final String[] mdNames = b.reader.getMetadataNames(); if ((mdNames != null) && (mdNames.length > 0)) { for (final String mdName : mdNames) {
if (writer == null) { final Map<String, String> metadata = new HashMap<>(); final String[] mdNames = reader.getMetadataNames(); if ((mdNames != null) && (mdNames.length > 0)) { for (final String mdName : mdNames) {