public static IEnumerable AddFilterToSnap(SqlBytes arrayBinary, short snap, int phkey)
{
List<object[]> results = new List<object[]>();
SqlBigIntArrayMax myIds = new SqlBigIntArrayMax(arrayBinary);
const int expectedFilterCapacity = 1000;
float errorRate = BloomFilter.Filter<long>.bestErrorRate(expectedFilterCapacity);
int hashFunctions = BloomFilter.Filter<long>.bestK(expectedFilterCapacity, errorRate);
BloomFilter.Filter<long> filter = new BloomFilter.Filter<long>(expectedFilterCapacity, errorRate, hashFunctions);
long[] idsArray = myIds.ToArray();
for (int i = 0; i < idsArray.Length; i++)
{
filter.Add(idsArray[i]);
}
object[] item = { snap, phkey, filter.convertToByteArray(), hashFunctions, expectedFilterCapacity };
results.Add(item);
return results;
//finalFilter = filter.convertToByteArray();
}
public DefaultPreFilterService(IStoreService storeService)
{
this.storeService = storeService;
filter = BloomFilter.FilterBuilder.Build <string>(int.MaxValue);
}
public URLStorageBloomFilter(int maxItems)
{
bloomFilter = new BloomFilter.Filter<string>(maxItems);
}
public static SqlInt32 checkFilterForId(SqlBinary filterAsBinary, SqlInt64 id, SqlInt32 hashFunctions)
{
BloomFilter.Filter<long> filter = new BloomFilter.Filter<long>((byte[])filterAsBinary, (int)hashFunctions);
return filter.Contains((long)id) ? 1 : 0;
}
