import java.awt.Graphics;
public class Path {

private final int MAXSIZE = 10000;
private Increment[] path;
private int index;
private Increment start;

public Path(Increment _start) {
   path = new Increment[MAXSIZE];
   path[0] = _start;
   index = 1;
}


/*
   appends a new element to the path
*/
public void append(Increment inc) {
   if(index < MAXSIZE-1) {
      path[index++] = inc;
   }
}

public Path copy() {
   Path temp = new Path(start);
   for(int i=1; i<index; i++) {
      temp.append(path[i]);
   }
   return temp;
}



/* 
   returns the last element of path
*/      
public Increment last() {
   return path[index-1];
}


/*
   draws the whole path
*/
public void draw(Graphics g) {
   for(int i=0; i<index; i++) {
      path[i].draw(g);
   }
}  


/*
   reset index and make new path
*/
public void reset() { 
   index = 1;
}

public void clear() {
   path[0] = path[index-1];
   index = 1;
}

/*
   predicate for empty
*/
public boolean empty() {
   return index == 1;
}

      
}