Struct TriplePattern 

pub struct TriplePattern {
    pub subject: String,
    pub predicate: String,
    pub object: String,
    pub estimated_cardinality: Option<u64>,
}

Triple pattern in SPARQL query

Fields

subject: String

Subject (variable or constant)

predicate: String

Predicate (variable or constant)

object: String

Object (variable or constant)

estimated_cardinality: Option<u64>

Estimated cardinality

Implementations

impl TriplePattern

pub fn new(subject: &str, predicate: &str, object: &str) -> Self

Create a new triple pattern

pub fn is_variable(term: &str) -> bool

Check if a term is a variable (starts with ‘?’)

pub fn variables(&self) -> HashSet<String>

Get all variables in the pattern

pub fn join_variables(&self, other: &TriplePattern) -> HashSet<String>

Get join variables with another pattern

pub fn bound_count(&self) -> usize

Count bound terms (non-variables)

Trait Implementations

impl Clone for TriplePattern

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 TriplePattern

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for TriplePattern

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for TriplePattern

impl Hash for TriplePattern

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 TriplePattern

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for TriplePattern

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 TriplePattern