1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50

use context::Context;
use error::{Error, Result};
use path::Path;
use render::Chomp;
use serde_json::Value;
use std::io::Write;

impl<W: Write> Context<W> for Value {
    fn inject(&self, path: Path, sink: &mut W) -> Result<()> {
        use self::Value::*;

        let mut value = self;

        for part in path.parts() {
            if let Some(next_value) = value.get(part) {
                value = next_value;
            } else {
                return Err(Error::Undefined(path.to_owned()));
            }
        }

        match value {
            &String(ref s) => sink.write_all(s.as_bytes()),
            x => write!(sink, "{}", x),
        }?;

        Ok(())
    }

    fn iterate(&self, path: Path, mut chomp: Chomp<W>) -> Result<()> {
        let mut value = self;

        for part in path.parts() {
            if let Some(next_value) = value.get(part) {
                value = next_value;
            } else {
                return Err(Error::Undefined(path.to_owned()));
            }
        }

        if let &Value::Array(ref array) = value {
            for value in array {
                chomp.chomp(value)?;
            }
            Ok(())
        } else {
            Err(Error::NotIterable(path.to_owned()))
        }
    }
}