bincache 0.5.1

ZitaneLabs binary cache.
Documentation 
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use std::borrow::Cow;

use crate::Result;
use async_trait::async_trait;

/// A compression strategy.
#[async_trait]
pub trait CompressionStrategy: std::fmt::Debug {
    /// Compress binary data
    async fn compress<'a>(&self, data: Cow<'a, [u8]>) -> Result<Cow<'a, [u8]>>;
    /// Decompress binary data
    async fn decompress<'a>(&self, value: Cow<'a, [u8]>) -> Result<Cow<'a, [u8]>>;
}

#[async_trait]
impl<T: CompressionStrategy + Sync + Send> CompressionStrategy for Option<T> {
    async fn compress<'a>(&self, data: Cow<'a, [u8]>) -> Result<Cow<'a, [u8]>> {
        match self {
            Some(compressor) => compressor.compress(data).await,
            None => Ok(data),
        }
    }

    async fn decompress<'a>(&self, value: Cow<'a, [u8]>) -> Result<Cow<'a, [u8]>> {
        match self {
            Some(compressor) => compressor.decompress(value).await,
            None => Ok(value),
        }
    }
}