use std::rc::Rc;
use std::collections::HashMap;

struct MetaClass<T> {
    file_name: String,
    idx: i32,
    prim_key: String,
    sec_key: String,
    wrap_list: Vec<Rc<T>>,
    wrap_id_hash: HashMap<i64, Rc<T>>,
    wrap_name_hash: HashMap<String, Rc<T>>
}

pub struct MetaMgr<T> {
    meta_classes: Vec<MetaClass::<T>>,
}

impl<T> MetaMgr<T> {

    pub fn new() -> Self {
        return MetaMgr::<T>{
            meta_classes: Vec::new()
        };
    }

    pub fn init(&mut self) {

    }

    pub fn un_init(&mut self) {

    }

    pub fn get_byid(&mut self, idx: i32, id: i64) -> Option<&Rc<T>> {
        return self.internal_get_byid(idx as usize, id);
    }

    pub fn internal_get_byid(&mut self, idx: usize, id: i64) -> Option<&Rc<T>> {
        if idx >= 0 && idx <= self.meta_classes.len() {
            match self.meta_classes[idx].wrap_id_hash.get(&id) {
                Some(v) => {
                    return Some(v);
                }
                None => {

                }
            }
        }
        return None;
    }

}