/// <summary>
/// Generates the code that processes each incoming document, in order to gather information for features.
/// </summary>
/// <param name="script"></param>
/// <returns></returns>
private string ProcessFeaturePrepContent(string donutfileContent, DonutScript script)
{
string aggregateKeyContent = GetAggregateKeyExtraction(script, "aggKeyBuff");
var placeholder = "$ExtractionBody";
var donutCV = new DonutFeatureGeneratingExpressionVisitor(script);
var donutFeatureGen = new DonutFeatureCodeGenerator(script, donutCV);
var donutFeatures = script.Features.Where(x => x.IsDonutNativeFeature());
donutFeatureGen.AddAll(donutFeatures);
var donutFeatureCode = donutFeatureGen.GetScriptContent(donutfileContent);
donutFeatureCode.PrepareScript = aggregateKeyContent + donutFeatureCode.PrepareScript;
donutfileContent = donutfileContent.Replace(placeholder, donutFeatureCode.PrepareScript);
return(donutfileContent);
}
public DonutCodeFeatureDefinition GetTemplate(CallExpression exp, DonutCodeContext ctx)
{
var rootIgn = ctx.Script.GetRootIntegration();
var expVisitor = new DonutFeatureGeneratingExpressionVisitor(ctx.Script);
var callParam = exp.Parameters.FirstOrDefault();
var parameterTarget = expVisitor.Visit(callParam);
if (parameterTarget.ToString() == "document[\"\"]")
{
return(DonutCodeFeatureDefinition.Empty);
}
var buffGather = new StringBuilder();
var buffExtract = new StringBuilder();
var paramHash = HashAlgos.Adler32(callParam.ToString());
string featureKey = $"nu_{rootIgn.Name}_{paramHash}";
var categoryValue = "groupKey"; //Use the group key generated from DonutScriptCodeGenerator..
string ordered = "true";
string varCategory = $"{featureKey}_cat";
string varValue = $"{featureKey}_val";
string varCategoryVal = $"var {varCategory} = {categoryValue};";
string varValueVal = $"var {varValue} = {parameterTarget}.ToString();";
buffGather.AppendLine(varCategoryVal);
buffGather.AppendLine(varValueVal);
buffGather.AppendLine($"Context.AddEntityMetaCategory(\"{featureKey}\", {varCategory}, {varValue}, {ordered});");
buffExtract.AppendLine($"Context.GetSetSize(\"{featureKey}\")");
var featureDef = new DonutCodeFeatureDefinition()
{
PrepareScript = buffGather.ToString(),
ExtractionScript = buffExtract.ToString()
};
//Feature value:
//Context.GetSetSize()
//
//Define a nameOfTheResultCache, category, value
//Set the value in the cache
return(featureDef);
/**
* Example
* //Extraction goes in here
* var nuRomanianpm25Category = 1;
* var nuRomanianpm25Value = intDoc["pm25"].ToString();
* Context.AddEntityMetaCategory("nu_Romanian.pm25", nuRomanianpm25Category, nuRomanianpm25Value, true);
*/
}
public DonutFeatureCodeGenerator(DonutScript script, DonutFeatureGeneratingExpressionVisitor expVisitor) : base(script)
{
_donutFnResolver = new DonutFunctions();
_rootIntegration = script.Integrations.FirstOrDefault();
if (_rootIntegration == null)
{
throw new InvalidIntegrationException("Script has no integrations");
}
if (_rootIntegration.Fields == null || _rootIntegration.Fields.Count == 0)
{
throw new InvalidIntegrationException("Integration has no fields");
}
_rootDataMember = script.GetDatasetMember(_rootIntegration.Name);
_outputCollection = _rootIntegration.FeaturesCollection;
if (string.IsNullOrEmpty(_outputCollection))
{
throw new InvalidOperationException("Root integration must have a features collection set.");
}
_expVisitor = expVisitor ?? throw new ArgumentNullException(nameof(expVisitor));
_functions = new List <IDonutFunction>();
}