Struct ConceptRow

pub struct ConceptRow {
    pub row: Vec<Option<Concept>>,
    /* private fields */
}

A single row of concepts representing substitutions for variables in the query. Contains a Header (column names and query type), and the row of optional concepts. An empty concept in a column means the variable does not have a substitution in this answer.

Fields

row: Vec<Option<Concept>>

Implementations

impl ConceptRow

pub fn new(header: Arc<ConceptRowHeader>, row: Vec<Option<Concept>>) -> Self

pub fn get_column_names(&self) -> &[String]

Retrieve the row column names (shared by all elements in this stream).

Examples

concept_row.get_column_names()

pub fn get_query_type(&self) -> QueryType

Retrieve the executed query’s type (shared by all elements in this stream).

Examples

concept_row.get_query_type()

pub fn get(&self, column_name: &str) -> Result<Option<&Concept>>

Retrieves a concept for a given variable. Returns an empty optional if the variable name has an empty answer. Returns an error if the variable name is not present.

Arguments

• var_name — The variable name in the row to retrieve

Examples

concept_row.get(var_name)

pub fn get_index(&self, column_index: usize) -> Result<Option<&Concept>>

Retrieves a concept for a given column index. Returns an empty optional if the index points to an empty answer. Returns an error if the index is not in the row’s range.

Arguments

• column_index — The position in the row to retrieve

Examples

concept_row.get_position(column_index)

pub fn get_concepts(&self) -> impl Iterator<Item = &Concept>

Produces an iterator over all concepts in this ConceptRow, skipping empty results

Examples

concept_row.concepts()

Trait Implementations

impl Clone for ConceptRow

fn clone(&self) -> ConceptRow

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ConceptRow

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

Formats the value using the given formatter.

impl Display for ConceptRow

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

Formats the value using the given formatter.

impl PartialEq for ConceptRow

fn eq(&self, other: &ConceptRow) -> 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 StructuralPartialEq for ConceptRow