Add files for exercise 5

app/src/main/java/ch/nuth/zhaw/exbox/MyVisitor.java

@@ -0,0 +1,20 @@
+package ch.nuth.zhaw.exbox;
+
+/**
+ * MyVisitor -- Diese Klasse wird für die Tests verwendet
+ */
+class MyVisitor<T> implements Visitor<T> {
+    StringBuilder output;
+
+    MyVisitor() {
+        output = new StringBuilder();
+    }
+
+    public void visit(T s) {
+        output.append(s);
+    }
+
+    public String toString() {
+        return output.toString();
+    }
+}

app/src/main/java/ch/nuth/zhaw/exbox/RankingTreeServer.java

@@ -0,0 +1,38 @@
+package ch.nuth.zhaw.exbox;
+
+import java.util.concurrent.atomic.AtomicInteger;
+
+public class RankingTreeServer implements CommandExecutor {
+
+    public Tree<Competitor> createTree(String rankingText) {
+        // TODO Implement
+        return null;
+    }
+
+    public String createSortedText(Tree<Competitor> competitorTree) {
+        AtomicInteger rank = new AtomicInteger(1);
+        StringBuilder sb = new StringBuilder();
+        competitorTree.traversal(); // TODO Implement
+        return sb.toString();
+    }
+
+    public String execute(String rankingList) {
+        Tree<Competitor> competitorTree = createTree(rankingList);
+        return "Rangliste (Tree)\n" + createSortedText(competitorTree);
+    }
+
+    public static void main(String[] args) {
+        String rangliste = "Mueller Stefan;02:31:14\n" +
+                "Marti Adrian;02:30:09\n" +
+                "Kiptum Daniel;02:11:31\n" +
+                "Ancay Tarcis;02:20:02\n" +
+                "Kreibuhl Christian;02:21:47\n" +
+                "Ott Michael;02:33:48\n" +
+                "Menzi Christoph;02:27:26\n" +
+                "Oliver Ruben;02:32:12\n" +
+                "Elmer Beat;02:33:53\n" +
+                "Kuehni Martin;02:33:36\n";
+        RankingTreeServer server = new RankingTreeServer();
+        System.out.println(server.execute(rangliste));
+    }
+}

app/src/main/java/ch/nuth/zhaw/exbox/SortedBinaryTree.java

@@ -0,0 +1,128 @@
+package ch.nuth.zhaw.exbox;
+
+public class SortedBinaryTree<T extends Comparable<T>> implements Tree<T> {
+    protected TreeNode<T> root;
+
+    private TreeNode<T> insertAt(TreeNode<T> node, T x) {
+        if (node == null) {
+            return new TreeNode<T>(x);
+        } else {
+            if (x.compareTo(node.getValue()) <= 0) {
+                node.left = insertAt(node.left, x);
+            } else {
+                node.right = insertAt(node.right, x);
+            }
+            return node;
+        }
+    }
+
+    public void add(T x) {
+        root = insertAt(root, x);
+    }
+
+    // find node to replace
+    private TreeNode<T> findRepAt(TreeNode<T> node, TreeNode<T> rep) {
+        if (node.right != null) {
+            node.right = findRepAt(node.right, rep);
+        } else {
+            rep.values = node.values;
+            node = node.left;
+        }
+        return node;
+    }
+
+    // remove node
+    private TreeNode<T> removeAt(TreeNode<T> node, T x, TreeNode<T> removed) {
+        if (node == null) {
+            return null;
+        } else {
+            if (x.compareTo(node.getValue()) == 0) {
+                // found
+                removed.values = node.values;
+                if (node.left == null) {
+                    node = node.right;
+                } else if (node.right == null) {
+                    node = node.left;
+                } else {
+                    node.left = findRepAt(node.left, node);
+                }
+            } else if (x.compareTo(node.getValue()) < 0) {
+                // search left
+                node.left = removeAt(node.left, x, removed);
+            } else {
+                // search right
+                node.right = removeAt(node.right, x, removed);
+            }
+            return node;
+        }
+    }
+
+    public T remove(T x) {
+        TreeNode<T> removed = new TreeNode<T>(null);
+        root = removeAt(root, x, removed);
+        return removed.getValue();
+    }
+
+    public boolean isEmpty() {
+        return root == null;
+    }
+
+    public Traversal<T> traversal() {
+        // TODO Implement
+        return null;
+    }
+
+    protected int calcHeight(TreeNode<T> node) {
+        // TODO Implement
+        return 0;
+    }
+
+    public int height() {
+        return calcHeight(root);
+    }
+
+    protected int calcSize(TreeNode<T> p) {
+        // TODO Implement
+        return 0;
+    }
+
+    public int size() {
+        return calcSize(root);
+    }
+
+    public boolean balanced() {
+        return false;
+    }
+
+    // only for testing and debugging: show the structure of the tree
+    public String printTree() {
+        StringBuilder out = new StringBuilder();
+        if (root.right != null) {
+            printTree(root.right, out, true, "");
+        }
+        out.append(root.values).append("\n");
+        if (root.left != null) {
+            printTree(root.left, out, false, "");
+        }
+        return out.toString();
+    }
+
+    private void printTree(TreeNode<T> node, StringBuilder out, boolean isRight, String indent) {
+        if (node.right != null) {
+            printTree(node.right, out, true,
+                    indent + (isRight ? "        " : " |      "));
+        }
+        out.append(indent);
+        if (isRight) {
+            out.append(" /");
+        } else {
+            out.append(" \\");
+        }
+        out.append("----- ");
+        out.append(node.values).append("\n");
+        if (node.left != null) {
+            printTree(node.left, out, false,
+                    indent + (isRight ? " |      " : "        "));
+        }
+    }
+}

app/src/main/java/ch/nuth/zhaw/exbox/Traversal.java

@@ -0,0 +1,15 @@
+package ch.nuth.zhaw.exbox;
+
+/** interface of Traversal ADT */
+public interface Traversal<T> {
+    /** traverse elements of tree in preorder */
+    void preorder(Visitor<T> vistor);
+    /** traverse elements of tree in inorder */
+    void inorder(Visitor<T> vistor);
+    /** traverse elements of tree in postorder */
+    void postorder(Visitor<T> vistor);
+    /** traverse elements of tree in levelorder */
+    void levelorder(Visitor<T> vistor);
+    /** traverse elements of tree interval */
+    void interval(T min, T max, Visitor<T> vistor);
+}

app/src/main/java/ch/nuth/zhaw/exbox/Tree.java

@@ -0,0 +1,25 @@
+package ch.nuth.zhaw.exbox;
+
+/** interface of Tree ADT */
+public interface Tree<T extends Comparable<T>> {
+    /** add an element to the tree */
+    void add(T o);
+
+    /** remove an element; returns the element if found else return null */
+    T remove(T o);
+
+    /** test if tree is empty */
+    boolean isEmpty();
+
+    /** returns instance of class that implements traversal interface */
+    Traversal<T> traversal();
+
+    /** number of elements */
+    int size();
+
+    /** height of the tree */
+    int height();
+
+    /** is the tree balanced */
+    boolean balanced();
+}

app/src/main/java/ch/nuth/zhaw/exbox/TreeNode.java

@@ -0,0 +1,22 @@
+package ch.nuth.zhaw.exbox;
+
+import java.util.LinkedList;
+import java.util.List;
+
+class TreeNode<T extends Comparable<T>> {
+    List<T> values;  // implemented as list because of doublette handling in AVL
+    TreeNode<T> left, right;
+    int height; // for AVL
+
+    TreeNode(T value){
+        this.values = new LinkedList<>();
+        this.values.add(value);
+        this.height = 1;
+    }
+
+    TreeNode(T value, TreeNode<T> left, TreeNode<T> right){
+        this(value); this.left = left; this.right = right;
+    }
+
+    T getValue(){return values.get(0);}
+}

app/src/main/java/ch/nuth/zhaw/exbox/TreeTraversal.java

@@ -0,0 +1,33 @@
+package ch.nuth.zhaw.exbox;
+
+public class TreeTraversal<T extends Comparable<T>> implements Traversal<T> {
+    private final TreeNode<T> root;
+
+    public TreeTraversal(TreeNode<T> root) {
+        this.root = root;
+    }
+
+    public void inorder(Visitor<T> vis) {
+        // TODO Implement
+    }
+
+    public void preorder(Visitor<T> vis) {
+        // TODO Implement
+    }
+
+    public void postorder(Visitor<T> vis) {
+        // TODO Implement
+    }
+
+    @Override
+    public void levelorder(Visitor<T> vistor) {
+        // TODO Auto-generated method stub
+        
+    }
+
+    @Override
+    public void interval(T min, T max, Visitor<T> vistor) {
+        // TODO Auto-generated method stub
+        
+    }
+}

app/src/main/java/ch/nuth/zhaw/exbox/Visitor.java

@@ -0,0 +1,7 @@
+package ch.nuth.zhaw.exbox;
+
+/** interface of visitor ADT */
+public interface Visitor<T> {
+    /** called for each element in the tree */
+    void visit(T obj);
+}

app/src/test/java/ch/nuth/zhaw/exbox/ADS5_2_test.java

@@ -0,0 +1,84 @@
+package ch.nuth.zhaw.exbox;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+/**
+ * @(#)TreeTest.java
+ *
+ *
+ * @author K Rege
+ * @version 1.00 2018/3/17
+ * @version 1.01 2021/8/1
+ */
+public class ADS5_2_test {
+    Tree<String> tree;
+
+    @BeforeEach
+    public void setUp() {
+        tree = new SortedBinaryTree<>();
+        tree.add("B");
+        tree.add("A");
+        tree.add("C");
+        tree.add("D");
+    }
+
+    @Test
+    public void testInorder() {
+        Visitor<String> v = new MyVisitor<>();
+        tree.traversal().inorder(v);
+        assertEquals("ABCD", v.toString(), "inorder");
+    }
+
+    @Test
+    public void testPreorder() {
+        Visitor<String> v = new MyVisitor<>();
+        tree.traversal().preorder(v);
+        assertEquals("BACD", v.toString(), "preorder");
+    }
+
+    @Test
+    public void testPostorder() {
+        Visitor<String> v = new MyVisitor<>();
+        tree.traversal().postorder(v);
+        assertEquals("ADCB", v.toString(), "postorder");
+    }
+
+    @Test
+    public void testLevelorder() {
+        Visitor<String> v = new MyVisitor<>();
+        tree.traversal().levelorder(v);
+        assertEquals("BACD", v.toString(), "levelorder");
+    }
+
+    @Test
+    public void testMixed() {
+        Tree<String> tree = new SortedBinaryTree<>();
+        List<String> list = new LinkedList<>();
+        for (int i = 0; i < 1000; i++) {
+            char c = (char) ('A' + (Math.random() * 26));
+            int op = (int) (Math.random() * 2);
+            switch (op) {
+                case 0:
+                    list.add(Character.toString(c));
+                    tree.add(Character.toString(c));
+                    break;
+                case 1:
+                    list.remove(Character.toString(c));
+                    tree.remove(Character.toString(c));
+                    break;
+            }
+        }
+        Collections.sort(list);
+        String expected = String.join("", list);
+        Visitor<String> v = new MyVisitor<>();
+        tree.traversal().inorder(v);
+        assertEquals(expected, v.toString(), "mixed");
+    }
+}

app/src/test/java/ch/nuth/zhaw/exbox/ADS5_3_test.java

@@ -0,0 +1,61 @@
+package ch.nuth.zhaw.exbox;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.util.concurrent.atomic.AtomicInteger;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class ADS5_3_test {
+    Tree<Competitor> rankGood;
+    Tree<Competitor> rankTest;
+    String textGood;
+    String textTest;
+
+    public Tree<Competitor> createTree(String rankingText) {
+        Tree<Competitor> competitorTree = new SortedBinaryTree<>();
+        String[] lines = rankingText.split("\n");
+        for (String line : lines) {
+            String name = line.split(";")[0];
+            String time = line.split(";")[1];
+            competitorTree.add(new Competitor(0, name,  time));
+        }
+        return competitorTree;
+    }
+
+    public String createSortedText(Tree<Competitor> competitorTree) {
+        AtomicInteger rank = new AtomicInteger(1);
+        StringBuilder sb = new StringBuilder();
+        competitorTree.traversal().inorder(c -> {c.setRank(rank.getAndIncrement()); sb.append(c).append("\n");});
+        return sb.toString();
+    }
+
+    @BeforeEach
+    public void setUp() {
+        String rangliste = "Mueller Stefan;02:31:14\n" +
+                "Marti Adrian;02:30:09\n" +
+                "Kiptum Daniel;02:11:31\n" +
+                "Ancay Tarcis;02:20:02\n" +
+                "Kreibuhl Christian;02:21:47\n" +
+                "Ott Michael;02:33:48\n" +
+                "Menzi Christoph;02:27:26\n" +
+                "Oliver Ruben;02:32:12\n" +
+                "Elmer Beat;02:33:53\n" +
+                "Kuehni Martin;02:33:36\n";
+        rankGood = createTree(rangliste);
+        textGood = createSortedText(rankGood);
+        rankTest = new RankingTreeServer().createTree(rangliste);
+        textTest = new RankingTreeServer().createSortedText(rankTest);
+    }
+
+    @Test
+    public void testCreateText() {
+        String[] good = textGood.split("\n");
+        String[] test = textTest.split("\n");
+        assertEquals(good.length, test.length, "length");
+        for (int i = 0; i < good.length;i++) {
+            assertEquals(good[i], test[i], "rangliste["+i+"]");
+        }
+    }
+}

app/src/test/java/ch/nuth/zhaw/exbox/ADS5_4_test.java

@@ -0,0 +1,61 @@
+package ch.nuth.zhaw.exbox;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.util.LinkedList;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+/**
+ * @(#)TreeTest.java
+ *
+ *
+ * @author K Rege
+ * @version 1.00 2018/3/17
+ * @version 1.01 2021/8/1
+ */
+public class ADS5_4_test {
+    Tree<String> tree;
+
+    @BeforeEach
+    public void setUp() {
+        tree = new SortedBinaryTree<>();
+        tree.add("B");
+        tree.add("A");
+        tree.add("C");
+        tree.add("D");
+    }
+
+    @Test
+    public void testHeight() {
+        assertEquals(3, tree.height(), "height");
+    }
+
+    @Test
+    public void testSize() {
+        assertEquals(4, tree.size(), "size");
+    }
+
+    @Test
+    public void testSizeMixed() {
+        Tree<String> tree = new SortedBinaryTree<>();
+        List<String> list = new LinkedList<>();
+        for (int i = 0; i < 1000; i++) {
+            char c = (char) ('A' + (Math.random() * 26));
+            int op = (int) (Math.random() * 2);
+            switch (op) {
+                case 0:
+                    list.add(Character.toString(c));
+                    tree.add(Character.toString(c));
+                    break;
+                case 1:
+                    list.remove(Character.toString(c));
+                    tree.remove(Character.toString(c));
+                    break;
+            }
+        }
+        assertEquals(list.size(), tree.size());
+    }
+}

app/src/test/java/ch/nuth/zhaw/exbox/ADS5_5_test.java

@@ -0,0 +1,56 @@
+package ch.nuth.zhaw.exbox;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * @(#)TreeTest.java
+ *
+ *
+ * @author K Rege
+ * @version 1.00 2018/3/17
+ * @version 1.01 2021/8/1
+ */
+public class ADS5_5_test {
+    Tree<String> tree;
+
+    @BeforeEach
+    public void setUp() {
+        tree = new SortedBinaryTree<>();
+        tree.add("B");
+        tree.add("A");
+        tree.add("C");
+        tree.add("D");
+    }
+
+    @Test
+    public void testInterval() {
+        char left = 'K';
+        char right = 'O';
+
+        for (int i = 0; i < 200; i++) {
+            char c = (char) ('A' + (Math.random() * 26));
+            tree.add(Character.toString(c));
+        }
+        // get all elements with inorder
+        Visitor<String> v = new MyVisitor<>();
+        tree.traversal().inorder(v);
+        int count = 0;
+        String s = v.toString();
+        for (int i = 0; i < s.length(); i++) {
+            if (s.charAt(i) >= left && s.charAt(i) <= right) count++;
+        }
+        // now interval
+        v = new MyVisitor<>();
+        tree.traversal().interval(Character.toString(left), Character.toString(right), v);
+        s = v.toString();
+        for (int i = 0; i < s.length(); i++) {
+            char c = s.charAt(i);
+            assertTrue(c >= left && c <= right, c + " in interval "+left+" "+right);
+        }
+        assertEquals(count, s.length(), "size");
+    }
+}