InputStreamSource class abstract interface

A simple interface for objects that provide an InputStream.

This abstraction is useful for generic access to stream-based content (e.g., files, network streams, in-memory data) without tying the implementation to a specific resource type.

It is typically used in configuration loaders, template resolvers, or file/resource access APIs.

Example Usage

class FileInputStreamSource implements InputStreamSource {
  final File file;

  FileInputStreamSource(this.file);

  @override
  InputStream getInputStream() {
    return FileInputStream(file);
  }
}

In JetLeaf, this is a core abstraction used to generalize resource access.