private static MethodInfo GetMethod(Type type, string methodName, Type[] genericTypes, MethodParameter[] prms, bool isGenericVersion)
{
ArgumentAssert.IsNotNull(type, "type");
ArgumentAssert.IsNotNull(methodName, "methodName");
genericTypes = genericTypes ?? Type.EmptyTypes;
prms = prms ?? MethodParameter.EmptyParameters;
MethodKey key = new MethodKey(type, methodName, genericTypes, prms, isGenericVersion);
return(_getMethod(key));
}
private static MethodInfo GetMethod(MethodKey key)
{
MethodInfo result = null;
//遍历整个继承树，根据参数数量和类型找到方法
const BindingFlags oneLevelFlags =
BindingFlags.DeclaredOnly |
BindingFlags.Instance |
BindingFlags.Public |
BindingFlags.NonPublic |
BindingFlags.IgnoreCase | BindingFlags.Static;
Type currentType = key.ObjectType;
do
{
MethodInfo[] infos = currentType.GetMethods(oneLevelFlags);
foreach (MethodInfo info in infos)
{
if (info.Name.Equals(key.MethodName, StringComparison.OrdinalIgnoreCase))
{
if (key.IsOnlyMathName ||
(ValidateGenericArguments(info, key.GenericTypes) &&
ValidateParameters(info, key.Parameters)))
{
result = info;
break;
}
}
}
if (result != null)
{
break;
}
currentType = currentType.BaseType;
} while (currentType != null);
if (result == null)
{
return(result);
}
if (key.IsGenericVersion)
{
return(result);
}
return(key.GenericTypes.Length == 0 ? result : result.MakeGenericMethod(key.GenericTypes));
}