An example of a custom response converter for Retrofit

PasteListConverter.java

class PasteListConverter implements Converter<ResponseBody, List<Paste>> {

    private final Serializer serializer;
    
    PasteListConverter() {
        serializer = new Persister(new AnnotationStrategy());
    }
    
    @Override
    public List<Paste> convert(ResponseBody value) throws IOException {
        String originalResponse = value.string();
        String correctedResponse = "<pastes>\r\n" + originalResponse + "\r\n</pastes>";
        try {
            PasteGroup pasteGroup = serializer.read(PasteGroup.class, correctedResponse);
            return pasteGroup.getPasteList();
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    @Root(name = "pastes", strict = false)
    private static class PasteGroup {

        @ElementList(name = "pastes", inline = true, required = false)
        private List<Paste> pasteList;

        PasteGroup(@ElementList(name = "pastes", inline = true, required = false) List<Paste> pasteList) {
            this.pasteList = pasteList;
        }

        List<Paste> getPasteList() {
            return pasteList;
        }
    }
}