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README.md - Rust

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freestrings
2019-03-06 18:55:21 +09:00
parent 728345d6a6
commit c3e5f61642
4 changed files with 522 additions and 202 deletions
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6
src/filter/value_filter.rs
View File

@@ -257,12 +257,12 @@ impl JsonValueFilter {
pub fn new(json: &str) -> result::Result<Self, String> {
let json: Value = serde_json::from_str(json)
.map_err(|e| e.description().to_string())?;
Ok(JsonValueFilter::new_from_value(json))
Ok(JsonValueFilter::new_from_value(Rc::new(Box::new(json))))
}
pub fn new_from_value(json: Value) -> Self{
pub fn new_from_value(json: Rc<Box<Value>>) -> Self {
JsonValueFilter {
json: Rc::new(Box::new(json)),
json: json,
filter_stack: Vec::new(),
token_stack: Vec::new(),
term_stack: Vec::new(),

282
src/lib.rs
View File

@@ -2,11 +2,11 @@
//!
//! # Example
//! ```
//! extern crate jsonpath_lib as jsonpath;
//! #[macro_use]
//! extern crate serde_json;
//! extern crate jsonpath_lib as jsonpath;
//! #[macro_use]
//! extern crate serde_json;
//!
//! let json_obj = json!({
//! let json_obj = json!({
//! "store": {
//! "book": [
//! {
@@ -42,180 +42,122 @@
//! }
//! },
//! "expensive": 10
//! });
//! });
//!
//! let mut reader = jsonpath::reader(json_obj);
//! let mut reader = jsonpath::reader(json_obj);
//!
//! //
//! // $.store.book[*].author
//! //
//! let json = reader("$.store.book[*].author");
//! let ret = json!(["Nigel Rees","Evelyn Waugh","Herman Melville","J. R. R. Tolkien"]);
//! assert_eq!(json, ret);
//! //
//! // $.store.book[*].author
//! //
//! let json = reader("$.store.book[*].author").unwrap();
//! let ret = json!(["Nigel Rees","Evelyn Waugh","Herman Melville","J. R. R. Tolkien"]);
//! assert_eq!(json, ret);
//!
//! //
//! // $..author
//! //
//! let json = reader("$..author");
//! let ret = json!(["Nigel Rees","Evelyn Waugh","Herman Melville","J. R. R. Tolkien"]);
//! assert_eq!(json, ret);
//! //
//! // $..author
//! //
//! let json = reader("$..author").unwrap();
//! let ret = json!(["Nigel Rees","Evelyn Waugh","Herman Melville","J. R. R. Tolkien"]);
//! assert_eq!(json, ret);
//!
//! //
//! // $.store.*
//! //
//! let json = reader("$.store.*");
//! let ret = json!(["Nigel Rees","Evelyn Waugh","Herman Melville","J. R. R. Tolkien"]);
//! 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);
//! //
//! // $.store.*
//! //
//! let json = reader("$.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);
//!
//! //
//! // $.store..price
//! //
//! let json = reader("$.store..price");
//! let ret = json!([8.95, 12.99, 8.99, 22.99, 19.95]);
//! assert_eq!(ret, json);
//! //
//! // $.store..price
//! //
//! let json = reader("$.store..price").unwrap();
//! let ret = json!([8.95, 12.99, 8.99, 22.99, 19.95]);
//! assert_eq!(ret, json);
//!
//! //
//! // $..book[2]
//! //
//! let json = reader("$..book[2]");
//! let ret = json!([{
//! "category" : "fiction",
//! "author" : "Herman Melville",
//! "title" : "Moby Dick",
//! "isbn" : "0-553-21311-3",
//! "price" : 8.99
//! }]);
//! assert_eq!(ret, json);
//! //
//! // $..book[2]
//! //
//! let json = reader("$..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);
//!
//! //
//! // $..book[-2]
//! //
//! let json = reader("$..book[-2]");
//! let ret = json!([{
//! "category" : "fiction",
//! "author" : "Herman Melville",
//! "title" : "Moby Dick",
//! "isbn" : "0-553-21311-3",
//! "price" : 8.99
//! }]);
//! assert_eq!(ret, json);
//! //
//! // $..book[-2]
//! //
//! let json = reader("$..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);
//!
//! //
//! // $..book[0,1]
//! //
//! let json = reader("$..book[0,1]");
//! 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);
//! //
//! // $..book[0,1]
//! //
//! let json = reader("$..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);
//!
//! //
//! // $..book[:2]
//! //
//! let json = reader("$..book[:2]");
//! 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);
//! //
//! // $..book[:2]
//! //
//! let json = reader("$..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);
//!
//! //
//! // $..book[2:]
//! //
//! let json = reader("$..book[2:]");
//! 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);
//! //
//! // $..book[2:]
//! //
//! let json = reader("$..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);
//!
//! //
//! // $..book[?(@.isbn)]
//! //
//! let json = reader("$..book[?(@.isbn)]");
//! 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);
//!
//! //
//! // $.store.book[?(@.price < 10)]
//! //
//! let json = reader("$.store.book[?(@.price < 10)]");
//! 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);
//! //
//! // $..book[?(@.isbn)]
//! //
//! let json = reader("$..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);
//!
//! //
//! // $.store.book[?(@.price < 10)]
//! //
//! let json = reader("$.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);
//! ```
//!
#[macro_use]
extern crate log;
extern crate env_logger;
@@ -239,6 +181,7 @@ use parser::parser::*;
use filter::value_filter::*;
use std::result;
use std::rc::Rc;
use serde_json::Value;
type Result = result::Result<Value, String>;
@@ -278,7 +221,7 @@ pub fn compile<'a>(path: &'a str) -> impl FnMut(Value) -> Result + 'a {
move |json| {
match &node {
Ok(n) => {
let mut jf = JsonValueFilter::new_from_value(json);
let mut jf = JsonValueFilter::new_from_value(Rc::new(Box::new(json)));
jf.visit(n.clone());
Ok(jf.take_value())
}
@@ -309,8 +252,9 @@ pub fn compile<'a>(path: &'a str) -> impl FnMut(Value) -> Result + 'a {
/// assert_eq!(json, ret);
/// ```
pub fn reader(json: Value) -> impl FnMut(&str) -> Result {
let mut jf = JsonValueFilter::new_from_value(json);
let n = Rc::new(Box::new(json));
move |path: &str| {
let mut jf = JsonValueFilter::new_from_value(n.clone());
let mut parser = Parser::new(path);
parser.parse(&mut jf)?;
Ok(jf.take_value())
@@ -326,12 +270,12 @@ pub fn reader(json: Value) -> impl FnMut(&str) -> Result {
/// },
/// "friends": [{"id": 0}, {"id": 1}]
/// });
/// let mut reader = jsonpath::read(json_obj, "$..friends[0]");
/// let json = jsonpath::read(json_obj, "$..friends[0]").unwrap();
/// let ret = json!([ {"id": 0}, {"id": 0} ]);
/// assert_eq!(json, ret);
/// ```
pub fn read(json: Value, path: &str) -> Result {
let mut jf = JsonValueFilter::new_from_value(json);
let mut jf = JsonValueFilter::new_from_value(Rc::new(Box::new(json)));
let mut parser = Parser::new(path);
parser.parse(&mut jf)?;
Ok(jf.take_value())