protected override Expression VisitMemberAccess(MemberExpression memberExpression)
{
TableFindResult result = this.tableFinder.Find(memberExpression);
if (this.table == null)
{
this.table = result;
}
else if (Table != result.Table || result.MimeType != this.table.MimeType)
{
Fallback = true;
return(memberExpression);
}
ContentResolverColumnMapping cmap = this.tableFinder.GetColumn(memberExpression.Member);
if (cmap == null || cmap.Columns == null)
{
Fallback = true;
return(memberExpression);
}
this.currentMap = cmap;
if (cmap.Columns.Length == 1)
{
this.builder.Append(cmap.Columns[0]);
}
else
{
throw new NotSupportedException();
}
return(base.VisitMemberAccess(memberExpression));
}
// private Expression VisitSelect (MethodCallExpression methodCall)
// {
// List<MemberExpression> mes = MemberExpressionFinder.Find (methodCall.Arguments[1], this.tableFinder);
// if (!TryGetTable (mes))
// return methodCall;
//
// Type returnType = null;
//
// List<Tuple<string, Type>> projs = new List<Tuple<string, Type>>();
// foreach (MemberExpression me in mes)
// {
// Tuple<string, Type> column = this.tableFinder.GetColumn (me.Member);
// if (column == null)
// return methodCall;
//
// if (returnType == null)
// returnType = column.Item2;
// if (returnType != column.Item2)
// return methodCall;
//
// projs.Add (column);
// }
//
// ReturnType = returnType;
// this.fallback = true;
//
// (this.projections ?? (this.projections = new List<Tuple<string, Type>>()))
// .AddRange (projs);
//
// return methodCall.Arguments[0];
// }
private Expression VisitSelectMany(MethodCallExpression methodCall)
{
List <MemberExpression> mes = MemberExpressionFinder.Find(methodCall, this.tableFinder);
if (mes.Count > 1)
{
this.fallback = true;
return(methodCall);
}
if (!TryGetTable(mes))
{
return(methodCall);
}
ContentResolverColumnMapping column = this.tableFinder.GetColumn(mes[0].Member);
if (column == null || column.ReturnType.GetGenericTypeDefinition() != typeof(IEnumerable <>))
{
this.fallback = true;
return(methodCall);
}
ReturnType = column.ReturnType.GetGenericArguments()[0];
return(Expression.Constant(Activator.CreateInstance(typeof(Query <>).MakeGenericType(ReturnType), this.provider)));
//return methodCall.Arguments[0];
}
private Expression VisitSelect(MethodCallExpression methodCall)
{
MemberExpression me = FindMemberExpression(methodCall.Arguments[1]);
if (!TryGetTable(me))
{
return(methodCall);
}
ContentResolverColumnMapping column = this.tableFinder.GetColumn(me.Member);
if (column == null || column.Columns == null)
{
return(methodCall);
}
(this.projections ?? (this.projections = new List <ContentResolverColumnMapping>())).Add(column);
if (column.ReturnType.IsValueType || column.ReturnType == typeof(string))
{
ReturnType = column.ReturnType;
}
this.fallback = true;
Type argType = GetExpressionArgumentType(methodCall.Arguments[0]);
if (ReturnType == null || (argType != null && ReturnType.IsAssignableFrom(argType)))
{
return(methodCall.Arguments[0]);
}
return(Expression.Constant(Activator.CreateInstance(typeof(Query <>).MakeGenericType(ReturnType), this.provider)));
}
private Expression VisitOrder(MethodCallExpression methodCall)
{
MemberExpression me = FindMemberExpression(methodCall.Arguments[1]);
if (!TryGetTable(me))
{
return(methodCall);
}
ContentResolverColumnMapping column = this.tableFinder.GetColumn(me.Member);
if (column != null && column.Columns != null)
{
StringBuilder builder = this.sortBuilder ?? (this.sortBuilder = new StringBuilder());
if (builder.Length > 0)
{
builder.Append(", ");
}
if (column.Columns.Length > 1)
{
throw new NotSupportedException();
}
builder.Append(column.Columns[0]);
if (methodCall.Method.Name == "OrderByDescending")
{
builder.Append(" DESC");
}
return(methodCall.Arguments[0]);
}
return(methodCall);
}
protected override Expression VisitMemberAccess(MemberExpression memberExpression)
{
TableFindResult result = this.tableFinder.Find(memberExpression);
if (this.table == null)
this.table = result;
else if (Table != result.Table || result.MimeType != this.table.MimeType)
{
Fallback = true;
return memberExpression;
}
ContentResolverColumnMapping cmap = this.tableFinder.GetColumn(memberExpression.Member);
if (cmap == null || cmap.Columns == null)
{
Fallback = true;
return memberExpression;
}
this.currentMap = cmap;
if (cmap.Columns.Length == 1)
this.builder.Append(cmap.Columns[0]);
else
throw new NotSupportedException();
return base.VisitMemberAccess(memberExpression);
}
