开源软件名称：

freestrings/jsonpath

开源软件地址：

https://github.com/freestrings/jsonpath

开源编程语言：

Rust 85.7%

开源软件介绍：

jsonpath_lib

Rust 버전 JsonPath 구현으로 Webassembly와 Javascript에서도 유사한 API 인터페이스를 제공 한다.

It is JsonPath JsonPath engine written in Rust. it provide a similar API interface in Webassembly and Javascript too.

Rust API

jsonpath_lib crate

Go to jsonpath_lib creates.io

extern crate jsonpath_lib as jsonpath;

Rust - jsonpath::Selector struct

#[derive(Deserialize, PartialEq, Debug)]
struct Friend {
    name: String,
    age: Option<u8>,
}

let json_obj = json!({
    "school": {
        "friends": [
            {"name": "친구1", "age": 20},
            {"name": "친구2", "age": 20}
        ]
    },
    "friends": [
        {"name": "친구3", "age": 30},
        {"name": "친구4"}
]});

let mut selector = Selector::new();

let result = selector
    .path("$..[?(@.age >= 30)]").unwrap()
    .value(&json_obj)
    .select().unwrap();

assert_eq!(vec![&json!({"name": "친구3", "age": 30})], result);

let result = selector.select_as_str().unwrap();
assert_eq!(r#"[{"name":"친구3","age":30}]"#, result);

let result = selector.select_as::<Friend>().unwrap();
assert_eq!(vec![Friend { name: "친구3".to_string(), age: Some(30) }], result);

Rust - jsonpath::SelectorMut struct

let json_obj = json!({
    "school": {
        "friends": [
            {"name": "친구1", "age": 20},
            {"name": "친구2", "age": 20}
        ]
    },
    "friends": [
        {"name": "친구3", "age": 30},
        {"name": "친구4"}
]});

let mut selector_mut = SelectorMut::new();

let result = selector_mut
    .str_path("$..[?(@.age == 20)].age").unwrap()
    .value(json_obj)
    .replace_with(&mut |v| {
        let age = if let Value::Number(n) = v {
            n.as_u64().unwrap() * 2
        } else {
            0
        };

        Some(json!(age))
    }).unwrap()
    .take().unwrap();

assert_eq!(result, json!({
    "school": {
        "friends": [
            {"name": "친구1", "age": 40},
            {"name": "친구2", "age": 40}
        ]
    },
    "friends": [
        {"name": "친구3", "age": 30},
        {"name": "친구4"}
]}));

Rust - jsonpath::select(json: &serde_json::value::Value, jsonpath: &str)

let json_obj = json!({
    "school": {
        "friends": [
            {"name": "친구1", "age": 20},
            {"name": "친구2", "age": 20}
        ]
    },
    "friends": [
        {"name": "친구3", "age": 30},
        {"name": "친구4"}
]});

let json = jsonpath::select(&json_obj, "$..friends[0]").unwrap();

assert_eq!(json, vec![
    &json!({"name": "친구3", "age": 30}),
    &json!({"name": "친구1", "age": 20})
]);

Rust - jsonpath::select_as_str(json_str: &str, jsonpath: &str)

let ret = jsonpath::select_as_str(r#"
{
    "school": {
        "friends": [
                {"name": "친구1", "age": 20},
                {"name": "친구2", "age": 20}
            ]
    },
    "friends": [
        {"name": "친구3", "age": 30},
        {"name": "친구4"}
    ]
}
"#, "$..friends[0]").unwrap();

assert_eq!(ret, r#"[{"name":"친구3","age":30},{"name":"친구1","age":20}]"#);