Question

My Problem

I have a Problem which i can not solve my self. I dont want to use so much code, because i have multiple Classes which extend another class (in my case its called “Data”).

I have a log file, where each Data Group is beginning with a specific Group Name, for example “MitarbeiterSet”. The abstract Data-Class is used to prefent to much code, where I implemented variables like “String[] data” (for the data beeing parsed from the log file e.g. < 101 4 3 6 3 30 80 2 0 0 1 300 >) or “static String parseInduction”, which is used to determin, if this Class is the right one to create Objects from.

I have another Class, called ParseMonitor, which creates the StreamReader to parse the log-file. So if the right Class is found, i induct the setDataArray(StreamReader sr) function from the right Class, to parse the Data Array. (At this point i have to tell you, that i need those different Classes, because i need to upload them to a sql server specificly.)

This static function creates an object of it self and uses the parseLine(String line) Function to fill the object with data from the given line.

WHAT I NEED.

I want to call the static function of any class, just by having the name of this class. So i dont have to use that much code and be able to add more classes.

Later on i want to call every class and use the uploadToServer() to Upload it to the server.

Is this possible?

Answer 1

Since your static method is creating an instance of its class anyway, I suggest a different approach:

Create an interface that all classes that contain ParseLine can implement. (Change out the return type for the correct one):

public interface IParseLine
{
    string ParseLine(string line);
}

Have all of the classes that contain ParseLine() implement IParseLine.

Create an instance of the class, cast it to an IParseLine, and execute the method:

IParseLine pl = Activator.CreateInstance(Type.GetType(className)) as IParseLine;
if (pl != null)
{
    string parsedString = pl.ParseLine(line);
    // ...
}

Edit From comments:

I want to create a while loop, which can be stated as followed:
while{!sr.EndofStream){ line = sr.ReadLine(); for(int i = 0; i <
classNames.length; i++){ if(line.Contains(classNames[i].MYINDICATOR){
CALL classNames[i] STATIC METHOD TO PARSE THE FOLLOWING LINES AND
CREATE DATA Objects of its Class } }

I didn’t test this, but you can change the code to something like this (caching the reflection required to get MYINDICATOR):

IList<KeyValuePair<string, Type>> typeIndicators = classNames.Select(x => {
    Type t = Type.GetType(x);
    string indicator = (string)t.GetField("MYINDICATOR", BindingFlags.Public | BindingFlags.Static).GetValue(null);
    return new KeyValuePair(indicator, t);
});

while (!sr.EndOfStream)
{
    line = sr.ReadLine();
    foreach (var types in typeIndicators)
    {
        if (line.Contains(types.Key))
        {
             IParseLine pl = Activator.CreateInstance(types.Value) as IParseLine;
             if (pl != null)
             {
                 string parsedString = pl.ParseLine(line);
             }
        }
    }
}