public bool IsFunction(string funcName)
{
funcName.CheckStringIsNullOrEmpty("funcName");
BuiltInFunctionInfoCollection funcsInfo = BuiltInFunctionHelper.GetBuiltInFunctionsInfo(this.GetType());
return(funcsInfo.Contains(funcName));
}
public void EnumBuiltInFunctionInfoTest()
{
BuiltInFunctionInfoCollection funcsInfo = BuiltInFunctionHelper.GetBuiltInFunctionsInfo(typeof(BuiltInFuncWrapper));
funcsInfo.ForEach(f => Console.WriteLine(f.FunctionName));
Assert.IsTrue(funcsInfo.Contains("add"));
Assert.IsTrue(funcsInfo.Contains("sub"));
}
/// <summary>
/// 从类型上获取内置表达式函数集合
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
public static BuiltInFunctionInfoCollection BuildBuiltInFunctionsInfo(Type type)
{
type.NullCheck("type");
MethodInfo[] methods = type.GetMethods(BindingFlags.Instance | BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.Public);
BuiltInFunctionInfoCollection result = new BuiltInFunctionInfoCollection();
foreach (MethodInfo method in methods)
{
BuiltInFunctionAttribute attr = AttributeHelper.GetCustomAttribute<BuiltInFunctionAttribute>(method);
if (attr != null)
{
if (attr.FunctionName.IsNullOrEmpty())
attr.FunctionName = method.Name;
if (result.Contains(attr.FunctionName) == false)
result.Add(new BuiltInFunctionInfo(attr, method));
}
}
return result;
}
