filter);
assert_eq!(data_filtered.get(var1.0.id()), Some(&val1_valid));
assert_eq!(data_filtered.get(var2.0.id()), None);
}
}