#format java

/**
 * CompositePattern example
 */

import java.util.Iterator;
import java.util.Vector;

abstract class Entry {
    public abstract String getName();
    public abstract int getSize();
    public Entry add(Entry entry) throws FileTreatmentException {
        throw new FileTreatmentException();
    }
    public void printList() {
        printList("");
    }
    protected abstract void printList(String prefix);
    public String toString() {
        return getName()+" ("+getSize()+")";
    }
}

class File extends Entry {
    private String name;
    private int size;
    public File(String name, int size) {
        this.name = name;
        this.size = size;
    }
    public String getName() {
        return name;
    }
    public int getSize() {
        return size;
    }
    protected void printList(String prefix) {
        System.out.println(prefix+"/"+this);
    }
}

class Directory extends Entry {
    private String name;
    private Vector directory = new Vector();
    public Directory(String name) {
        this.name = name;
    }
    public String getName() {
        return name;
    }
    public int getSize() {
        int size = 0;
        Iterator it = directory.iterator();
        while(it.hasNext()) {
            Entry entry = (Entry)it.next();
            size+=entry.getSize();
        }
        return size;
    }
    public Entry add(Entry entry) {
        directory.add(entry);
        return this;
    }
    protected void printList(String prefix) {
        System.out.println(prefix+"/"+this);
        Iterator it = directory.iterator();
        while(it.hasNext()) {
            Entry entry = (Entry)it.next();
            entry.printList(prefix+"/"+name);
        }
    }
}

class FileTreatmentException extends RuntimeException {
    public FileTreatmentException() {
    }
    public FileTreatmentException(String msg) {
        super(msg);
    }
}

public class CompositeDirectory {
    public static void main(String[] args) {
        try {
            System.out.println("Making root entries...");
            Directory root = new Directory("root");
            Directory bin = new Directory("bin");
            Directory usr = new Directory("usr");
            root.add(bin);
            root.add(usr);
            bin.add(new File("vi", 10000));
            bin.add(new File("latex", 20000));
            root.printList();
        } catch(FileTreatmentException e) {
            e.printStackTrace();
        }
    }
}