jsonptr - JSON Pointers for Rust

Data structures and logic for resolving, assigning, and deleting by JSON Pointers (RFC 6901).

Usage

Resolve

JSON Pointers can be created either with a slice of strings or directly from a properly encoded string representing a JSON Pointer.

```rust use jsonptr::{Pointer, Resolve, ResolveMut}; use serde_json::json;

fn main() { let mut data = json!({ "foo": { "bar": "baz" } });

let ptr = Pointer::new(&["foo", "bar"]);
ptr.resolve(&data);
let bar = data.resolve(&ptr).unwrap();
assert_eq!(bar, "baz");

let ptr = Pointer::try_from("/foo/bar").unwrap();
let mut bar = data.resolve_mut(&ptr).unwrap(); // alternatively: ptr.resolve_mut(&mut data);
assert_eq!(bar, "baz");

}

```

Assign

```rust use jsonptr::{Pointer, Assign}; use serde_json::json;

fn main() { let ptr = Pointer::tryfrom("/foo/bar").unwrap(); let mut data = json!({}); let val = json!("qux"); let assignment = data.assign(&ptr, val); asserteq!(data, json!({ "foo": { "bar": "qux" }})) } ```

Delete

```rust use jsonptr::{Pointer, Delete}; use serdejson::json; fn main() { let mut data = json!({ "foo": { "bar": { "baz": "qux" } } }); let ptr = Pointer::new(&["foo", "bar", "baz"]); asserteq!(data.delete(&ptr), Ok(Some("qux".into()))); assert_eq!(data, json!({ "foo": { "bar": {} } }));

// unresolved pointers return Ok(None)
let mut data = json!({});
let ptr = Pointer::new(&["foo", "bar", "baz"]);
assert_eq!(ptr.delete(&mut data), Ok(None));
assert_eq!(data, json!({}));

// replacing a root pointer replaces data with `Value::Null`
let mut data = json!({ "foo": { "bar": "baz" } });
let ptr = Pointer::default();
assert_eq!(data.delete(&ptr), Ok(Some(json!({ "foo": { "bar": "baz" } }))));
assert!(data.is_null());

} ```

Contributions / Issues

Contributions and feedback are always welcome and appreciated.

If you find an issue, please open a ticket or a pull request.

License

MIT or Apache 2.0.