1  import java.io.*;

  2  

  3  public class DirectoryNode implements FileSystemNode

  4  {

  5     public DirectoryNode(File directory)

  6     {

  7        this.directory = directory;

  8     }

  9  

 10     public void accept(FileSystemVisitor v)

 11     {

 12        v.visitDirectoryNode(this);

 13     }

 14  

 15     public File getDirectory() { return directory; }

 16  

 17     public FileSystemNode[] getChildren()

 18     {

 19        File[] files = directory.listFiles();

 20        FileSystemNode[] children = new FileSystemNode[files.length];

 21        for (int i = 0; i < files.length; i++)

 22        {

 23           File f = files[i];

 24           if (f.isDirectory())

 25              children[i] = new DirectoryNode(f);

 26           else

 27              children[i] = new FileNode(f);

 28        }

 29        return children;

 30     }

 31  

 32     private File directory;

 33  }