public double Match()
{
try
{
Transparency = FingerprintTransparency.Current;
ReportSupport = Transparency.AcceptsPairing();
int totalRoots = EnumerateRoots();
// https://sourceafis.machinezoo.com/transparency/root-pairs
Transparency.LogRootPairs(totalRoots, Roots);
double high = 0;
int best = -1;
for (int i = 0; i < totalRoots; ++i)
{
double score = TryRoot(Roots[i]);
if (best < 0 || score > high)
{
high = score;
best = i;
}
ClearPairing();
}
// https://sourceafis.machinezoo.com/transparency/best-match
Transparency.LogBestMatch(best);
return(high);
}
catch (Exception)
{
CurrentInstance = new MatcherThread();
throw;
}
finally
{
Transparency = null;
}
}
/// <summary>Deactivates transparency logging and releases system resources held by this instance if any.</summary>
/// <remarks>
/// <para>
/// This method is normally called automatically when <c>FingerprintTransparency</c> is used in <c>using</c> statement.
/// </para>
/// <para>
/// Deactivation stops transparency data logging to this instance of <c>FingerprintTransparency</c>.
/// Logging thus takes place between invocation of constructor (<see cref="FingerprintTransparency()" />) and invocation of this method.
/// If activations were nested, this method reactivates the outer <c>FingerprintTransparency</c>.
/// </para>
/// <para>
/// Subclasses can override this method to perform cleanup.
/// Default implementation of this method performs deactivation.
/// It must be called by overriding methods for deactivation to work correctly.
/// </para>
/// </remarks>
/// <seealso cref="FingerprintTransparency()" />
public void Dispose()
{
if (!Disposed)
{
Disposed = true;
CurrentInstance = Outer;
Outer = null;
}
}
/// <summary>Creates an instance of <c>FingerprintTransparency</c> and activates it.</summary>
/// <remarks>
/// <para>
/// Activation places the new <c>FingerprintTransparency</c> instance in thread-local storage,
/// which causes all operations executed by current thread to log data to this <c>FingerprintTransparency</c> instance.
/// If activations are nested, data is only logged to the currently innermost <c>FingerprintTransparency</c>.
/// </para>
/// <para>
/// Deactivation happens in <see cref="Dispose()" /> method.
/// Instances of <c>FingerprintTransparency</c> should be created in <c>using</c> statement
/// to ensure that <see cref="Dispose()" /> is always called.
/// </para>
/// <para>
/// <c>FingerprintTransparency</c> is an abstract class.
/// This constructor is only called by subclasses.
/// </para>
/// </remarks>
/// <seealso cref="Dispose()" />
protected FingerprintTransparency()
{
Outer = CurrentInstance;
CurrentInstance = this;
}