public static IEnumerable <XamlMember> GetSortedConstructorArguments(this XamlType type, IList <object> contents = null)
{
var constructors = type.UnderlyingType.GetTypeInfo().GetConstructors();
if (contents != null && contents.Count > 0)
{
var context = type.SchemaContext;
// find constructor that matches content type directly first, then by ones that can be converted by type
var constructorArguments =
FindConstructorArguments(context, constructors, contents, (type1, type2) => type1.UnderlyingType.GetTypeInfo().IsAssignableFrom(type2.UnderlyingType.GetTypeInfo()))
?? FindConstructorArguments(context, constructors, contents, (type1, type2) => type1.CanConvertFrom(type2));
if (constructorArguments != null)
{
return(constructorArguments);
}
}
// find constructor based on ConstructorArgumentAttribute
var args = type.GetConstructorArguments();
foreach (var ci in constructors)
{
var pis = ci.GetParameters();
if (args.Count != pis.Length)
{
continue;
}
bool mismatch = false;
foreach (var pi in pis)
{
mismatch |= args.All(a => a.ConstructorArgumentName() != pi.Name);
}
if (mismatch)
{
continue;
}
return(args.OrderBy(c => pis.FindParameterWithName(c.ConstructorArgumentName()).Position));
}
return(null);
}
public static IEnumerable <XamlMember> GetSortedConstructorArguments(this XamlType type, IList <object> contents = null)
{
var constructors = type.UnderlyingType.GetTypeInfo().GetConstructors();
if (contents != null && contents.Count > 0)
{
// find constructor based on supplied parameters
foreach (var constructor in constructors)
{
var parameters = constructor.GetParameters();
if (contents.Count > parameters.Length)
{
continue;
}
bool mismatch = false;
for (int i = 0; i < parameters.Length; i++)
{
var parameter = parameters[i];
if (i >= contents.Count)
{
// allow parameters with a default value to be omitted
mismatch = !parameter.HasDefaultValue();
if (mismatch)
{
break;
}
continue;
}
// check if the parameter value can be assigned to the required type
var posParameter = contents[i];
var paramXamlType = type.SchemaContext.GetXamlType(parameter.ParameterType);
// check if type input type can be converted to the parameter type
var inputType = posParameter == null ? XamlLanguage.Null : type.SchemaContext.GetXamlType(posParameter.GetType());
mismatch = !paramXamlType.CanConvertFrom(inputType);
if (mismatch)
{
break;
}
}
if (mismatch)
{
continue;
}
// matches constructor arguments
return(constructor
.GetParameters()
.Select(p => type.SchemaContext.GetParameter(p)));
}
}
// find constructor based on ConstructorArgumentAttribute
var args = type.GetConstructorArguments();
foreach (var ci in constructors)
{
var pis = ci.GetParameters();
if (args.Count != pis.Length)
{
continue;
}
bool mismatch = false;
foreach (var pi in pis)
{
for (int i = 0; i < args.Count; i++)
{
mismatch |= args.All(a => a.ConstructorArgumentName() != pi.Name);
}
}
if (mismatch)
{
continue;
}
return(args.OrderBy(c => pis.FindParameterWithName(c.ConstructorArgumentName()).Position));
}
return(null);
}
