Cucumber Messages for Java (JSON schema)

Reading

Path path = ...
NdjsonToMessageReader.Deserializer deserializer = ... 
try (NdjsonToMessageReader reader = new NdjsonToMessageReader(newInputStream(path), deserializer)) {
    return reader.lines()
    // Do something with messages
    .collect(Collectors.toList());
}

Writing

Path path = ...
MessageToNdjsonWriter.Serializer serializer = ...
try(MessageToNdjsonWriter writer = new MessageToNdjsonWriter(newOutputStream(path), serializer)){
    for(Envelope envelope : messages){
        writer.write(envelope);
    }
}

See Unit tests for more examples.