Struct JsonPath 

pub struct JsonPath {
    pub segments: Vec<PathSegment>,
}

Parsed JSON path for nested field access.

Examples

use velesdb_core::velesql::json_path::JsonPath;

let path = JsonPath::parse("metadata.source").unwrap();
assert_eq!(path.segments.len(), 2);

let path = JsonPath::parse("items[0].sku").unwrap();
assert_eq!(path.segments.len(), 3);

Fields

segments: Vec<PathSegment>

The segments of the path.

Implementations

impl JsonPath

pub fn new() -> Self

Creates a new empty JsonPath.

pub fn from_property(name: &str) -> Self

Creates a JsonPath from a single property name.

pub fn parse(input: &str) -> Result<Self, JsonPathError>

Parses a JSON path string like "metadata.source" or "items[0].sku".

Errors

Returns an error if the path is malformed.

pub fn is_simple(&self) -> bool

Returns true if this is a simple (non-nested) path with a single property.

pub fn root_property(&self) -> Option<&str>

Returns the root property name, if the path starts with a property.

pub fn tail(&self) -> Self

Returns a sub-path excluding the first segment.

pub fn extract<'a>(&self, doc: &'a Value) -> Option<&'a Value>

Extracts a value from a JSON document following this path.

Returns None if any segment doesn’t match.

pub fn extract_or_null(&self, doc: &Value) -> Value

Extracts a value and clones it, returning Value::Null if not found.

Trait Implementations

impl Clone for JsonPath

fn clone(&self) -> JsonPath

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for JsonPath

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

Formats the value using the given formatter.

impl Default for JsonPath

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for JsonPath

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for JsonPath

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

Formats the value using the given formatter.

impl Eq for JsonPath

impl Hash for JsonPath

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for JsonPath

fn eq(&self, other: &JsonPath) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for JsonPath

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for JsonPath