public string GetTemplate(CallExpression exp, DonutCodeContext ctx)
{
var callParam = exp.Parameters.FirstOrDefault();
NameExpression dsName = callParam.Value as NameExpression;
var targetExpression = ctx.Script.GetDatasetMember(dsName.Name);
if (targetExpression != null)
{
return($"\"${targetExpression.Integration.DataTimestampColumn}\"");
}
else
{
throw new Exception("Integration not found");
}
}
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);
*/
}
