From: "Paatsch, Bernd" <BPaatsch@...>
Date: 2006-02-07T08:30:54+09:00
Subject: Creating classes only when needed?

------_=_NextPart_001_01C62B75.53C5DB3A
Content-Type: text/plain

Hello,

I am fairly new to ruby and need some help 
I am structuring my code using classes. 
The application I work on requires input data. This data may require all or
some of the classes I create. Instead of having a section in the main code
creating all classes I would like to create only those classes that I need
while reading the data. However I do not know how to do that. Below is the
outline of my code.

Any suggestions

 class ReadFileFactory
# handles calling the right class to for reading the data
# from database, from CSV-file, etc.
 ... code goes here .....
 end

  class CSVReadFile( externalClass, nameID ) 
# handles reading data using a csv-file and assigning it to the appropriate
Hash
 ... code goes here .....
    case signal
    when  nameID
      externalClass.getLine(tempStore)
   when ....
  end

  class AddSubscriber
# handles adding a subscriber 
 ... code goes here .....
  end


# main program

# Initialize I don't like that
 class1 = Class1.new;
 class2 = Class2.new; #etc
 test =  ReadFileFactory.start_csv_readfile("sample.csv") 

test.processingFile( class1 )

# I rather would have something like that
ReadFileFactory.start_csv_readfile("sample.csv") will return only the
classes I need.


------_=_NextPart_001_01C62B75.53C5DB3A--