# Java-Job: Throws empty error on the "2022 Jan/Java" dataset.
# Python-Job: 111838

# Includes all revisions
p: Project = input;

# Prepare output variables
relative_list: output mean[string][int] of float;

# Temporary variables
cur_date: time;

statement_counter := visitor {
    before node: Statement -> {
        if (node.kind == StatementKind.TRY or node.kind == StatementKind.WITH)
            relative_list[p.name][yearof(cur_date)] << 1;
        else
            relative_list[p.name][yearof(cur_date)] << 0;
    }
};

visit(p, visitor {
    before node: CodeRepository -> {
        for (minus_year: int=19; minus_year >= 0; minus_year--) {
            cur_date = addyear(T"Dec 31, 2019, 10:00:00 AM", -minus_year);
            snapshot := getsnapshot(node, cur_date);

            foreach (i: int; def(snapshot[i]))
                visit(snapshot[i], statement_counter);
        }
    }
});