Added a function to print out traversal nodes. Modified Algorithms to return boardnode instead board.

src/Assignments/A1/Driver.java

@@ -6,26 +6,23 @@ import Assignments.A1.models.Board;
 import Assignments.A1.models.BoardGenerator;
 import Assignments.A1.models.BoardNode;
 import Assignments.A1.solving_algorithms.BFS;
-import Assignments.A1.solving_algorithms.DFS;
-import Assignments.A1.solving_algorithms.UCS;
 
 import java.util.ArrayList;
 import java.util.Date;
-import java.util.Iterator;
-import java.util.concurrent.TimeUnit;
+import java.util.PriorityQueue;
 
 /**
  * Board will be used to save locations in a 2D array.
- *
+ * <p>
  * The design of the board locations will be numbered like so:
  * 0   1   2
  * 3   4   5
  * 6   7   8
- *
+ * <p>
  * 1   2   3
  * 8   0   4
  * 7   6   5
- *
+ * <p>
  * The values will be specified with an int. Must be between (inclusive) 1-8.
  * The empty spot will be represented with null.
  */
@@ -35,6 +32,7 @@ public class Driver {
         ArrayList<Long> timer = new ArrayList<>();
         int successes = 0;
         int runs = 1;
+        BoardNode node = null;
         for (int run = 0; run < runs; run++) {
             Board board = BoardGenerator.generateBoard();
 //            DFS solver = new DFS();
@@ -47,6 +45,7 @@ public class Driver {
                 long runtime = end.getTime() - start.getTime();
                 timer.add(runtime);
                 successes++;
+                node = result;
             }
         }
         long total = 0;
@@ -58,30 +57,59 @@ public class Driver {
         System.out.println("Average Runtime: " + average);
         System.out.println("Number of successful solves: " + successes + "/" + runs);
 
-        StringBuffer buffer = new StringBuffer();
+        String result = printTotalHierarchy(node);
+        System.out.println(result);
 
     }
 
 
-    private void print(StringBuilder buffer, BoardNode root) {
-        buffer.append(root.board.toString());
-        buffer.append("BFS");
-        buffer.append('\n');
-        for (Iterator<BoardNode> it = root.children.iterator(); it.hasNext();) {
-            BoardNode next = it.next();
-            if (it.hasNext()) {
-                buffer.append("├──").append(next.board.toString());
-            } else {
-                buffer.append(next.board.toString() + "\n└── ").append(next.board.toString() + "    ");
-            }
-        }
-    }
-
-
 //    public static void main(String[] args) {
 //        int[] values = {1, 2, 3, 8, 0, 5, 4, 7, 6};
 //        BoardNode node = new BoardNode(new Board(values), null);
 //        System.out.println(node.heuristic);
 //    }
 
+
+    private static String printTotalHierarchy(BoardNode root, int depth, boolean hasMoreChildren) {
+        String result = "";
+        for (int i = 0; i < depth - 1; i++) {
+            result += "│  ";
+        }
+        if (hasMoreChildren) {
+            result += "├── " + root.board.toString() + System.lineSeparator();
+        } else {
+            result += "└── " + root.board.toString() + System.lineSeparator();
+        }
+
+        for (int i = 0; i < root.children.size(); i++) {
+            if (i == root.children.size() - 1) {
+                result += printTotalHierarchy(root.children.get(i), depth+1, false);
+            } else {
+                result += printTotalHierarchy(root.children.get(i), depth+1, true);
+            }
+        }
+        return result;
+    }
+
+    public static String printTotalHierarchy(BoardNode solved) {
+        BoardNode root = null;
+        while (solved.parent != null) {
+            solved = solved.parent;
+        }
+        root = solved;
+
+        String result = root.board.toString() + System.lineSeparator();
+        if (root.children.size() == 1) {
+            result += printTotalHierarchy(root.children.get(0), 1, false);
+        } else {
+            for (int i = 0; i < root.children.size(); i++) {
+                if (i == root.children.size() - 1) {
+                    result += printTotalHierarchy(root.children.get(i), 1, false);
+                } else {
+                    result += printTotalHierarchy(root.children.get(i), 1, true);
+                }
+            }
+        }
+        return result;
+    }
 }

src/Assignments/A1/solving_algorithms/AStar.java

@@ -13,7 +13,7 @@ public class AStar {
     private final Board solved = new Board();
     private final HashSet<Board> visited = new HashSet<>();
 
-    public Board traverse(Board root) {
+    public BoardNode traverse(Board root) {
         PriorityQueue<BoardNode> boards = new PriorityQueue<>(new UCSPriority());
         boards.add(new BoardNode(root, null));
         BoardNode node = null;
@@ -32,7 +32,7 @@ public class AStar {
                 boards.add(new BoardNode(child, node));
             }
         }
-        return node.board;
+        return node;
     }
 }
 

src/Assignments/A1/solving_algorithms/UCS.java

@@ -13,9 +13,7 @@ public class UCS {
     private final Board solved = new Board();
     private final HashSet<Board> visited = new HashSet<>();
 
-    public BoardNode test = null;
-
-    public Board traverse(Board root) {
+    public BoardNode traverse(Board root) {
         PriorityQueue<BoardNode> boards = new PriorityQueue<>(new UCSPriority());
         boards.add(new BoardNode(root, null));
         BoardNode node = null;
@@ -34,8 +32,7 @@ public class UCS {
                 boards.add(new BoardNode(child, node));
             }
         }
-        test = node;
-        return node.board;
+        return node;
     }
 }