CODEWITHSUNDEEP
c#design-patternsgenerics
Anish
Anish

Reputation: 912

How to use generic interface in an Factory

I have a factory which has some concrete sub classes for generating reports (.txt, .csv,.xls) I want to make the interface of the concrete classes to be generic so that i can pass in diff types of parameters (Instead of DataTable i need to use DataSet or some other class instance as argument). Here is my interface.

interface IReportCreator
{
    bool Create(DataTable dt);
}

I made the interface as generic..like the one below

interface IReportCreator<T>
{
    bool Create(T args);
}

Now my question is how can i return the generic interface from the Factory My previous factory code

class Factory
{
    static IReportCreator  GetReportCreator(string type)
    {
        IReportCreator reportCreator = null;
        if(type == "txt")
            reportCreator = new TextCreator(); 

        if(type == "csv")
            reportCreator = new CSVCreator();
    } 
}

And in the cient.. i call like this IReportCreator repCreator = Factory.GetReportCreator("txt"); repCreator.Create(// the arg); // Here the argument i need to make it as generic class Factory { // i dont know how to return the interface here.. }

Any help will be appreciated greatly..

Upvotes: 3

Views: 390

Answers (1)

Andreas Sabroe Jydebjerg
Andreas Sabroe Jydebjerg

Reputation: 266

interface IReportCreator<T>
{
  bool Create(T t);
}

class Factory
{
   public IReportCreator<T> Create<T>();
}

var factory = new Factory();
var reportCreator = factory.Create<DataTable>();

Upvotes: 3

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