private void writeVersionNeededToExtractAndGeneralPurposeBits(
final int zipMethod, final boolean utfFallback, final boolean zip64) throws IOException {
// CheckStyle:MagicNumber OFF
int versionNeededToExtract = INITIAL_VERSION;
GeneralPurposeBit b = new GeneralPurposeBit();
b.useUTF8ForNames(useUTF8Flag || utfFallback);
if (zipMethod == DEFLATED && raf == null) {
// requires version 2 as we are going to store length info
// in the data descriptor
versionNeededToExtract = DATA_DESCRIPTOR_MIN_VERSION;
b.useDataDescriptor(true);
}
if (zip64) {
versionNeededToExtract = ZIP64_MIN_VERSION;
}
// CheckStyle:MagicNumber ON
// version needed to extract
writeOut(ZipShort.getBytes(versionNeededToExtract));
// general purpose bit flag
writeOut(b.encode());
}
