public string GetCourseID(IRowSource rowSource)
{
DuplicateInfo dup = _key_set_list.GetDuplicateBy(_condition, rowSource);
if (dup != null)
{
return(dup.Record["CourseID"]);
}
else
{
return(string.Empty);
}
}
protected override IExpression ConvertArrayIndexer(IArrayIndexerExpression iaie)
{
IArrayIndexerExpression aie = (IArrayIndexerExpression)base.ConvertArrayIndexer(iaie);
IExpression topExpr = context.FindAncestor <IAssignExpression>();
bool isDef = false;
if (topExpr == null)
{
topExpr = context.FindAncestor <IMethodInvokeExpression>();
if (Recognizer.IsStaticMethod(topExpr, typeof(InferNet)))
{
return(aie);
}
}
else
{
isDef = ((IAssignExpression)topExpr).Target == iaie;
}
if (topExpr == null)
{
return(aie);
}
// Find the variable algorithm
IVariableDeclaration ivd = Recognizer.GetVariableDeclaration(iaie.Target);
if (ivd == null)
{
//Error("Cannot find array indexer target variable: " + iaie.Target);
return(iaie);
}
IAlgorithm varAlg = GetAlgorithm(ivd);
//Console.WriteLine("varAlg=" + varAlg + " " + ivd);
// Find the factor algorithm
IAlgorithm factorAlg = GetAlgorithm(topExpr);
// If the algorithsm are the same, do nothing.
if (varAlg.Equals(factorAlg))
{
return(aie);
}
// Otherwise, look up conversion operator
ChannelInfo ci = context.InputAttributes.Get <ChannelInfo>(ivd);
if (ci == null)
{
Error("Channel information not found for '" + ivd.Name + "'.");
return(aie);
}
Type chType = ci.varInfo.marginalPrototypeExpression.GetExpressionType();
List <object> extraArgs = new List <object>();
MethodReference opMethodRef = null;
try
{
opMethodRef = factorAlg.GetAlgorithmConversionOperator(chType, varAlg, isDef, extraArgs);
}
catch (Exception ex)
{
Error("No conversion operator defined from " + factorAlg + " to " + varAlg, ex);
return(aie);
}
if (opMethodRef == null)
{
return(aie);
}
// Create new channel
DuplicateInfo dupInfo = context.InputAttributes.GetOrCreate <DuplicateInfo>(ivd, () => new DuplicateInfo());
dupInfo.dupCount++;
IVariableDeclaration vd = Builder.VarDecl(ivd.Name + "_dup" + dupInfo.dupCount, ivd.VariableType);
Context.InputAttributes.CopyObjectAttributesTo(ivd, context.OutputAttributes, vd);
Context.OutputAttributes.Remove <Algorithm>(vd);
Context.OutputAttributes.Set(vd, new Algorithm(factorAlg));
//ci.AddDeclaration(context);
IExpression opMethodCall = null;
IExpression[] args = new IExpression[extraArgs.Count + 1];
IExpression lhs = Builder.ArrayIndex(Builder.VarRefExpr(vd), Builder.LiteralExpr(0));
args[0] = aie;
if (isDef)
{
args[0] = lhs;
lhs = aie;
}
for (int i = 0; i < extraArgs.Count; i++)
{
args[i + 1] = Builder.LiteralExpr(extraArgs[i]);
}
if (opMethodRef.TypeParameterCount == 0)
{
opMethodCall = Builder.StaticMethod(opMethodRef.GetMethodInfo(), args);
}
else
{
// TODO: insert argument types
opMethodCall = Builder.StaticGenericMethod(opMethodRef.GetMethodInfo(), args);
}
//context.AddExpression(Builder.AssignExpr(lhs,opMethodCall));
return(Builder.ArrayIndex(Builder.VarRefExpr(vd), Builder.LiteralExpr(0)));
}