Struct JsonProfiler 

pub struct JsonProfiler { /* private fields */ }

Profiles JSON records path by path in bounded memory. See the module docs.

use rich_data::profile::{JsonProfiler, ProfileOptions};
use serde_json::json;

let options = ProfileOptions { depth: 1, ..Default::default() };
let mut profiler = JsonProfiler::new(options);
profiler.push(&json!({"a": {"b": 1}}));
profiler.push(&json!({"a": "x"}));
let profile = profiler.finish().unwrap();
let a = profile.column("a").unwrap();
// One step deep: the object is a value of `a`, as its JSON text.
assert_eq!(a.types.unwrap().mix(), "str 50% · obj 50%");
assert_eq!(a.distinct, 2);

Implementations

impl JsonProfiler

pub fn new(options: ProfileOptions) -> Self

A profiler with options (depth, max_paths, sample, top, bins, buckets and columns, which names paths).

pub fn push(&mut self, record: &Json)

Add a record.

pub fn skip_malformed(&mut self, line: usize, message: impl Into<String>)

Count a line that could not be read as JSON (it is not a record): its 1-based number and why.

pub fn finish(self) -> Result<Profile, DataError>

The profile of every record pushed. Fails when ProfileOptions::columns names a path that was not profiled.

Trait Implementations

impl Clone for JsonProfiler

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for JsonProfiler

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.