/// <summary> /// We want to print the results out to a file. /// </summary> /// <param name="resultOperator"></param> /// <param name="queryModel"></param> /// <param name="_codeEnv"></param> /// <param name="_codeContext"></param> /// <param name="container"></param> /// <returns></returns> /// <remarks> /// We can handle several types of streams here: /// 1) a stream of double's - this is just one column. /// 2) A stream of Tuples /// 3) A stream of custom objects /// </remarks> public override Expression ProcessResultOperator(ResultOperatorBase resultOperator, QueryModel queryModel, IGeneratedQueryCode gc, ICodeContext cc, CompositionContainer container) { // Argument checking var asCSV = resultOperator as AsCSVResultOperator; if (asCSV == null) { throw new ArgumentException("resultOperaton"); } // Declare the includes. gc.AddIncludeFile("<fstream>"); gc.AddIncludeFile("<iostream>"); // The output filename. How we do this is a little funny because we need the hash from the completely // done query, which isn't ready just yet. var outputFile = GenerateUniqueFile(asCSV.OutputFile, cc); var stream = DeclarableParameter.CreateDeclarableParameterExpression(typeof(OutputCSVTextFileType)); stream.InitialValue = new OutputCSVTextFileType(outputFile); var headerline = new StringBuilder(); bool first = true; foreach (var h in asCSV.HeaderColumns) { if (!first) { headerline.Append(","); } headerline.Append(h); first = false; } gc.AddInitalizationStatement(new Statements.StatementSimpleStatement($"{stream.RawValue} << \"{headerline.ToString()}\" << std::endl;", dependentVars: new string[0], resultVars: new string[] { stream.RawValue })); // Get the list of item values we are going to need here. List <Expression> itemValues = ExtractItemValueExpressions(queryModel); // We are just going to print out the line with the item in it. var itemAsValues = itemValues.Select(iv => ExpressionToCPP.GetExpression(iv, gc, cc, container)); var pstatement = new StatementCSVDump(stream, itemAsValues.ToArray()); gc.Add(pstatement); // The return is a file path in the C# world. But here in C++, what should be returned? // We will use a string. return(stream); }
/// <summary> /// We want to print the results out to a file. /// </summary> /// <param name="resultOperator"></param> /// <param name="queryModel"></param> /// <param name="_codeEnv"></param> /// <param name="_codeContext"></param> /// <param name="container"></param> /// <returns></returns> /// <remarks> /// We can handle several types of streams here: /// 1) a stream of double's - this is just one column. /// 2) A stream of Tuples /// 3) A stream of custom objects /// </remarks> public override Expression ProcessResultOperator(ResultOperatorBase resultOperator, QueryModel queryModel, IGeneratedQueryCode gc, ICodeContext cc, CompositionContainer container) { // Argument checking var asCSV = resultOperator as AsCSVResultOperator; if (asCSV == null) throw new ArgumentException("resultOperaton"); // Declare the includes. gc.AddIncludeFile("<fstream>"); gc.AddIncludeFile("<iostream>"); // The output filename. How we do this is a little funny because we need the hash from the completely // done query, which isn't ready just yet. var outputFile = GenerateUniqueFile(asCSV.OutputFile, cc); var stream = DeclarableParameter.CreateDeclarableParameterExpression(typeof(OutputCSVTextFileType)); stream.InitialValue = new OutputCSVTextFileType(outputFile); var headerline = new StringBuilder(); bool first = true; foreach (var h in asCSV.HeaderColumns) { if (!first) { headerline.Append(", "); } headerline.Append(h); first = false; } gc.AddInitalizationStatement(new Statements.StatementSimpleStatement($"{stream.RawValue} << \"{headerline.ToString()}\" << std::endl;", dependentVars: new string[0], resultVars: new string[] { stream.RawValue })); // Get the list of item values we are going to need here. List<Expression> itemValues = ExtractItemValueExpressions(queryModel); // We are just going to print out the line with the item in it. var itemAsValues = itemValues.Select(iv => ExpressionToCPP.GetExpression(iv, gc, cc, container)); var pstatement = new StatementCSVDump(stream, itemAsValues.ToArray()); gc.Add(pstatement); // The return is a file path in the C# world. But here in C++, what should be returned? // We will use a string. return stream; }