datasources-postgres 0.1.12

Postgres datasource provider
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54

mod binary_converter;
mod bool_converter;
mod datetime_converter;
mod decimal_converter;
mod uuid_converter;

use datasources::{TypeConverter, Value};
use std::collections::HashMap;

pub use binary_converter::BinaryConverter;
pub use bool_converter::BoolConverter;
pub use datetime_converter::DateTimeConverter;
pub use decimal_converter::DecimalConverter;
pub use uuid_converter::UuidConverter;

fn catalog() -> Vec<(&'static str, Box<dyn TypeConverter<Value, Value> + Send + Sync>)> {
    vec![
        ("bool", Box::new(BoolConverter)),
        ("datetime", Box::new(DateTimeConverter)),
        ("uuid", Box::new(UuidConverter)),
        ("decimal", Box::new(DecimalConverter)),
        ("binary", Box::new(BinaryConverter)),
    ]
}

pub fn row_type_converters() -> HashMap<String, Box<dyn TypeConverter<Value, Value> + Send + Sync>>
{
    catalog()
        .into_iter()
        .map(|(key, converter)| (key.to_string(), converter))
        .collect()
}

pub fn field(canonical: &str) -> Option<Box<dyn TypeConverter<Value, Value> + Send + Sync>> {
    catalog()
        .into_iter()
        .find(|(key, _)| *key == canonical)
        .map(|(_, converter)| converter)
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn registers_catalog() {
        let catalog = row_type_converters();
        for key in ["bool", "datetime", "uuid", "decimal", "binary"] {
            assert!(catalog.contains_key(key));
            assert!(field(key).is_some());
        }
        assert!(field("int").is_none());
    }
}