private Type FindContextType(string name)
{
var types = GetContextTypes();
Type[] candidates;
if (string.IsNullOrEmpty(name))
{
candidates = types.Take(2).ToArray();
if (candidates.Length == 0)
{
throw new OperationException(CommandsStrings.NoContext);
}
if (candidates.Length == 1)
{
return(candidates[0]);
}
throw new OperationException(CommandsStrings.MultipleContexts);
}
candidates = FilterTypes(types, name, ignoreCase: true).ToArray();
if (candidates.Length == 0)
{
throw new OperationException(CommandsStrings.NoContextWithName(name));
}
if (candidates.Length == 1)
{
return(candidates[0]);
}
// Disambiguate using case
candidates = FilterTypes(candidates, name).ToArray();
if (candidates.Length == 0)
{
throw new OperationException(CommandsStrings.MultipleContextsWithName(name));
}
if (candidates.Length == 1)
{
return(candidates[0]);
}
// Allow selecting types in the default namespace
candidates = candidates.Where(t => t.Namespace == null).ToArray();
if (candidates.Length == 0)
{
throw new OperationException(CommandsStrings.MultipleContextsWithQualifiedName(name));
}
Debug.Assert(candidates.Length == 1, "candidates.Length is not 1.");
return(candidates[0]);
}
private KeyValuePair <Type, Func <DbContext> > FindContextType(string name)
{
var types = FindContextTypes();
if (string.IsNullOrEmpty(name))
{
if (types.Count == 0)
{
throw new OperationException(CommandsStrings.NoContext);
}
if (types.Count == 1)
{
return(types.First());
}
throw new OperationException(CommandsStrings.MultipleContexts);
}
var candidates = FilterTypes(types, name, ignoreCase: true);
if (candidates.Count == 0)
{
throw new OperationException(CommandsStrings.NoContextWithName(name));
}
if (candidates.Count == 1)
{
return(candidates.First());
}
// Disambiguate using case
candidates = FilterTypes(candidates, name);
if (candidates.Count == 0)
{
throw new OperationException(CommandsStrings.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(CommandsStrings.MultipleContextsWithQualifiedName(name));
}
Debug.Assert(candidates.Count == 1, "candidates.Count is not 1.");
return(candidates.First());
}