private static void Main(string[] args)
{
Console.WriteLine("======= Demonstration of Composite =======");
// make the root of my hard disk
IComponent root = new Folder("Root");
// create some folder in a hierarchy
// root
// --- a
// --- b
// --- c
IComponent folderA = new Folder("FolderA");
root.AddComponent(folderA);
IComponent folderB = new Folder("FolderB");
folderA.AddComponent(folderB);
IComponent folderC = new Folder("FolderC");
root.AddComponent(folderC);
// add some 'files' to the a folder
IComponent fileX = new File("FileX", 1000);
IComponent fileY = new File("FileY",3000);
IComponent fileZ = new File("FileZ",5000);
folderA.AddComponent(fileX);
folderA.AddComponent(fileY);
folderA.AddComponent(fileZ);
// add some 'files' to the b folder
IComponent file1 = new File("File1",30);
IComponent file2 = new File("File2",20);
IComponent file3 = new File("File3",10);
folderB.AddComponent(file1);
folderB.AddComponent(file2);
folderB.AddComponent(file3);
// leaf operation
Console.WriteLine("File 1 has size " + file1.Size() +
" (Correct: 30)");
// composite operation
Console.WriteLine("Folder b has size " + folderB.Size() +
" (Correct: 60)");
Console.WriteLine("Folder root has size " + root.Size() +
" (Correct: 9060)");
Console.WriteLine("Printing the root folder/file structure:");
root.Print(0);
Console.WriteLine("Deleting root...");
root.Delete();
Console.WriteLine("Folder root has size " + root.Size() +
" (Correct: 0)");
Console.ReadKey();
}