/// <summary> Returns the cached version of the filter. Allows the caller to pass up
/// a small filter but this will keep a persistent version around and allow
/// the caching filter to do its job.
///
/// </summary>
/// <param name="filter">The input filter
/// </param>
/// <returns> The cached version of the filter
/// </returns>
public virtual Filter GetFilter(Filter filter)
{
lock (cache)
{
FilterItem fi = null;
fi = cache[filter.GetHashCode()];
if (fi != null)
{
fi.timestamp = System.DateTime.UtcNow.Ticks;
return(fi.filter);
}
cache[filter.GetHashCode()] = new FilterItem(filter);
return(filter);
}
}
public override int GetHashCode()
{
return(filter.GetHashCode() ^ 0x1117BF25);
}
/// <summary>Returns a hash code value for this object. </summary>
public override int GetHashCode()
{
return(query.GetHashCode() ^ filter.GetHashCode() + System.Convert.ToInt32(Boost));
}
/// <summary>Returns a hash code value for this object. </summary>
public override int GetHashCode()
{
// Simple add is OK since no existing filter hashcode has a float component.
return(internalFilter.GetHashCode() + BitConverter.ToInt32(BitConverter.GetBytes(Boost), 0));
}