private object ConvertImpl(object value, Type targetType, SwitchConvertDirection direction)
{
var valueType = value?.GetType() ?? typeof(object);
Default <TKey, TValue> defaultCase = null;
foreach (var option in Options)
{
if (option is Case <TKey, TValue> caseOption)
{
var caseKey = GetKey(caseOption, direction, valueType);
if (Equals(value, caseKey))
{
return(GetValue(caseOption, direction, targetType));
}
continue;
}
var defaultOption = option as Default <TKey, TValue>;
if (defaultOption != null && defaultCase != null)
{
throw new Exception("SwitchConverter can have only 1 default case");
}
defaultCase = defaultOption;
}
return(defaultCase != null?GetValue(defaultCase, direction, targetType) : FallBackCase.Value.XamlConvert(targetType));
}
private static object GetValue(SwitchOption <TKey, TValue> switchOption, SwitchConvertDirection direction, Type targetType)
{
return(direction == SwitchConvertDirection.Direct ? (object)switchOption.XamlConvertValue(targetType) : switchOption.XamlConvertKey(targetType));
}
