public static string InvokeAnalyseMood(string methodName, string message)
{
try
{
MoodAnalyser moodAnalyzer = (MoodAnalyser)MoodAnalyserReflection.CreateMoodAnalyzerObject("MoodAnalyzerProblem.MoodAnalyzer", "MoodAnalyzer", message);
var type = typeof(MoodAnalyser);
//GetMethod Returns an object that represents the public method with the specified name, if found; otherwise, null.
var analyseMoodMethod = type.GetMethod(methodName);
// Now invoke method using meta information of method, need an instance of class and parameters as arguments
var mood = analyseMoodMethod.Invoke(moodAnalyzer, null);
return(mood.ToString());
}
catch (NullReferenceException)
{
// Get methods returns null incase no method is found with given methodName
// Invoke method will throw exception
throw new CustomMoodAnalyserException(CustomMoodAnalyserException.ExceptionType.NO_SUCH_METHOD, "No such method found");
}
catch (TargetInvocationException ex)
{
// When message is null or empty this exception is thrown
throw ex.InnerException;
}
}
static void Main(string[] args)
{
Console.WriteLine("MOOD ANALYSER PROGRAM");
string message = "i am very sad";
MoodAnalyser moodAnalyser = new MoodAnalyser(message);
Console.WriteLine("MOOD : {0}", moodAnalyser.AnalyseMood());
}
public static object SetField(MoodAnalyser moodAnalyzer, string fieldName, string newMessage)
{
try
{
// Meta information of MoodAnalyzer
var moodAnalyzerType = typeof(MoodAnalyser);
// Meta information of messageField
//GetField Returns an object that represents the field with the specified name, if found; otherwise, null.
var messageField = moodAnalyzerType.GetField(fieldName, BindingFlags.NonPublic | BindingFlags.Instance);
messageField.SetValue(moodAnalyzer, newMessage);
return(moodAnalyzer);
}
catch (NullReferenceException)
{
// GetField returns null incase no field is found with given fieldName
// SetValue method will throw exception
throw new CustomMoodAnalyserException(CustomMoodAnalyserException.ExceptionType.NO_SUCH_METHOD, "No such method found");
}
}
