Module icu_provider_blob::export

Data generation for BlobDataProvider data. See the icu_datagen crate.

Examples

use icu_provider::datagen::DataExporter;
use icu_provider::dynutil::*;
use icu_provider::hello_world::*;
use icu_provider::prelude::*;
use icu_provider_blob::export::BlobExporter;
use icu_provider_blob::BlobDataProvider;
use std::borrow::Cow;
use std::io::Read;
use std::rc::Rc;

let mut buffer: Vec<u8> = Vec::new();

let payload = DataPayload::<HelloWorldV1Marker>::from_owned(HelloWorldV1 {
    message: Cow::Borrowed("Hi"),
});

// Export something
{
    let mut exporter = BlobExporter::new_with_sink(Box::new(&mut buffer));
    exporter
        .put_payload(
            HelloWorldV1Marker::KEY,
            &Default::default(),
            &UpcastDataPayload::upcast(payload.clone()),
        )
        .expect("Should successfully export");
    exporter
        .close()
        .expect("Should successfully dump to buffer");
}

// Create a blob provider reading from the buffer
let provider =
    BlobDataProvider::try_new_from_blob(buffer.into_boxed_slice())
        .expect("Should successfully read from buffer");

// Read the key from the filesystem and ensure it is as expected
let req = DataRequest {
    locale: Default::default(),
    metadata: Default::default(),
};
let response: DataPayload<HelloWorldV1Marker> = provider
    .as_deserializing()
    .load(req)
    .unwrap()
    .take_payload()
    .unwrap();

assert_eq!(response.get(), payload.get(),);

Structs

• BlobExporter
  A data exporter that writes data to a single-file blob. See the module-level docs for an example.