Struct terminus_store::layer::ValueTriple

pub struct ValueTriple {
    pub subject: String,
    pub predicate: String,
    pub object: ObjectType,
}

A triple stored as strings.

Fields

subject: String

predicate: String

object: ObjectType

Implementations

impl ValueTriple

pub fn new_node(subject: &str, predicate: &str, object: &str) -> ValueTriple

Construct a triple with a node object.

Nodes may appear in both the subject and object position.

Examples found in repository

examples/write_to_graph.rs (line 28)

async fn parse_command(s: &str) -> io::Result<Command> {
    lazy_static! {
        static ref RE: Regex =
            Regex::new(r"(\S*)\s*(\S*)\s*,\s*(\S*)\s*,\s*(\S*)\s*(\S*)\s*").unwrap();
    }

    if let Some(matches) = RE.captures(s) {
        let command_name = &matches[1];
        let subject = &matches[2];
        let predicate = &matches[3];
        let object_type_name = &matches[4];
        let object = &matches[5];

        let triple = match object_type_name {
            "node" => ValueTriple::new_node(subject, predicate, object),
            "value" => ValueTriple::new_string_value(subject, predicate, object),
            _ => {
                return Err(io::Error::new(
                    io::ErrorKind::InvalidData,
                    format!("invalid object type {}", object_type_name),
                ))
            }
        };

        match command_name {
            "add" => Ok(Command::Add(triple)),
            "remove" => Ok(Command::Remove(triple)),
            _ => Err(io::Error::new(
                io::ErrorKind::InvalidData,
                format!("invalid command {}", command_name),
            )),
        }
    } else {
        Err(io::Error::new(
            io::ErrorKind::InvalidData,
            format!("could not match line {}", s),
        ))
    }
}

pub fn new_value( subject: &str, predicate: &str, object: TypedDictEntry ) -> ValueTriple

Construct a triple with a value object.

Values may only appear in the object position.

pub fn new_string_value( subject: &str, predicate: &str, object: &str ) -> ValueTriple

Construct a triple with a string value object.

Values may only appear in the object position.

Examples found in repository

examples/write_to_graph.rs (line 29)

async fn parse_command(s: &str) -> io::Result<Command> {
    lazy_static! {
        static ref RE: Regex =
            Regex::new(r"(\S*)\s*(\S*)\s*,\s*(\S*)\s*,\s*(\S*)\s*(\S*)\s*").unwrap();
    }

    if let Some(matches) = RE.captures(s) {
        let command_name = &matches[1];
        let subject = &matches[2];
        let predicate = &matches[3];
        let object_type_name = &matches[4];
        let object = &matches[5];

        let triple = match object_type_name {
            "node" => ValueTriple::new_node(subject, predicate, object),
            "value" => ValueTriple::new_string_value(subject, predicate, object),
            _ => {
                return Err(io::Error::new(
                    io::ErrorKind::InvalidData,
                    format!("invalid object type {}", object_type_name),
                ))
            }
        };

        match command_name {
            "add" => Ok(Command::Add(triple)),
            "remove" => Ok(Command::Remove(triple)),
            _ => Err(io::Error::new(
                io::ErrorKind::InvalidData,
                format!("invalid command {}", command_name),
            )),
        }
    } else {
        Err(io::Error::new(
            io::ErrorKind::InvalidData,
            format!("could not match line {}", s),
        ))
    }
}

pub fn to_unresolved(self) -> PartiallyResolvedTriple

Convert this triple to a PartiallyResolvedTriple, marking each field as unresolved.

Trait Implementations

impl Clone for ValueTriple

fn clone(&self) -> ValueTriple

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ValueTriple

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

Formats the value using the given formatter.

impl Hash for ValueTriple

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 Ord for ValueTriple

fn cmp(&self, other: &ValueTriple) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for ValueTriple

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for ValueTriple

fn partial_cmp(&self, other: &ValueTriple) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for ValueTriple

impl StructuralPartialEq for ValueTriple