private static SCPropertyAccessorBase GetPropertyAccessor(string funcName, SCConditionCalculatingContext context)
{
SCPropertyAccessorBase result = null;
SchemaNameAndPropertyName snpn = SchemaNameAndPropertyName.FromFullName(funcName);
snpn.CheckIsValid();
if (context.PropertyAccessors.TryGetValue(snpn, out result) == false)
{
result = new DefaultUsersPropertyAccessor(snpn);
context.PropertyAccessors.Add(snpn, result);
}
return(result);
}
private static object CalculateUserFunction(string funcName, ParamObjectCollection arrParams, object callerContext)
{
SCConditionCalculatingContext context = (SCConditionCalculatingContext)callerContext;
object result = null;
if (SCBuiltInFunctionsCalculator.Instance.IsFunction(funcName))
{
//如果是内置函数，则返回内置函数的结果
result = SCBuiltInFunctionsCalculator.Instance.Calculate(funcName, arrParams, context);
}
else
{
//根据函数名称，获取属性访问器
SCPropertyAccessorBase accessor = GetPropertyAccessor(funcName, context);
result = accessor.GetValue(context, arrParams);
}
return(result);
}
