|
public static MemberAccessIsAccessingDbContext ( MemberAccessExpressionSyntax memberExpr, SyntaxNodeAnalysisContext context, |
||
| memberExpr | MemberAccessExpressionSyntax | |
| context | SyntaxNodeAnalysisContext | |
| efContext | ||
| clsInfo | ||
| return | bool | |
static bool GetRootEntityTypeFromLinqQuery(ExpressionSyntax expr, SyntaxNodeAnalysisContext context, EFUsageContext efContext, out EFCodeFirstClassInfo clsInfo)
{
clsInfo = null;
// from $var in ???
var memberExpr = expr as MemberAccessExpressionSyntax;
var ident = expr as IdentifierNameSyntax;
if (memberExpr != null) //??? = $ident.$prop
{
return(LinqExpressionValidator.MemberAccessIsAccessingDbContext(memberExpr, context, efContext, out clsInfo));
}
else if (ident != null)
{
var si = context.SemanticModel.GetSymbolInfo(ident);
var local = si.Symbol as ILocalSymbol;
if (local != null)
{
var nts = local.Type as INamedTypeSymbol;
if (nts != null && nts.TypeArguments.Length == 1)
{
var typeArg = nts.TypeArguments[0];
clsInfo = efContext.GetClassInfo(typeArg);
if (clsInfo != null)
{
return(LinqExpressionValidator.SymbolCanBeTracedBackToDbContext(local, context, efContext, clsInfo));
}
}
}
}
return(false);
}
public static Dictionary <string, ContextualLinqParameter> BuildContext(QueryExpressionSyntax query, SyntaxNodeAnalysisContext context, EFUsageContext efContext)
{
var cparams = new Dictionary <string, ContextualLinqParameter>();
//From x
var fromExpr = query.FromClause.Identifier;
//in <expr>
var inExpr = query.FromClause.Expression;
string name = fromExpr.ValueText;
var memberExpr = inExpr as MemberAccessExpressionSyntax;
if (memberExpr != null)
{
EFCodeFirstClassInfo cls;
if (LinqExpressionValidator.MemberAccessIsAccessingDbContext(memberExpr, context, efContext, out cls))
{
cparams[name] = new ContextualLinqParameter(name, cls);
}
}
//Still not set, just set as a contextual parameter with no known type
if (!cparams.ContainsKey(name))
{
cparams[name] = new ContextualLinqParameter(name);
}
return(cparams);
}