Trait json_ld::Loader

pub trait Loader<I, M> {
    type Output;
    type Error;

    fn load_with<'a>(
        &'a mut self,
        vocabulary: &'a mut impl Sync + Send + IriVocabularyMut<Iri = I>,
        url: I
    ) -> Pin<Box<dyn Future<Output = Result<RemoteDocument<I, M, Self::Output>, Self::Error>> + Send + 'a, Global>>
    where
        I: 'a;

    fn load<'a>(
        &'a mut self,
        url: I
    ) -> Pin<Box<dyn Future<Output = Result<RemoteDocument<I, M, Self::Output>, Self::Error>> + Send + 'a, Global>>
    where
        I: 'a,
        (): IriVocabulary<Iri = I>,
    { ... }
}

Document loader.

A document loader is required by most processing functions to fetch remote documents identified by an IRI.

This library provides a few default loader implementations:

• NoLoader dummy loader that always fail. Perfect if you are certain that the processing will not require any loading.
• FsLoader that redirect registered IRI prefixes to a local directory on the file system. This way no network calls are performed and the loaded content can be trusted.
• ReqwestLoader that actually download the remote documents using the reqwest library. This requires the reqwest feature to be enabled.

Required Associated Types

type Output

The type of documents that can be loaded.

type Error

Error type.

Required Methods

fn load_with<'a>(
    &'a mut self,
    vocabulary: &'a mut impl Sync + Send + IriVocabularyMut<Iri = I>,
    url: I
) -> Pin<Box<dyn Future<Output = Result<RemoteDocument<I, M, Self::Output>, Self::Error>> + Send + 'a, Global>>where
    I: 'a,

Loads the document behind the given IRI, using the given vocabulary.

Provided Methods

fn load<'a>(
    &'a mut self,
    url: I
) -> Pin<Box<dyn Future<Output = Result<RemoteDocument<I, M, Self::Output>, Self::Error>> + Send + 'a, Global>>where
    I: 'a,
    (): IriVocabulary<Iri = I>,

Loads the document behind the given IRI.

Implementors

impl<I, T, M> Loader<I, M> for NoLoader<I, M, T>where
    I: Send,

type Output = T

type Error = CannotLoad<I>

impl<I, T, M, E> Loader<I, M> for FsLoader<I, M, T, E>where
    I: Send,
    T: Send,
    M: Send,

type Output = T

type Error = Error<E>