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Implement AB6, Aufgabe 1+2

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Lorenz Stechauner
2022-05-17 19:31:19 +02:00
parent b89fc15602
commit f801a331c2
6 changed files with 247 additions and 26 deletions
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8
src/Aufgabe6Test.java
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@ -1,13 +1,13 @@
import org.junit.jupiter.api.Test;
import java.util.HashSet;
import static org.junit.jupiter.api.Assertions.*;
public class Aufgabe6Test {
@Test
public void testEP2() {
/* //TODO: uncomment for testing
NamedBody sun1, mercury1, venus1, earth1, moon1, mars1, deimos1, phobos1, vesta1, pallas1, hygiea1, ceres1;
// create the same 12 named body-force pairs
@ -70,7 +70,7 @@ public class Aufgabe6Test {
set2.add(m);
}
assertTrue(set1.equals(set2));
assertEquals(set1, set2);
MassiveLinkedList list = map.getKeys().toList();
while (list.size() > 0) {
@ -112,7 +112,5 @@ public class Aufgabe6Test {
count++;
}
assertEquals(12, count);
*/ //TODO: uncomment
}
}

4
src/BodyForceTreeMap.java
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@ -103,10 +103,10 @@ public class BodyForceTreeMap {
*/
@Override
public String toString() {
return toString(root);
return (root != null) ? toString(root) : "";
}
private class Item {
private static class Item {
private final Body key;
private Vector3 value;
private Item parent;

2
src/BodyLinkedList.java
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@ -222,7 +222,7 @@ public class BodyLinkedList implements Iterable<Body> {
};
}
private class Item {
private static class Item {
private final Body body;
private Item prev;
private Item next;

51
src/HierarchicalSystem.java
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@ -5,7 +5,7 @@ import codedraw.CodeDraw;
* and an arbitrary number of subsystems (of type 'CosmicSystem') in its orbit.
* This class implements 'CosmicSystem'.
*/
public class HierarchicalSystem implements CosmicSystem {
public class HierarchicalSystem implements CosmicSystem, MassiveIterable {
private final NamedBodyForcePair central;
private CosmicSystem[] orbit;
@ -127,4 +127,53 @@ public class HierarchicalSystem implements CosmicSystem {
return true;
}
@Override
public MassiveIterator iterator() {
return new MassiveIterator() {
private int i = 0;
private MassiveIterator cur = null;
@Override
public Massive next() {
if (cur != null && cur.hasNext()) return cur.next();
for (; i < all.length; i++) {
CosmicSystem sys = all[i];
if (sys instanceof NamedBodyForcePair m) {
i++;
return m.getBody();
} else if (sys instanceof HierarchicalSystem hs) {
cur = hs.iterator();
if (cur.hasNext()) {
i++;
return cur.next();
}
}
}
return null;
}
@Override
public boolean hasNext() {
if (cur != null && cur.hasNext()) return true;
for (; i < all.length; i++) {
CosmicSystem sys = all[i];
if (sys instanceof NamedBodyForcePair) {
return true;
} else if (sys instanceof HierarchicalSystem hs) {
cur = hs.iterator();
if (cur.hasNext()) {
i++;
return true;
}
}
}
return false;
}
};
}
}

204
src/MassiveForceTreeMap.java
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@ -1,12 +1,12 @@
import codedraw.CodeDraw;
/**
* A map that associates an object of 'Massive' with a Vector3. The number of key-value pairs
* is not limited.
*/
// TODO: define further classes and methods for the binary search tree and the implementation
// of MassiveSet, if needed.
public class MassiveForceTreeMap {
// TODO: define missing parts of this class.
public class MassiveForceTreeMap implements MassiveSet {
private int size = 0;
private Item root;
/**
* Adds a new key-value association to this map. If the key already exists in this map,
@ -14,7 +14,37 @@ public class MassiveForceTreeMap {
* Precondition: key != null.
*/
public Vector3 put(Massive key, Vector3 value) {
// TODO: implement method.
if (root == null) {
root = new Item(key, value);
size++;
return null;
}
Item item = root;
while (item != null) {
if (item.key.equals(key)) {
Vector3 old = item.value;
item.value = value;
return old;
} else if (item.key.mass() > key.mass()) {
if (item.left != null) {
item = item.left;
} else {
item.setLeft(new Item(key, value));
size++;
break;
}
} else {
if (item.right != null) {
item = item.right;
} else{
item.setRight(new Item(key, value));
size++;
break;
}
}
}
return null;
}
@ -24,7 +54,16 @@ public class MassiveForceTreeMap {
* Precondition: key != null.
*/
public Vector3 get(Massive key) {
// TODO: implement method.
Item item = root;
while (item != null) {
if (item.key.equals(key)) {
return item.value;
} else if (item.key.mass() > key.mass()) {
item = item.left;
} else {
item = item.right;
}
}
return null;
}
@ -33,17 +72,36 @@ public class MassiveForceTreeMap {
* Precondition: key != null
*/
public boolean containsKey(Massive key) {
// TODO: implement method.
Item item = root;
while (item != null) {
if (item.key.equals(key)) {
return true;
} else if (item.key.mass() > key.mass()) {
item = item.left;
} else {
item = item.right;
}
}
return false;
}
private String toString(Item item) {
String s = "";
if (item == null) {
return s;
}
s += this.toString(item.right);
s += String.format("{%s: %s}\n", item.key, item.value);
s += this.toString(item.left);
return s;
}
/**
* Returns a readable representation of this map, in which key-value pairs are ordered
* descending according to 'key.getMass()'.
*/
public String toString() {
// TODO: implement method.
return "";
return (root != null) ? toString(root) : "";
}
/**
@ -51,10 +109,126 @@ public class MassiveForceTreeMap {
* elements of the returned `MassiveSet` object also affects the keys in this tree map.
*/
public MassiveSet getKeys() {
// TODO: implement method.
return null;
return this;
}
@Override
public void draw(CodeDraw cd) {
}
@Override
public MassiveIterator iterator() {
return new MassiveIterator() {
private Item next = root.getLeftLeaf();
@Override
public Massive next() {
if (next == null) return null;
Massive m = next.key;
Item newNext = (next.right != null) ? next.right.getLeftLeaf() : next.parent;
while (newNext != null && newNext.right == next) {
next = newNext;
newNext = newNext.parent;
}
next = newNext;
return m;
}
@Override
public boolean hasNext() {
return next != null;
}
};
}
@Override
public boolean contains(Massive element) {
return containsKey(element);
}
@Override
public void remove(Massive element) {
Item item = root;
while (item != null) {
if (item.key.equals(element)) {
Item newP = null;
if (item.left != null) {
newP = item.left.getRightLeaf();
} else if (item.right != null) {
newP = item.right.getLeftLeaf();
}
if (item.parent.left == item) {
item.parent.setLeft(newP);
} else {
item.parent.setRight(newP);
}
size--;
return;
} else if (item.key.mass() > element.mass()) {
item = item.left;
} else {
item = item.right;
}
}
}
@Override
public void clear() {
size = 0;
root = null;
}
@Override
public int size() {
return size;
}
@Override
public MassiveLinkedList toList() {
MassiveLinkedList list = new MassiveLinkedList();
for (Massive m : this) {
list.addLast(m);
}
return list;
}
private static class Item {
private final Massive key;
private Vector3 value;
private Item parent;
private Item left;
private Item right;
public Item(Massive key, Vector3 value) {
this.key = key;
this.value = value;
}
public void setLeft(Item left) {
this.left = left;
if (left != null) left.parent = this;
}
public void setRight(Item right) {
this.right = right;
if (right != null) right.parent = this;
}
public Item getLeftLeaf() {
Item cur = this;
while (cur.left != null) {
cur = cur.left;
}
return cur;
}
public Item getRightLeaf() {
Item cur = this;
while (cur.right != null) {
cur = cur.right;
}
return cur;
}
}
}
//TODO: Define additional class(es) implementing the binary search tree and the implementation
// of MassiveSet (either here or in a separate file).

4
src/MassiveLinkedList.java
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@ -98,7 +98,7 @@ public class MassiveLinkedList implements Iterable<Massive> {
return null;
}
Massive m = last.body;
last = last.next;
last = last.prev;
if (last != null) last.setNext(null);
size--;
return m;
@ -194,7 +194,7 @@ public class MassiveLinkedList implements Iterable<Massive> {
};
}
private class Item {
private static class Item {
private final Massive body;
private Item prev;
private Item next;