public static NumberFilter deserializeFromFile(Context context) {
try {
FileInputStream fis = context.openFileInput(DIRECTORY_FILE);
NumberFilterStorage storage = NumberFilterStorage.fromStream(fis);
return new NumberFilter(
new BloomFilter(Base64.decode(storage.getFilterData()), storage.getHashCount()));
} catch (IOException ioe) {
Log.w("NumberFilter", ioe);
return new NumberFilter(null);
}
}
public void serializeToFile(Context context) {
if (this.bloomFilter == null) return;
try {
FileOutputStream fout = context.openFileOutput(DIRECTORY_FILE, 0);
String numberFilter = Base64.encodeBytes(bloomFilter.getFilter());
NumberFilterStorage storage =
new NumberFilterStorage(numberFilter, bloomFilter.getHashCount());
storage.serializeToStream(fout);
fout.close();
} catch (IOException ioe) {
Log.w("NumberFilter", ioe);
}
}
