Trait rapidquery::Resolver[−][src]

pub trait Resolver<V> where
    V: BitAndAssign + BitOrAssign + Not, {
    type Error;
    fn resolve_tag(&self, tag: &str) -> Result<V, Self::Error>;
    fn resolve_key_value(
        &self, 
        key: &str, 
        value: &str
    ) -> Result<V, Self::Error>;
    fn resolve_key(&self, key: &str) -> Result<V, Self::Error>;
    fn resolve_children(&self, parent_id: &str) -> Result<V, Self::Error>;
    fn resolve_empty(&self) -> Result<V, Self::Error>;
}

Expand description

Trait describing a query context resolver.

The resolver is needed by RapidQuery to provide the initial values for computing the query.

For instance, when evaluating the query (a || b) && c, the evaluator will call Resolver::load_tag() with a, b, and c. From there, it’ll be in a position to compute the final result of the query.

Associated Types

type Error[src]

The error type returned by the resolver.

Required methods

fn resolve_tag(&self, tag: &str) -> Result<V, Self::Error>[src]

Resolves the set matching a given tag.

fn resolve_key_value(&self, key: &str, value: &str) -> Result<V, Self::Error>[src]

Resolves the set matching a given key/value pair.

fn resolve_key(&self, key: &str) -> Result<V, Self::Error>[src]

Resolves the set matching any key/value pairs with the given key.

fn resolve_children(&self, parent_id: &str) -> Result<V, Self::Error>[src]

Resolves the set matching a given parent ID.

fn resolve_empty(&self) -> Result<V, Self::Error>[src]

Resolves the set of all possible items that could match a query.

Implementations on Foreign Types

impl<V, E> Resolver<V> for Box<dyn Resolver<V, Error = E>> where
    V: BitAndAssign + BitOrAssign + Not,

[src]

type Error = E