tepmplate_method.rs

fn main() {
    CvsMiner.mine("file.cvs");
    TxtMiner.mine("file.txt");
}


trait Miner {
    fn mine(&self, file_name: &str) {
        let file = self.open_file(file_name);
        let raw = self.extract_data(file);
        let table = self.parse_data(raw);
        let analysis = self.analyze_data(&table);
        self.send_report(analysis, table);
    }

    fn open_file(&self, file_name: &str) -> () {
        println!("open_file {}", file_name);
    }

    fn extract_data(&self, file: ()) -> String {
        println!("extract data");
        "".into()
    }

    fn parse_data(&self, raw: String) -> ();

    fn analyze_data(&self, table: &()) -> () {
        println!("analyze_data");
    }

    fn send_report(&self, analysis: (), table: ()) {
        println!("send_report\n");
    }
}


struct CvsMiner;

impl Miner for CvsMiner {
    fn parse_data(&self, raw: String) -> () {
        println!("mine Cvs");
    }
}


struct TxtMiner;

impl Miner for TxtMiner {
    fn parse_data(&self, raw: String) -> () {
        println!("mine Txt");
    }
}