4 files changed, 62 insertions, 27 deletions
diff --git a/core/src/ch/asynk/rustanddust/engine/util/IterableArray.java b/core/src/ch/asynk/rustanddust/engine/util/IterableArray.java
index a8701a2..f310a60 100644
--- a/core/src/ch/asynk/rustanddust/engine/util/IterableArray.java
+++ b/core/src/ch/asynk/rustanddust/engine/util/IterableArray.java
@@ -18,33 +18,6 @@ public class IterableArray<E> extends ArrayList<E> implements Iterator, Iterable
         super(n);
     }
 
-    public void push(E e)
-    {
-        add(e);
-    }
-
-    public E pop()
-    {
-        return remove(size() - 1);
-    }
-
-    public void enqueue(E e)
-    {
-        add(e);
-    }
-
-    public E dequeue()
-    {
-        return remove(0);
-    }
-
-    public boolean addUnique(E e)
-    {
-        if (contains(e)) return false;
-        super.add(e);
-        return true;
-    }
-
     @Override
     @SuppressWarnings("unchecked")
     public Iterator<E> iterator()
diff --git a/core/src/ch/asynk/rustanddust/engine/util/IterableQueue.java b/core/src/ch/asynk/rustanddust/engine/util/IterableQueue.java
new file mode 100644
index 0000000..7e560e2
--- /dev/null
+++ b/core/src/ch/asynk/rustanddust/engine/util/IterableQueue.java
@@ -0,0 +1,19 @@
+package ch.asynk.rustanddust.engine.util;
+
+public class IterableQueue<E> extends IterableArray<E>
+{
+    public IterableQueue(int n)
+    {
+        super(n);
+    }
+
+    public void enqueue(E e)
+    {
+        add(e);
+    }
+
+    public E dequeue()
+    {
+        return remove(0);
+    }
+}
diff --git a/core/src/ch/asynk/rustanddust/engine/util/IterableSet.java b/core/src/ch/asynk/rustanddust/engine/util/IterableSet.java
new file mode 100644
index 0000000..1078e62
--- /dev/null
+++ b/core/src/ch/asynk/rustanddust/engine/util/IterableSet.java
@@ -0,0 +1,17 @@
+package ch.asynk.rustanddust.engine.util;
+
+public class IterableSet<E> extends IterableArray<E>
+{
+    public IterableSet(int n)
+    {
+        super(n);
+    }
+
+    @Override
+    public boolean add(E e)
+    {
+        if (contains(e)) return false;
+        super.add(e);
+        return true;
+    }
+}
diff --git a/core/src/ch/asynk/rustanddust/engine/util/IterableStack.java b/core/src/ch/asynk/rustanddust/engine/util/IterableStack.java
new file mode 100644
index 0000000..4668840
--- /dev/null
+++ b/core/src/ch/asynk/rustanddust/engine/util/IterableStack.java
@@ -0,0 +1,26 @@
+package ch.asynk.rustanddust.engine.util;
+
+public class IterableStack<E> extends IterableArray<E>
+{
+    public IterableStack(int n)
+    {
+        super(n);
+    }
+
+    public void push(E e)
+    {
+        add(e);
+    }
+
+    public E pop()
+    {
+        if (size() <= 0) return null;
+        return remove(size() - 1);
+    }
+
+    public E getTop()
+    {
+        if (size() <= 0) return null;
+        return get(size() - 1);
+    }
+}