Enum splinter::registry::MetadataPredicate

pub enum MetadataPredicate {
    Eq(String, String),
    Ne(String, String),
    Gt(String, String),
    Ge(String, String),
    Lt(String, String),
    Le(String, String),
}

A predicate on a key/value pair in a Node’s metadata table.

Each variant is an operator, and supplies a tuple representing a key/value pair. It is applied by the comparison operator on the value found at the given key (the first item in the tuple) against the predicate’s value (the second item in the tuple).

If the item is missing in a node’s metadata table, the predicate returns false (with the exception of the Ne variant).

Variants

Eq(String, String)

Applies the == operator.

Ne(String, String)

Applies the != operator.

Gt(String, String)

Applies the > operator.

Ge(String, String)

Applies the >= operator.

Lt(String, String)

Applies the < operator.

Le(String, String)

Applies the <= operator.

Implementations

impl MetadataPredicate

pub fn apply(&self, node: &Node) -> bool

Apply this predicate against a given node.

pub fn eq<S: Into<String>>(key: S, value: S) -> MetadataPredicate

Returns the Eq predicate for the given key and value

pub fn ne<S: Into<String>>(key: S, value: S) -> MetadataPredicate

Returns the Ne predicate for the given key and value

Trait Implementations

impl Clone for MetadataPredicate

fn clone(&self) -> MetadataPredicate

Returns a copy of the value.

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

Performs copy-assignment from source.