public void Run()
{
Console.WriteLine(
"\n====================================================================================\n");
UseAccentColor();
Console.WriteLine("\t\tAdapter");
UsePrimaryColor();
Console.WriteLine("\tAllows objects with incompatible interfaces to collaborate\n");
UseAccentColor();
Console.WriteLine("\tWhen to use?");
UsePrimaryColor();
Console.WriteLine("\tUse the Adapter class when you want to use some existing\r\n\tclass, but its interface isn’t compatible with the rest of your code.\r");
Console.WriteLine("\tUse the pattern when you want to reuse several existing subclasses that lack some \r\n\tcommon functionality that can’t be added to the superclass\r");
UseAccentColor();
Console.WriteLine("\n\tHow to implement?");
UsePrimaryColor();
Console.WriteLine("\t1. Make sure there are two classes: Usefull service class which you can`t change\n\t and one or more client classes that would benefit using this service\n");
Console.WriteLine("\t2. Declare the client interface and describe how clients communicate with the service\n");
Console.WriteLine("\t3. Create the adapter class and make it follow the client interface. Leave other methods empty for now\n");
Console.WriteLine("\t4. Add fields to adapter class to store a reference to the service object.\n\tThe common practice is to initialize this field via constructor, but\n\t you can also pass it to the adapter when calling methods\n");
Console.WriteLine("\t5. Implement all methods of the client interface in adapter class. Adapter should delegate most of the real work\n\tto the service object, handling only data format conversion\n");
Console.WriteLine("\t6. Clients should use the adapter via the client interface. This will let you change or extend the adapter\n\twithout affecting the client code\n");
var hole = new RoundHole(5);
var rpeg = new RoundPeg(5);
Console.WriteLine($"\thole(5) fits rpeg compatible(5) = {hole.Fits(rpeg)}");
var smallSqpeg = new SquarePeg(5);
var largeSqpeg = new SquarePeg(10);
//hole.Fits(smallSqpeg); Incompatible
var smallSqpegAdapter = new SquarePegAdapter(smallSqpeg);
var largeSqpegAdapter = new SquarePegAdapter(largeSqpeg);
Console.WriteLine($"\thole(5) fits smallSqpegAdapter(5) = {hole.Fits(smallSqpegAdapter)}");
Console.WriteLine($"\thole(5) fits largeSqpegAdapter(10) = {hole.Fits(largeSqpegAdapter)}");
Console.WriteLine(
"\n====================================================================================\n");
}
public SquarePegAdapter(SquarePeg peg) : base(peg.Width * (float)Math.Sqrt(2) / 2)
{
_peg = peg;
}