internal VowpalWabbitSerializer(Func <TExample, IVowpalWabbitExample> serializer, VowpalWabbitSerializerSettings settings)
{
this.serializer = serializer;
this.settings = settings ?? new VowpalWabbitSerializerSettings();
var cacheableAttribute = (CacheableAttribute)typeof(TExample).GetCustomAttributes(typeof(CacheableAttribute), true).FirstOrDefault();
if (cacheableAttribute == null)
{
return;
}
if (this.settings.EnableExampleCaching)
{
if (cacheableAttribute.EqualityComparer == null)
{
this.exampleCache = new Dictionary <TExample, VowpalWabbitCachedExample <TExample> >();
}
else
{
if (!typeof(IEqualityComparer <TExample>).IsAssignableFrom(cacheableAttribute.EqualityComparer))
{
throw new ArgumentException(
string.Format(
CultureInfo.InvariantCulture,
"EqualityComparer ({1}) specified in [Cachable] of {0} must implement IEqualityComparer<{0}>",
typeof(TExample),
cacheableAttribute.EqualityComparer));
}
var comparer = (IEqualityComparer <TExample>)Activator.CreateInstance(cacheableAttribute.EqualityComparer);
this.exampleCache = new Dictionary <TExample, VowpalWabbitCachedExample <TExample> >(comparer);
}
}
}
public static VowpalWabbitSerializer <TExample> CreateSerializer <TExample>(VowpalWabbitInterfaceVisitor visitor, VowpalWabbitSerializerSettings settings)
{
var serializerFunc = CreateSerializer <TExample, VowpalWabbitInterfaceVisitor, VowpalWabbitExample>();
if (serializerFunc == null)
{
// if no features are found, no serializer is generated
serializerFunc = (_, __) => null;
}
return(new VowpalWabbitSerializer <TExample>(ex => serializerFunc(ex, visitor), settings));
}