jsonpath-lib

Rust 버전 JsonPath 구현이다. Rust 구현과 동일한 기능을 Webassembly 로 제공하는 것 또한 목적이다.

The Rust version is a JsonPath implementation. It is also aimed to provide the same functionality as Webassembly in Rust implementation.

왜?

To enjoy Rust!

With Javascript (WebAssembly)

jsonpath-wasm library

(not yet published jsonpath-wasm) javascript // browser import * as jsonpath from "jsonpath-wasm"; // nodejs let jsonpath = require('jsonpath-wasm');

javascript - jsonpath.read(json: string|object, jsonpath: string)

```javascript let jsonObj = { "school": { "friends": [{"id": 0}, {"id": 1}] }, "friends": [{"id": 0}, {"id": 1}] }; let ret = [{"id": 0}, {"id": 0}];

let a = jsonpath.read(JSON.stringify(jsonObj), "$..friends[0]"); let b = jsonpath.read(jsonObj, "$..friends[0]"); console.log( JSON.stringify(ret) == JSON.stringify(a), JSON.stringify(a) == JSON.stringify(b) ); ```

javascript - jsonpath.compile(jsonpath: string)

```javascript let template = jsonpath.compile("$..friends[0]");

let jsonObj = { "school": { "friends": [ {"id": 0}, {"id": 1} ] }, "friends": [ {"id": 0}, {"id": 1} ] };

let ret = JSON.stringify([ {"id": 0}, {"id": 0} ]);

// 1. read as json object console.log(JSON.stringify(template(jsonObj)) == ret); // 2. read as json string console.log(JSON.stringify(template(JSON.stringify(jsonObj))) == ret);

let jsonObj2 = { "school": { "friends": [ {"name": "Millicent Norman"}, {"name": "Vincent Cannon"} ] }, "friends": [ {"id": 0}, {"id": 1} ] };

let ret2 = JSON.stringify([ {"id": 0}, {"name": "Millicent Norman"} ]);

// 1. read as json object console.log(JSON.stringify(template(jsonObj2)) == ret2); // 2. read as json string console.log(JSON.stringify(template(JSON.stringify(jsonObj2))) == ret2); ```

javascript - jsonpath.reader(json: string|object)

```javascript let jsonObj = { "school": { "friends": [{"id": 0}, {"id": 1}] }, "friends": [{"id": 0},{"id": 1}] };

let ret1 = JSON.stringify([ {"id": 0}, {"id": 0} ]); let ret2 = JSON.stringify([ {"id": 1}, {"id": 1} ]);

// 1. read as json object let reader = jsonpath.reader(jsonObj); console.log(JSON.stringify(reader("$..friends[0]")) == ret1); console.log(JSON.stringify(reader("$..friends[1]")) == ret2);

// 2. read as json string let reader2 = jsonpath.reader(JSON.stringify(jsonObj)); console.log(JSON.stringify(reader2("$..friends[0]")) == ret1); console.log(JSON.stringify(reader2("$..friends[1]")) == ret2); ```

javascript - examples

Demo: https://freestrings.github.io/jsonpath/

json 데이터 (참고 사이트: https://github.com/json-path/JsonPath)

javascript { "store": { "book": [ { "category": "reference", "author": "Nigel Rees", "title": "Sayings of the Century", "price": 8.95 }, { "category": "fiction", "author": "Evelyn Waugh", "title": "Sword of Honour", "price": 12.99 }, { "category": "fiction", "author": "Herman Melville", "title": "Moby Dick", "isbn": "0-553-21311-3", "price": 8.99 }, { "category": "fiction", "author": "J. R. R. Tolkien", "title": "The Lord of the Rings", "isbn": "0-395-19395-8", "price": 22.99 } ], "bicycle": { "color": "red", "price": 19.95 } }, "expensive": 10 }

| JsonPath (click link to try)| Result | | :------- | :----- | | $.store.book[].author| The authors of all books | | $..author | All authors | | $.store. | All things, both books and bicycles | | $.store..price | The price of everything | | $..book[2] | The third book | | $..book[-2] | The second to last book | | $..book[0,1] | The first two books | | $..book[:2] | All books from index 0 (inclusive) until index 2 (exclusive) | | $..book[1:2] | All books from index 1 (inclusive) until index 2 (exclusive) | | $..book[-2:] | Last two books | | $..book[2:] | Book number two from tail | | $..book[?(@.isbn)] | All books with an ISBN number | | $.store.book[?(@.price < 10)] | All books in store cheaper than 10 | | $..* | Give me every thing | $..book[ ?(
(@.price == 12.99 | | $.store.bicycle.price < @.price)
|| @.category == "reference"
)] | Complex filter

With Rust (as library)

jsonpath_lib library

```rust extern crate jsonpath_lib as jsonpath;

[macro_use]

extern crate serde_json; ```

rust - jsonpath::read(json: serde_json::value::Value, jsonpath: &str)

rust let json_obj = json!({ "school": { "friends": [{"id": 0}, {"id": 1}] }, "friends": [{"id": 0}, {"id": 1}] }); let json = jsonpath::read(json_obj, "$..friends[0]").unwrap(); let ret = json!([ {"id": 0}, {"id": 0} ]); assert_eq!(json, ret)

rust - jsonpath::compile(jsonpath: &str)

```rust let mut template = jsonpath::compile("$..friends[0]");

let json_obj = json!({ "school": { "friends": [ {"id": 0}, {"id": 1} ] }, "friends": [ {"id": 0}, {"id": 1} ] });

let json = template(jsonobj).unwrap(); let ret = json!([ {"id": 0}, {"id": 0} ]); asserteq!(json, ret);

let json_obj = json!({ "school": { "friends": [ {"name": "Millicent Norman"}, {"name": "Vincent Cannon"} ] }, "friends": [ {"id": 0}, {"id": 1} ] });

let json = template(jsonobj).unwrap(); let ret = json!([ {"id": 0}, {"name": "Millicent Norman"} ]); asserteq!(json, ret); ```

rust - jsonpath::reader(json: serde_json::value::Value)

```rust let json_obj = json!({ "school": { "friends": [{"id": 0}, {"id": 1}] }, "friends": [{"id": 0},{"id": 1}] });

let mut reader = jsonpath::reader(json_obj);

let json = reader("$..friends[0]").unwrap(); let ret = json!([ {"id": 0}, {"id": 0} ]); assert_eq!(json, ret);

let json = reader("$..friends[1]").unwrap(); let ret = json!([ {"id": 1}, {"id": 1} ]); assert_eq!(json, ret); ```

rust - examples

```rust let json_obj = json!({ "store": { "book": [ { "category": "reference", "author": "Nigel Rees", "title": "Sayings of the Century", "price": 8.95 }, { "category": "fiction", "author": "Evelyn Waugh", "title": "Sword of Honour", "price": 12.99 }, { "category": "fiction", "author": "Herman Melville", "title": "Moby Dick", "isbn": "0-553-21311-3", "price": 8.99 }, { "category": "fiction", "author": "J. R. R. Tolkien", "title": "The Lord of the Rings", "isbn": "0-395-19395-8", "price": 22.99 } ], "bicycle": { "color": "red", "price": 19.95 } }, "expensive": 10 });

let mut reader = jsonpath::reader(json_obj);

```

$.store.book[*].author

rust let json = reader("$.store.book[*].author").unwrap(); let ret = json!([ "Nigel Rees", "Evelyn Waugh", "Herman Melville", "J. R. R. Tolkien" ]); assert_eq!(json, ret);

$..author

rust let json = reader("$..author").unwrap(); let ret = json!([ "Nigel Rees", "Evelyn Waugh", "Herman Melville", "J. R. R. Tolkien" ]); assert_eq!(json, ret);

$.store.*

rust let json = reader("$.store.*").unwrap(); let ret = json!([ [ { "category": "reference", "author": "Nigel Rees", "title": "Sayings of the Century", "price": 8.95 }, { "category": "fiction", "author": "Evelyn Waugh", "title": "Sword of Honour", "price": 12.99 }, { "category": "fiction", "author": "Herman Melville", "title": "Moby Dick", "isbn": "0-553-21311-3", "price": 8.99 }, { "category": "fiction", "author": "J. R. R. Tolkien", "title": "The Lord of the Rings", "isbn": "0-395-19395-8", "price": 22.99 } ], { "color": "red", "price": 19.95 } ]); assert_eq!(ret, json);

$.store..price

rust let json = reader("$.store..price").unwrap(); let ret = json!([8.95, 12.99, 8.99, 22.99, 19.95]); assert_eq!(ret, json);

$..book[2]

rust let json = reader("$..book[2]").unwrap(); let ret = json!([{ "category" : "fiction", "author" : "Herman Melville", "title" : "Moby Dick", "isbn" : "0-553-21311-3", "price" : 8.99 }]); assert_eq!(ret, json);

$..book[-2]

rust let json = reader("$..book[-2]").unwrap(); let ret = json!([{ "category" : "fiction", "author" : "Herman Melville", "title" : "Moby Dick", "isbn" : "0-553-21311-3", "price" : 8.99 }]); assert_eq!(ret, json);

$..book[0,1]

rust let json = reader("$..book[0,1]").unwrap(); let ret = json!([ { "category": "reference", "author": "Nigel Rees", "title": "Sayings of the Century", "price": 8.95 }, { "category": "fiction", "author": "Evelyn Waugh", "title": "Sword of Honour", "price": 12.99 } ]); assert_eq!(ret, json);

$..book[:2]

rust let json = reader("$..book[:2]").unwrap(); let ret = json!([ { "category": "reference", "author": "Nigel Rees", "title": "Sayings of the Century", "price": 8.95 }, { "category": "fiction", "author": "Evelyn Waugh", "title": "Sword of Honour", "price": 12.99 } ]); assert_eq!(ret, json);

$..book[2:]

rust let json = reader("$..book[2:]").unwrap(); let ret = json!([ { "category": "fiction", "author": "Herman Melville", "title": "Moby Dick", "isbn": "0-553-21311-3", "price": 8.99 }, { "category": "fiction", "author": "J. R. R. Tolkien", "title": "The Lord of the Rings", "isbn": "0-395-19395-8", "price": 22.99 } ]); assert_eq!(ret, json);

$..book[?(@.isbn)]

rust let json = reader("$..book[?(@.isbn)]").unwrap(); let ret = json!([ { "category": "fiction", "author": "Herman Melville", "title": "Moby Dick", "isbn": "0-553-21311-3", "price": 8.99 }, { "category": "fiction", "author": "J. R. R. Tolkien", "title": "The Lord of the Rings", "isbn": "0-395-19395-8", "price": 22.99 } ]); assert_eq!(ret, json);

$.store.book[?(@.price < 10)]

rust let json = reader("$.store.book[?(@.price < 10)]").unwrap(); let ret = json!([ { "category": "reference", "author": "Nigel Rees", "title": "Sayings of the Century", "price": 8.95 }, { "category": "fiction", "author": "Herman Melville", "title": "Moby Dick", "isbn": "0-553-21311-3", "price": 8.99 } ]); assert_eq!(ret, json);

$..book[?((@.price == 12.99 || $.store.bicycle.price < @.price) || @.category == "reference")]

rust let json = reader(r#"$..book[ ?( (@.price == 12.99 || $.store.bicycle.price < @.price) || @.category == "reference" )]"#).unwrap(); let ret = json!([ { "category": "fiction", "author": "Evelyn Waugh", "title": "Sword of Honour", "price": 12.99 }, { "category": "fiction", "author": "J. R. R. Tolkien", "title": "The Lord of the Rings", "isbn": "0-395-19395-8", "price": 22.99 }, { "category": "reference", "author": "Nigel Rees", "title": "Sayings of the Century", "price": 8.95 } ]); assert_eq!(ret, json);