private KeyValuePair <Type, Func <DbContext> > FindContextType(string name)
{
var types = FindContextTypes();
if (string.IsNullOrEmpty(name))
{
if (types.Count == 0)
{
throw new OperationException(DesignCoreStrings.NoContext(_assembly.GetName().Name));
}
if (types.Count == 1)
{
return(types.First());
}
throw new OperationException(DesignCoreStrings.MultipleContexts);
}
var candidates = FilterTypes(types, name, ignoreCase: true);
if (candidates.Count == 0)
{
throw new OperationException(DesignCoreStrings.NoContextWithName(name));
}
if (candidates.Count == 1)
{
return(candidates.First());
}
// Disambiguate using case
candidates = FilterTypes(candidates, name);
if (candidates.Count == 0)
{
throw new OperationException(DesignCoreStrings.MultipleContextsWithName(name));
}
if (candidates.Count == 1)
{
return(candidates.First());
}
// Allow selecting types in the default namespace
candidates = candidates.Where(t => t.Key.Namespace == null).ToDictionary(t => t.Key, t => t.Value);
if (candidates.Count == 0)
{
throw new OperationException(DesignCoreStrings.MultipleContextsWithQualifiedName(name));
}
Debug.Assert(candidates.Count == 1, "candidates.Count is not 1.");
return(candidates.First());
}