/// <summary>
/// <c>true</c> when the filters are compatible, else <c>false</c>
/// </summary>
/// <typeparam name="TId">The type of entity identifier</typeparam>
/// <typeparam name="TCount">The type of the occurence counter for the invertible Bloom filter.</typeparam>
/// <typeparam name="TEntity">Type of the entity</typeparam>
/// <param name="filter">Bloom filter data</param>
/// <param name="otherFilter">The Bloom filter data to compare against</param>
/// <param name="configuration">THe Bloom filter configuration</param>
/// <returns></returns>
public static bool IsCompatibleWith <TEntity, TId, THash, TCount>(
this IInvertibleBloomFilterData <TId, THash, TCount> filter,
IInvertibleBloomFilterData <TId, THash, TCount> otherFilter,
IInvertibleBloomFilterConfiguration <TEntity, TId, THash, TCount> configuration)
where TId : struct
where TCount : struct
where THash : struct
{
if (filter == null || otherFilter == null)
{
return(true);
}
if (!filter.IsValid() || !otherFilter.IsValid())
{
return(false);
}
if (filter.IsReverse != otherFilter.IsReverse ||
filter.HashFunctionCount != otherFilter.HashFunctionCount ||
(filter.SubFilter != otherFilter.SubFilter &&
!filter.SubFilter.IsCompatibleWith(otherFilter.SubFilter, configuration.SubFilterConfiguration)))
{
return(false);
}
if (filter.BlockSize != otherFilter.BlockSize)
{
var foldFactors = configuration.FoldingStrategy?.GetFoldFactors(filter.BlockSize, otherFilter.BlockSize);
if (foldFactors?.Item1 > 1 || foldFactors?.Item2 > 1)
{
return(true);
}
}
return(filter.BlockSize == otherFilter.BlockSize &&
filter.IsReverse == otherFilter.IsReverse &&
filter.Counts?.LongLength == otherFilter.Counts?.LongLength);
}
/// <summary>
/// Set the data for this Bloom filter.
/// </summary>
/// <param name="data">The data to restore</param>
public virtual void Rehydrate(IInvertibleBloomFilterData <TId, int, TCount> data)
{
if (data == null)
{
return;
}
if (!data.IsValid())
{
throw new ArgumentException(
"Invertible Bloom filter data is invalid.",
nameof(data));
}
Data = data.ConvertToBloomFilterData(Configuration);
ValidateData();
}