/// <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);
}
/// <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 GetBuiltInFunctionsInfo(Type type)
{
type.NullCheck("type");
return(BuiltInFunctionInfoCache.Instance.GetOrAddNewValue(type, (cache, key) =>
{
BuiltInFunctionInfoCollection info = BuildBuiltInFunctionsInfo(type);
cache.Add(key, info);
return info;
}));
}
/// <summary>
/// 执行静态函数
/// </summary>
/// <param name="funcName"></param>
/// <param name="type"></param>
/// <param name="arrParams"></param>
/// <param name="callerContext"></param>
/// <returns></returns>
public static object ExecuteFunction(string funcName, Type type, ParamObjectCollection arrParams, object callerContext)
{
type.NullCheck("type");
BuiltInFunctionInfoCollection funcsInfo = GetBuiltInFunctionsInfo(type);
object result = null;
if (funcsInfo.Contains(funcName))
{
result = funcsInfo[funcName].ExecuteFunction(null, arrParams, callerContext);
}
return(result);
}
/// <summary>
/// 执行函数
/// </summary>
/// <param name="funcName"></param>
/// <param name="target"></param>
/// <param name="arrParams"></param>
/// <param name="callerContext"></param>
/// <returns></returns>
public static object ExecuteFunction(string funcName, object target, ParamObjectCollection arrParams, object callerContext)
{
target.NullCheck("target");
BuiltInFunctionInfoCollection funcsInfo = GetBuiltInFunctionsInfo(target.GetType());
object result = null;
if (funcsInfo.Contains(funcName))
{
result = funcsInfo[funcName].ExecuteFunction(target, arrParams, callerContext);
}
return(result);
}
