public static MethodInfo GetKeySourceMethodInfo(this Type rootType, AssetDictionaryAttribute attribute)
{
if (attribute.UseAssetFileNameAsKey)
{
return(GetFileNameAsKey(rootType));
}
var methodInfo = GetPropertyKeySourceMethodInfo(rootType, attribute, allowGeneral: false);
if (methodInfo != null)
{
return(methodInfo);
}
methodInfo = GetCustomKeySourceMethodInfo(rootType, attribute, allowGeneral: false);
if (methodInfo != null)
{
return(methodInfo);
}
methodInfo = GetPropertyKeySourceMethodInfo(rootType, attribute, allowGeneral: true);
if (methodInfo != null)
{
return(methodInfo);
}
methodInfo = GetCustomKeySourceMethodInfo(rootType, attribute, allowGeneral: true);
if (methodInfo != null)
{
return(methodInfo);
}
return(default(MethodInfo));
}
private static MethodInfo GetPropertyKeySourceMethodInfo(Type rootType, AssetDictionaryAttribute attribute, bool allowGeneral)
{
foreach (var propertyInfo in rootType.GetProperties())
{
var propertyAttributes = propertyInfo.Get <DictionaryKeyAttribute>().ToArray();
if (propertyAttributes.Length == 0)
{
continue;
}
foreach (var propertyAttribute in propertyAttributes)
{
if (!propertyInfo.CanRead)
{
Debug.LogError($"Property {propertyInfo.Name} is not readable and have {nameof(DictionaryKeyAttribute)}. It will be ignored.");
continue;
}
if (allowGeneral && string.IsNullOrEmpty(propertyAttribute.GroupName))
{
return(propertyInfo.GetGetMethod());
}
if (propertyAttribute.GroupName == attribute.Group)
{
return(propertyInfo.GetGetMethod());
}
}
}
return(null);
}
private static MethodInfo GetCustomKeySourceMethodInfo(Type rootType, AssetDictionaryAttribute attribute, bool allowGeneral)
{
var keySourceType = attribute.KeySourceType ?? rootType;
foreach (var methodInfo in keySourceType.GetMethods(BindingFlags.Static | BindingFlags.Public))
{
foreach (var methodAttribute in methodInfo.Get <DictionaryKeySourceAttribute>())
{
if (methodAttribute == null)
{
continue;
}
if (!allowGeneral && methodAttribute.Group != attribute.Group)
{
continue;
}
var parameters = methodInfo.GetParameters();
if (parameters.Length < 1 &&
parameters.Length > 2)
{
continue;
}
if (parameters.Length == 1 &&
parameters[0].ParameterType != rootType)
{
Debug.LogError($"Method {methodInfo.Name} is not valid for selecting keys! Type {rootType.Name} is not assignable from param type {parameters[0].ParameterType.Name}.");
continue;
}
var isValid = true;
foreach (var parameterInfo in parameters)
{
if (parameterInfo.ParameterType != rootType &&
parameterInfo.ParameterType != typeof(TextAsset))
{
Debug.LogError($"Method {methodInfo.Name} is not valid for selecting keys! Method have invalid param type {parameterInfo.ParameterType}");
isValid = false;
}
}
if (!isValid)
{
continue;
}
return(methodInfo);
}
}
return(null);
}