adapter 0.1.0

Adapter provides a generic interface for plugins to interact with a host application.
Documentation 
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/// The Adapter trait is used to define the interface for an adapter.
/// An adapter is a component that is used to convert the input from a client
/// into a format that is understood by the service.

pub trait AdapterInput<'a> {}
pub trait AdapterOutput<'a> {}

pub trait Adapter<'a, Input, Output> {
    type Error;
    type Identifier;
    // type Input;
    // TODO: Use associated types?
    // The input and output types should be generic over the function call,
    // as they may differ.
    //
    // The identifier and error can be static.
    fn call(
        &'a mut self,
        identifier: Self::Identifier,
        input: Input,
    ) -> Result<Output, Self::Error>;
    // fn call<Input, Output>(&'a mut self, identifier: Self::Identifier, input: Input) -> Result<Output, Self::Error>
    //     where
    //         Input: AdapterInput<'a>,
    //         Output: AdapterOutput<'a>;
}