/// <summary>
/// Initializes a new <see cref="VowpalWabbitInterfaceVisitor"/> instance.
/// </summary>
/// <param name="vw">The associated vowpal wabbit instance.</param>
public VowpalWabbitInterfaceVisitor(VowpalWabbit vw)
{
this.vw = vw;
this.builder = null;
this.namespaceBuilder = null;
this.featureGroup = '\0';
this.namespaceHash = 0;
}
/// <summary>
/// Initializes a new instance of the <see cref="VowpalWabbitMarshalContext"/> class.
/// </summary>
/// <param name="vw">The VW instance the example will be imported to.</param>
/// <param name="exampleBuilder">A shared example builder.</param>
/// <param name="dictionary">Dictionary used for dictify operation.</param>
/// <param name="fastDictionary">Dictionary used for dictify operation.</param>
public VowpalWabbitMarshalContext(VowpalWabbit vw, VowpalWabbitExampleBuilder exampleBuilder, Dictionary<string, string> dictionary = null, Dictionary<object, string> fastDictionary = null)
{
this.VW = vw;
this.ExampleBuilder = exampleBuilder;
if (vw.Settings.EnableStringExampleGeneration)
{
this.StringExample = new StringBuilder();
this.Dictionary = dictionary;
this.FastDictionary = fastDictionary;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="VowpalWabbitMarshalContext"/> class.
/// </summary>
/// <param name="vw">The VW instance the example will be imported to.</param>
/// <param name="exampleBuilder">A shared example builder.</param>
/// <param name="dictionary">Dictionary used for dictify operation.</param>
/// <param name="fastDictionary">Dictionary used for dictify operation.</param>
public VowpalWabbitMarshalContext(VowpalWabbit vw, VowpalWabbitExampleBuilder exampleBuilder, Dictionary <string, string> dictionary = null, Dictionary <object, string> fastDictionary = null)
{
this.VW = vw;
this.ExampleBuilder = exampleBuilder;
if (vw.Settings.EnableStringExampleGeneration)
{
this.StringExample = new StringBuilder();
this.Dictionary = dictionary;
this.FastDictionary = fastDictionary;
}
}
public VowpalWabbitExample Visit(string label, IVisitableNamespace[] namespaces)
{
using (this.builder = new VowpalWabbitExampleBuilder(this.vw))
{
this.builder.Label = label;
foreach (var n in namespaces)
{
n.Visit();
}
return(this.builder.CreateExample());
}
}
private void Initialize(VowpalWabbitSerializerSettings settings)
{
var visitor = new VowpalWabbitInterfaceVisitor(this);
this.actionDependentFeatureSerializer = VowpalWabbitSerializerFactory.CreateSerializer <TActionDependentFeature>(visitor, settings);
if (this.actionDependentFeatureSerializer == null)
{
throw new ArgumentException(typeof(TActionDependentFeature) + " must have a least a single [Feature] defined.");
}
using (var exBuilder = new VowpalWabbitExampleBuilder(this))
{
this.emptyExample = exBuilder.CreateExample();
}
}
/// <summary>
/// Transfers namespace data to native space.
/// </summary>
/// <param name="label">The label.</param>
/// <param name="namespaces">The namespaces.</param>
/// <returns>The populated vowpal wabbit example.</returns>
public VowpalWabbitExample Visit(ILabel label, IVisitableNamespace[] namespaces)
{
Contract.Requires(namespaces != null);
using (this.builder = new VowpalWabbitExampleBuilder(this.vw))
{
if (label != null)
{
this.builder.ParseLabel(label.ToVowpalWabbitFormat());
}
foreach (var n in namespaces)
{
n.Visit();
}
return(this.builder.CreateExample());
}
}
