BlankNode

flams_math_archives::triple_store::sparql::spargebra::term

Struct BlankNode

pub struct BlankNode(BlankNodeContent);

Available on crate feature rdf only.

Expand description

An owned RDF blank node.

The common way to create a new blank node is to use the BlankNode::default() function.

It is also possible to create a blank node from a blank node identifier using the BlankNode::new() function. The blank node identifier must be valid according to N-Triples, Turtle, and SPARQL grammars.

The default string formatter is returning an N-Triples, Turtle, and SPARQL compatible representation:

use oxrdf::BlankNode;

assert_eq!("_:a122", BlankNode::new("a122")?.to_string());

Tuple Fields§

§0: BlankNodeContent

Implementations§

impl BlankNode

pub fn new(id: impl Into<String>) -> Result<BlankNode, BlankNodeIdParseError>

Creates a blank node from a unique identifier.

The blank node identifier must be valid according to N-Triples, Turtle, and SPARQL grammars.

In most cases, it is much more convenient to create a blank node using BlankNode::default() that creates a random ID that could be easily inlined by Oxigraph stores.

pub fn new_unchecked(id: impl Into<String>) -> BlankNode

Creates a blank node from a unique identifier without validation.

It is the caller’s responsibility to ensure that id is a valid blank node identifier according to N-Triples, Turtle, and SPARQL grammars.

BlankNode::new() is a safe version of this constructor and should be used for untrusted data.

pub fn new_from_unique_id(id: u128) -> BlankNode

Creates a blank node from a unique numerical id.

In most cases, it is much more convenient to create a blank node using BlankNode::default().

pub fn as_str(&self) -> &str

Returns the underlying ID of this blank node.

pub fn into_string(self) -> String

Returns the underlying ID of this blank node.

pub fn as_ref(&self) -> BlankNodeRef<'_>

Trait Implementations§

impl Clone for BlankNode

fn clone(&self) -> BlankNode

Returns a duplicate of the value. Read more

1.0.0 · Source§

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

Performs copy-assignment from source. Read more

impl Debug for BlankNode

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

Formats the value using the given formatter. Read more

impl Default for BlankNode

fn default() -> BlankNode

Builds a new RDF blank node with a unique id.

impl Display for BlankNode

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

Formats the value using the given formatter. Read more

impl<'a> From<&'a BlankNode> for BlankNodeRef<'a>

fn from(node: &'a BlankNode) -> BlankNodeRef<'a>

Converts to this type from the input type.

impl<'a> From<&'a BlankNode> for GraphNameRef<'a>

fn from(node: &'a BlankNode) -> GraphNameRef<'a>

Converts to this type from the input type.

impl<'a> From<&'a BlankNode> for TermRef<'a>

fn from(node: &'a BlankNode) -> TermRef<'a>

Converts to this type from the input type.

impl<'a> From<&'a BlankNode> for NamedOrBlankNodeRef<'a>

fn from(node: &'a BlankNode) -> NamedOrBlankNodeRef<'a>

Converts to this type from the input type.

impl From<BlankNode> for GraphName

fn from(node: BlankNode) -> GraphName

Converts to this type from the input type.

impl From<BlankNode> for N3Term

fn from(node: BlankNode) -> N3Term

Converts to this type from the input type.

impl From<BlankNode> for Term

fn from(node: BlankNode) -> Term

Converts to this type from the input type.

impl From<BlankNode> for NamedOrBlankNode

fn from(node: BlankNode) -> NamedOrBlankNode

Converts to this type from the input type.

impl From<BlankNode> for TermPattern

fn from(node: BlankNode) -> TermPattern

Converts to this type from the input type.

impl<'a> From<BlankNodeRef<'a>> for BlankNode

fn from(node: BlankNodeRef<'a>) -> BlankNode

Converts to this type from the input type.

impl FromStr for BlankNode

fn from_str(s: &str) -> Result<BlankNode, <BlankNode as FromStr>::Err>

Parses a blank node from its NTriples serialization

use oxrdf::BlankNode;
use std::str::FromStr;

assert_eq!(BlankNode::from_str("_:ex")?, BlankNode::new("ex")?);

type Err = TermParseError

The associated error which can be returned from parsing.

impl Hash for BlankNode

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

Feeds this value into the given Hasher. Read more

1.3.0 · Source§

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

Feeds a slice of this type into the given Hasher. Read more

impl PartialEq<BlankNode> for BlankNodeRef<'_>

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

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

1.0.0 · Source§

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 PartialEq<BlankNodeRef<'_>> for BlankNode

fn eq(&self, other: &BlankNodeRef<'_>) -> bool

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

1.0.0 · Source§

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 PartialEq for BlankNode

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

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

1.0.0 · Source§

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 TryFrom<Term> for BlankNode

type Error = TryFromTermError

The type returned in the event of a conversion error.

fn try_from( term: Term, ) -> Result<BlankNode, <BlankNode as TryFrom<Term>>::Error>

Performs the conversion.

impl Eq for BlankNode

impl StructuralPartialEq for BlankNode

Auto Trait Implementations§

impl Freeze for BlankNode

impl RefUnwindSafe for BlankNode

impl Send for BlankNode

impl Sync for BlankNode

impl Unpin for BlankNode

impl UnwindSafe for BlankNode

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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Immutably borrows from an owned value. Read more

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Mutably borrows from an owned value. Read more

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

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Checks if this value is equivalent to the given key. Read more

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