internal static Expression <Func <TFact, List <DataPoint> > > GenerateFactDataPointsExpression <TInput, TFact, TResult>(Expression <Func <TInput, TFact, TResult> > expression)
{
var factParam = expression.Parameters[1];
var factParamExpression = new ParameterVisitor(factParam.Name);
factParamExpression.Visit(expression);
return(Expression.Lambda <Func <TFact, List <DataPoint> > >(body:
Expression.ListInit(newExpression: Expression.New(_listOfDataPointConstructor), initializers: factParamExpression.Members.Select(m =>
Expression.MemberInit(newExpression: Expression.New(_dataPointConstructor),
Expression.Bind(_nameProperty, Expression.Constant(m.Name)),
Expression.Bind(_valueProperty, Expression.Convert(expression: Expression.Property(factParam, m), typeof(object))))
)), factParam));
}
internal static Expression <Func <TInput, List <DataPoint> > > GenerateInputDataPointsExpression <TInput, TFact, TResult>(Expression <Func <TInput, TFact, TResult> > expression)
{
var inputParam = expression.Parameters[0];
var inputParamExpressions = new ParameterVisitor(inputParam.Name);
inputParamExpressions.Visit(expression);
return(input => new List <DataPoint> (inputParamExpressions.Members.Select(m => new DataPoint()
{
Name = m.Name,
Value = m.GetValue(input, null)
})));
//return Expression.Lambda<Func<TInput, List<DataPoint>>>(body:
// Expression.ListInit(newExpression: Expression.New(_listOfDataPointConstructor), initializers: inputParamExpressions.Members.Select(m =>
// Expression.MemberInit(newExpression: Expression.New(_dataPointConstructor),
// Expression.Bind(_nameProperty, Expression.Constant(m.Name)),
// Expression.Bind(_valueProperty, Expression.Convert(expression: Expression.Property(inputParam, m), typeof(object))))
// )), inputParam);
}