json_predicate/predicate/
context.rs

1use std::error::Error;
2
3use crate::json_path::{JSONPath, JSONPathError};
4
5/// The context to run the evaluation, you can have an empty context with
6/// `PredicateContext::default()`.
7#[derive(Default, Clone, Debug)]
8pub struct PredicateContext {
9    location: Option<JSONPath>,
10}
11
12#[derive(Debug, thiserror::Error)]
13pub enum PredicateContextError {
14    #[error("{0}")]
15    Deserialize(#[from] Box<dyn Error>),
16    #[error("{0}")]
17    JSONPath(#[from] JSONPathError),
18}
19
20impl From<JSONPath> for PredicateContext {
21    fn from(value: JSONPath) -> Self {
22        Self {
23            location: Some(value),
24        }
25    }
26}
27
28impl From<Option<JSONPath>> for PredicateContext {
29    fn from(value: Option<JSONPath>) -> Self {
30        Self { location: value }
31    }
32}
33
34impl PredicateContext {
35    pub fn new(path: String) -> Result<Self, PredicateContextError> {
36        let location = JSONPath::new(path)?;
37
38        Ok(Self {
39            location: Some(location),
40        })
41    }
42
43    pub fn final_path(&self, path: &Option<JSONPath>) -> Option<JSONPath> {
44        // TODO: Remove cloning
45        match (self.location.clone(), path.clone()) {
46            (None, None) => None,
47            (Some(path), None) | (None, Some(path)) => Some(path),
48            (Some(root), Some(path)) => Some(root + path),
49        }
50    }
51}
json_predicate/predicate/context.rs

json_predicate/predicate/
context.rs
