Struct MappingEngine 

pub struct MappingEngine {
    pub skip_errors: bool,
}

Engine that executes MappingRules and produces RDF Triples

The engine is stateless and cheap to create. All configuration is carried by the rules themselves.

Fields

skip_errors: bool

Whether to skip rows that produce errors instead of failing fast

Implementations

impl MappingEngine

pub fn new() -> Self

Create a new mapping engine with default settings (fail-fast)

pub fn new_lenient() -> Self

Create an engine that silently skips rows that produce mapping errors

pub fn execute(&self, rule: &MappingRule) -> MappingResult<Vec<Triple>>

Execute a single mapping rule and return all produced triples

pub fn execute_all(&self, rules: &[MappingRule]) -> MappingResult<Vec<Triple>>

Execute multiple rules and concatenate all produced triples

pub fn parse_csv( content: &str, delimiter: char, ) -> MappingResult<(Vec<String>, Vec<Row>)>

Parse CSV content into (headers, rows).

Handles:

• Configurable delimiter
• Double-quote escaping ("" inside a quoted field)
• CRLF and LF line endings
• Quoted fields that span multiple lines

pub fn parse_json( content: &str, json_path: Option<&str>, ) -> MappingResult<Vec<Row>>

Parse JSON content into rows.

Behaviour:

• If json_path is None, the root must be a JSON array of objects.
• If json_path is Some("a.b.c"), the engine traverses object keys a → b → c and expects to find an array there.
• Each array element must be a JSON object; its key-value pairs become the row fields (values are coerced to strings).

Trait Implementations

impl Clone for MappingEngine

fn clone(&self) -> MappingEngine

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MappingEngine

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

Formats the value using the given formatter.

impl Default for MappingEngine

fn default() -> MappingEngine

Returns the “default value” for a type.