Fixing bugs found when implementing Bidirectional Iterator unit tests.

-Fixed: AbstractList/ImmutableList/ArraySet/ArrayMap skip/back implementation was causing crashes and didn't update the last returned value.
-Fixed: ArraySet/ArrayMap previous was not subtracting before returning value.
-Fixed: BidirectionalIterator back was calling the object variant instead of the TypeSpecific Variant.
-Fixed: TreeSets/Maps Iterator now fully supports backwards Iterating.
-Added: Specialized skip/back function to improve speed in ImmutableHashSet/LinkedHashSet/CustomLinkedHashSet

src/builder/resources/speiger/assets/collections/templates/collections/BidirectionalIterator.template

@@ -57,7 +57,7 @@ public interface BI_ITERATOR KEY_GENERIC_TYPE extends ITERATOR KEY_GENERIC_TYPE
 	public default int back(int amount) {
 		if(amount < 0) throw new IllegalStateException("Can't go forward");
 		int i = 0;
-		for(;i<amount && hasPrevious();previous(),i++);
+		for(;i<amount && hasPrevious();PREVIOUS(),i++);
 		return i;
 	}
 }

src/builder/resources/speiger/assets/collections/templates/lists/AbstractList.template

@@ -548,8 +548,9 @@ public abstract class ABSTRACT_LIST KEY_GENERIC_TYPE extends ABSTRACT_COLLECTION
 		@Override
 		public int skip(int amount) {
 			if(amount < 0) throw new IllegalStateException("Negative Numbers are not allowed");
-			int steps = Math.min(amount, (size() - 1) - index);
+			int steps = Math.min(amount, size() - index);
 			index += steps;
+			if(steps > 0) lastReturned = Math.min(index-1, size()-1);
 			return steps;
 		}
 		
@@ -558,6 +559,7 @@ public abstract class ABSTRACT_LIST KEY_GENERIC_TYPE extends ABSTRACT_COLLECTION
 			if(amount < 0) throw new IllegalStateException("Negative Numbers are not allowed");
 			int steps = Math.min(amount, index);
 			index -= steps;
+			if(steps > 0) lastReturned = Math.min(index, size()-1);
 			return steps;
 		}
 	}

src/builder/resources/speiger/assets/collections/templates/lists/ImmutableList.template

@@ -556,7 +556,7 @@ public class IMMUTABLE_LIST KEY_GENERIC_TYPE extends ABSTRACT_LIST KEY_GENERIC_T
 		@Override
 		public int skip(int amount) {
 			if(amount < 0) throw new IllegalStateException("Negative Numbers are not allowed");
-			int steps = Math.min(amount, (size() - 1) - index);
+			int steps = Math.min(amount, size() - index);
 			index += steps;
 			return steps;
 		}

src/builder/resources/speiger/assets/collections/templates/maps/impl/customHash/LinkedOpenCustomHashMap.template

@@ -22,7 +22,6 @@ import speiger.src.collections.PACKAGE.maps.interfaces.MAP;
 import speiger.src.collections.PACKAGE.maps.interfaces.ORDERED_MAP;
 import speiger.src.collections.PACKAGE.sets.ABSTRACT_SET;
 import speiger.src.collections.PACKAGE.sets.ORDERED_SET;
-import speiger.src.collections.PACKAGE.sets.SET;
 import speiger.src.collections.PACKAGE.utils.STRATEGY;
 import speiger.src.collections.VALUE_PACKAGE.collections.VALUE_ABSTRACT_COLLECTION;
 import speiger.src.collections.VALUE_PACKAGE.collections.VALUE_COLLECTION;
@@ -57,7 +56,7 @@ import speiger.src.collections.objects.functions.function.ObjectObjectUnaryOpera
 import speiger.src.collections.objects.collections.ObjectBidirectionalIterator;
 import speiger.src.collections.objects.lists.ObjectListIterator;
 import speiger.src.collections.objects.sets.AbstractObjectSet;
-import speiger.src.collections.objects.sets.ObjectSet;
+import speiger.src.collections.objects.sets.ObjectOrderedSet;
 #endif
 import speiger.src.collections.utils.HashUtil;
 
@@ -285,7 +284,7 @@ public class LINKED_CUSTOM_HASH_MAP KEY_VALUE_GENERIC_TYPE extends CUSTOM_HASH_M
 	
 	@Override
 	public boolean moveToFirst(KEY_TYPE key) {
-		if(strategy.equals(FIRST_ENTRY_KEY(), key)) return false;
+		if(isEmpty() || strategy.equals(FIRST_ENTRY_KEY(), key)) return false;
 		if(strategy.equals(key, EMPTY_KEY_VALUE)) {
 			if(containsNull) {
 				moveToFirstIndex(nullIndex);
@@ -307,7 +306,7 @@ public class LINKED_CUSTOM_HASH_MAP KEY_VALUE_GENERIC_TYPE extends CUSTOM_HASH_M
 	
 	@Override
 	public boolean moveToLast(KEY_TYPE key) {
-		if(strategy.equals(LAST_ENTRY_KEY(), key)) return false;
+		if(isEmpty() || strategy.equals(LAST_ENTRY_KEY(), key)) return false;
 		if(strategy.equals(key, EMPTY_KEY_VALUE)) {
 			if(containsNull) {
 				moveToLastIndex(nullIndex);
@@ -421,15 +420,15 @@ public class LINKED_CUSTOM_HASH_MAP KEY_VALUE_GENERIC_TYPE extends CUSTOM_HASH_M
 	}
 	
 	@Override
-	public ObjectSet<MAP.Entry KEY_VALUE_GENERIC_TYPE> ENTRY_SET() {
+	public ObjectOrderedSet<MAP.Entry KEY_VALUE_GENERIC_TYPE> ENTRY_SET() {
 		if(entrySet == null) entrySet = new MapEntrySet();
-		return entrySet;
+		return (ObjectOrderedSet<MAP.Entry KEY_VALUE_GENERIC_TYPE>)entrySet;
 	}
 	
 	@Override
-	public SET KEY_GENERIC_TYPE keySet() {
+	public ORDERED_SET KEY_GENERIC_TYPE keySet() {
 		if(keySet == null) keySet = new KeySet();
-		return keySet;
+		return (ORDERED_SET KEY_GENERIC_TYPE)keySet;
 	}
 	
 	@Override

src/builder/resources/speiger/assets/collections/templates/maps/impl/hash/LinkedOpenHashMap.template

@@ -22,7 +22,6 @@ import speiger.src.collections.PACKAGE.maps.interfaces.MAP;
 import speiger.src.collections.PACKAGE.maps.interfaces.ORDERED_MAP;
 import speiger.src.collections.PACKAGE.sets.ABSTRACT_SET;
 import speiger.src.collections.PACKAGE.sets.ORDERED_SET;
-import speiger.src.collections.PACKAGE.sets.SET;
 import speiger.src.collections.VALUE_PACKAGE.collections.VALUE_ABSTRACT_COLLECTION;
 import speiger.src.collections.VALUE_PACKAGE.collections.VALUE_COLLECTION;
 import speiger.src.collections.VALUE_PACKAGE.collections.VALUE_ITERATOR;
@@ -56,7 +55,7 @@ import speiger.src.collections.objects.functions.function.ObjectObjectUnaryOpera
 import speiger.src.collections.objects.collections.ObjectBidirectionalIterator;
 import speiger.src.collections.objects.lists.ObjectListIterator;
 import speiger.src.collections.objects.sets.AbstractObjectSet;
-import speiger.src.collections.objects.sets.ObjectSet;
+import speiger.src.collections.objects.sets.ObjectOrderedSet;
 #endif
 import speiger.src.collections.utils.HashUtil;
 
@@ -262,7 +261,7 @@ public class LINKED_HASH_MAP KEY_VALUE_GENERIC_TYPE extends HASH_MAP KEY_VALUE_G
 	
 	@Override
 	public boolean moveToFirst(KEY_TYPE key) {
-		if(KEY_EQUALS(FIRST_ENTRY_KEY(), key)) return false;
+		if(isEmpty() || KEY_EQUALS(FIRST_ENTRY_KEY(), key)) return false;
 		if(KEY_EQUALS_NULL(key)) {
 			if(containsNull) {
 				moveToFirstIndex(nullIndex);
@@ -284,7 +283,7 @@ public class LINKED_HASH_MAP KEY_VALUE_GENERIC_TYPE extends HASH_MAP KEY_VALUE_G
 	
 	@Override
 	public boolean moveToLast(KEY_TYPE key) {
-		if(KEY_EQUALS(LAST_ENTRY_KEY(), key)) return false;
+		if(isEmpty() || KEY_EQUALS(LAST_ENTRY_KEY(), key)) return false;
 		if(KEY_EQUALS_NULL(key)) {
 			if(containsNull) {
 				moveToLastIndex(nullIndex);
@@ -425,15 +424,15 @@ public class LINKED_HASH_MAP KEY_VALUE_GENERIC_TYPE extends HASH_MAP KEY_VALUE_G
 	}
 	
 	@Override
-	public ObjectSet<MAP.Entry KEY_VALUE_GENERIC_TYPE> ENTRY_SET() {
+	public ObjectOrderedSet<MAP.Entry KEY_VALUE_GENERIC_TYPE> ENTRY_SET() {
 		if(entrySet == null) entrySet = new MapEntrySet();
-		return entrySet;
+		return (ObjectOrderedSet<MAP.Entry KEY_VALUE_GENERIC_TYPE>)entrySet;
 	}
 	
 	@Override
-	public SET KEY_GENERIC_TYPE keySet() {
+	public ORDERED_SET KEY_GENERIC_TYPE keySet() {
 		if(keySet == null) keySet = new KeySet();
-		return keySet;
+		return (ORDERED_SET KEY_GENERIC_TYPE)keySet;
 	}
 	
 	@Override

src/builder/resources/speiger/assets/collections/templates/maps/impl/immutable/ImmutableOpenHashMap.template

@@ -25,7 +25,9 @@ import speiger.src.collections.PACKAGE.lists.LIST_ITERATOR;
 import speiger.src.collections.PACKAGE.maps.interfaces.ORDERED_MAP;
 import speiger.src.collections.PACKAGE.maps.abstracts.ABSTRACT_MAP;
 import speiger.src.collections.PACKAGE.maps.interfaces.MAP;
+#if !TYPE_OBJECT
 import speiger.src.collections.PACKAGE.sets.ORDERED_SET;
+#endif
 import speiger.src.collections.PACKAGE.utils.maps.MAPS;
 #if !TYPE_OBJECT
 import speiger.src.collections.PACKAGE.utils.ARRAYS;
@@ -47,7 +49,6 @@ import speiger.src.collections.VALUE_PACKAGE.functions.function.VALUE_PREDICATE;
 #endif
 #if !TYPE_OBJECT
 import speiger.src.collections.PACKAGE.sets.ABSTRACT_SET;
-import speiger.src.collections.PACKAGE.sets.SET;
 #endif
 import speiger.src.collections.VALUE_PACKAGE.collections.VALUE_ABSTRACT_COLLECTION;
 import speiger.src.collections.VALUE_PACKAGE.collections.VALUE_COLLECTION;
@@ -70,7 +71,7 @@ import speiger.src.collections.objects.functions.function.ObjectObjectUnaryOpera
 import speiger.src.collections.objects.lists.ObjectListIterator;
 #endif
 import speiger.src.collections.objects.sets.AbstractObjectSet;
-import speiger.src.collections.objects.sets.ObjectSet;
+import speiger.src.collections.objects.sets.ObjectOrderedSet;
 import speiger.src.collections.utils.HashUtil;
 import speiger.src.collections.utils.SanityChecks;
 
@@ -100,9 +101,9 @@ public class IMMUTABLE_HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_
 	/** The Last Index in the Map */
 	protected int lastIndex = -1;
 	/** EntrySet cache */
-	protected transient FastEntrySet KEY_VALUE_GENERIC_TYPE entrySet;
+	protected transient FastOrderedSet KEY_VALUE_GENERIC_TYPE entrySet;
 	/** KeySet cache */
-	protected transient SET KEY_GENERIC_TYPE keySet;
+	protected transient ORDERED_SET KEY_GENERIC_TYPE keySet;
 	/** Values cache */
 	protected transient VALUE_COLLECTION VALUE_GENERIC_TYPE valuesC;
 	
@@ -429,13 +430,13 @@ public class IMMUTABLE_HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_
 	}	
 
 	@Override
-	public ObjectSet<MAP.Entry KEY_VALUE_GENERIC_TYPE> ENTRY_SET() {
+	public ObjectOrderedSet<MAP.Entry KEY_VALUE_GENERIC_TYPE> ENTRY_SET() {
 		if(entrySet == null) entrySet = new MapEntrySet();
 		return entrySet;
 	}
 	
 	@Override
-	public SET KEY_GENERIC_TYPE keySet() {
+	public ORDERED_SET KEY_GENERIC_TYPE keySet() {
 		if(keySet == null) keySet = new KeySet();
 		return keySet;
 	}

src/builder/resources/speiger/assets/collections/templates/maps/impl/misc/ArrayMap.template

@@ -27,7 +27,6 @@ import speiger.src.collections.PACKAGE.maps.interfaces.MAP;
 import speiger.src.collections.PACKAGE.maps.interfaces.ORDERED_MAP;
 import speiger.src.collections.PACKAGE.sets.ABSTRACT_SET;
 import speiger.src.collections.PACKAGE.sets.ORDERED_SET;
-import speiger.src.collections.PACKAGE.sets.SET;
 import speiger.src.collections.PACKAGE.utils.maps.MAPS;
 import speiger.src.collections.VALUE_PACKAGE.collections.VALUE_ABSTRACT_COLLECTION;
 import speiger.src.collections.VALUE_PACKAGE.collections.VALUE_COLLECTION;
@@ -90,7 +89,7 @@ public class ARRAY_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_GEN
 	/** Amount of Elements stored in the ArrayMap */
 	protected int size = 0;
 	/** KeySet cache */
-	protected SET KEY_GENERIC_TYPE keySet;
+	protected ORDERED_SET KEY_GENERIC_TYPE keySet;
 	/** Values cache */
 	protected VALUE_COLLECTION VALUE_GENERIC_TYPE valuesC;
 	/** EntrySet cache */
@@ -270,7 +269,7 @@ public class ARRAY_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_GEN
 	@Override
 	public boolean moveToLast(KEY_TYPE key) {
 		int index = findIndex(key);
-		if(index < size-1) {
+		if(index >= 0 && index < size-1) {
 			moveIndexToLast(index);
 			return true;
 		}
@@ -437,7 +436,7 @@ public class ARRAY_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_GEN
 	}
 	
 	@Override
-	public SET KEY_GENERIC_TYPE keySet() {
+	public ORDERED_SET KEY_GENERIC_TYPE keySet() {
 		if(keySet == null) keySet = new KeySet();
 		return keySet;
 	}
@@ -1249,7 +1248,9 @@ public class ARRAY_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_GEN
 		@Override
 		public void remove() {
 			super.remove();
-			entry.index = -1;
+			if(entry != null && entry.index != -1) {
+				entry.index = -1;				
+			}
 		}
 		
 		@Override
@@ -1263,6 +1264,7 @@ public class ARRAY_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_GEN
 		public KeyIterator(KEY_TYPE element) {
 			index = findIndex(element);
 		}
+		
 		@Override
 		public KEY_TYPE PREVIOUS() {
 			return keys[previousEntry()];
@@ -1319,8 +1321,7 @@ public class ARRAY_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_GEN
 		}
 		
 		public void remove() {
-			if(lastReturned == -1)
+			if(lastReturned == -1) throw new IllegalStateException();
-				throw new IllegalStateException();
 			removeIndex(lastReturned);
 			if(lastReturned < index)
 				index--;
@@ -1329,8 +1330,8 @@ public class ARRAY_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_GEN
 		
 		public int previousEntry() {
 			if(!hasPrevious()) throw new NoSuchElementException();
-			lastReturned = index;
+			index--;
-			return index--;
+			return (lastReturned = index);
 		}
 		
 		public int nextEntry() {
@@ -1341,8 +1342,9 @@ public class ARRAY_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_GEN
 		
 		public int skip(int amount) {
 			if(amount < 0) throw new IllegalStateException("Negative Numbers are not allowed");
-			int steps = Math.min(amount, (size() - 1) - index);
+			int steps = Math.min(amount, size() - index);
 			index += steps;
+			if(steps > 0) lastReturned = Math.min(index-1, size()-1);
 			return steps;
 		}
 		
@@ -1350,6 +1352,7 @@ public class ARRAY_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_GEN
 			if(amount < 0) throw new IllegalStateException("Negative Numbers are not allowed");
 			int steps = Math.min(amount, index);
 			index -= steps;
+			if(steps > 0) lastReturned = Math.min(index, size()-1);
 			return steps;
 		}
 	}

src/builder/resources/speiger/assets/collections/templates/maps/impl/misc/LinkedEnumMap.template

@@ -17,7 +17,6 @@ import speiger.src.collections.PACKAGE.maps.interfaces.MAP;
 import speiger.src.collections.PACKAGE.maps.interfaces.ORDERED_MAP;
 import speiger.src.collections.PACKAGE.sets.ABSTRACT_SET;
 import speiger.src.collections.PACKAGE.sets.ORDERED_SET;
-import speiger.src.collections.PACKAGE.sets.SET;
 import speiger.src.collections.VALUE_PACKAGE.collections.VALUE_ABSTRACT_COLLECTION;
 import speiger.src.collections.VALUE_PACKAGE.collections.VALUE_COLLECTION;
 import speiger.src.collections.VALUE_PACKAGE.collections.VALUE_ITERATOR;
@@ -29,7 +28,6 @@ import speiger.src.collections.VALUE_PACKAGE.lists.VALUE_LIST_ITERATOR;
 import speiger.src.collections.objects.collections.ObjectBidirectionalIterator;
 import speiger.src.collections.objects.lists.ObjectListIterator;
 import speiger.src.collections.objects.sets.AbstractObjectSet;
-import speiger.src.collections.objects.sets.ObjectSet;
 #endif
 
 /**
@@ -315,15 +313,15 @@ public class LINKED_ENUM_MAP KEY_ENUM_VALUE_GENERIC_TYPE extends ENUM_MAP KEY_VA
 	}
 	
 	@Override
-	public ObjectSet<MAP.Entry KEY_VALUE_GENERIC_TYPE> ENTRY_SET() {
+	public ObjectOrderedSet<MAP.Entry KEY_VALUE_GENERIC_TYPE> ENTRY_SET() {
 		if(entrySet == null) entrySet = new MapEntrySet();
-		return entrySet;
+		return (ObjectOrderedSet<MAP.Entry KEY_VALUE_GENERIC_TYPE>)entrySet;
 	}
 	
 	@Override
-	public SET KEY_GENERIC_TYPE keySet() {
+	public ORDERED_SET KEY_GENERIC_TYPE keySet() {
 		if(keySet == null) keySet = new KeySet();
-		return keySet;
+		return (ORDERED_SET KEY_GENERIC_TYPE)keySet;
 	}
 	
 	@Override

src/builder/resources/speiger/assets/collections/templates/maps/impl/tree/AVLTreeMap.template

@@ -2051,26 +2051,36 @@ public class AVL_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_
 		class DecsendingSubEntryIterator extends SubMapEntryIterator implements ObjectBidirectionalIterator<MAP.Entry KEY_VALUE_GENERIC_TYPE>
 		{
 			public DecsendingSubEntryIterator(Node KEY_VALUE_GENERIC_TYPE first, Node KEY_VALUE_GENERIC_TYPE forwardFence, Node KEY_VALUE_GENERIC_TYPE backwardFence) {
-				super(first, forwardFence, backwardFence);
+				super(first, forwardFence, backwardFence, false);
+			}
+			
+			@Override
+			protected Node KEY_VALUE_GENERIC_TYPE moveNext(Node KEY_VALUE_GENERIC_TYPE node) {
+				return node.previous();
+			}
+			
+			@Override
+			protected Node KEY_VALUE_GENERIC_TYPE movePrevious(Node KEY_VALUE_GENERIC_TYPE node) {
+				return node.next();
 			}
 			
 			@Override
 			public MAP.Entry KEY_VALUE_GENERIC_TYPE previous() {
 				if(!hasPrevious()) throw new NoSuchElementException();
-				return nextEntry();
+				return previousEntry();
 			}
 
 			@Override
 			public MAP.Entry KEY_VALUE_GENERIC_TYPE next() {
 				if(!hasNext()) throw new NoSuchElementException();
-				return previousEntry();
+				return nextEntry();
 			}
 		}
 		
 		class AcsendingSubEntryIterator extends SubMapEntryIterator implements ObjectBidirectionalIterator<MAP.Entry KEY_VALUE_GENERIC_TYPE>
 		{
 			public AcsendingSubEntryIterator(Node KEY_VALUE_GENERIC_TYPE first, Node KEY_VALUE_GENERIC_TYPE forwardFence, Node KEY_VALUE_GENERIC_TYPE backwardFence) {
-				super(first, forwardFence, backwardFence);
+				super(first, forwardFence, backwardFence, true);
 			}
 
 			@Override
@@ -2089,26 +2099,36 @@ public class AVL_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_
 		class DecsendingSubKeyIterator extends SubMapEntryIterator implements BI_ITERATOR KEY_GENERIC_TYPE
 		{
 			public DecsendingSubKeyIterator(Node KEY_VALUE_GENERIC_TYPE first, Node KEY_VALUE_GENERIC_TYPE forwardFence, Node KEY_VALUE_GENERIC_TYPE backwardFence) {
-				super(first, forwardFence, backwardFence);
+				super(first, forwardFence, backwardFence, false);
+			}
+			
+			@Override
+			protected Node KEY_VALUE_GENERIC_TYPE moveNext(Node KEY_VALUE_GENERIC_TYPE node) {
+				return node.previous();
+			}
+			
+			@Override
+			protected Node KEY_VALUE_GENERIC_TYPE movePrevious(Node KEY_VALUE_GENERIC_TYPE node) {
+				return node.next();
 			}
 			
 			@Override
 			public KEY_TYPE PREVIOUS() {
 				if(!hasPrevious()) throw new NoSuchElementException();
-				return nextEntry().key;
+				return previousEntry().key;
 			}
 
 			@Override
 			public KEY_TYPE NEXT() {
 				if(!hasNext()) throw new NoSuchElementException();
-				return previousEntry().key;
+				return nextEntry().key;
 			}
 		}
 		
 		class AcsendingSubKeyIterator extends SubMapEntryIterator implements BI_ITERATOR KEY_GENERIC_TYPE
 		{
 			public AcsendingSubKeyIterator(Node KEY_VALUE_GENERIC_TYPE first, Node KEY_VALUE_GENERIC_TYPE forwardFence, Node KEY_VALUE_GENERIC_TYPE backwardFence) {
-				super(first, forwardFence, backwardFence);
+				super(first, forwardFence, backwardFence, true);
 			}
 
 			@Override
@@ -2127,7 +2147,7 @@ public class AVL_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_
 		class AcsendingSubValueIterator extends SubMapEntryIterator implements VALUE_BI_ITERATOR VALUE_GENERIC_TYPE
 		{
 			public AcsendingSubValueIterator(Node KEY_VALUE_GENERIC_TYPE first, Node KEY_VALUE_GENERIC_TYPE forwardFence, Node KEY_VALUE_GENERIC_TYPE backwardFence) {
-				super(first, forwardFence, backwardFence);
+				super(first, forwardFence, backwardFence, true);
 			}
 
 			@Override
@@ -2146,39 +2166,60 @@ public class AVL_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_
 		class DecsendingSubValueIterator extends SubMapEntryIterator implements VALUE_BI_ITERATOR VALUE_GENERIC_TYPE
 		{
 			public DecsendingSubValueIterator(Node KEY_VALUE_GENERIC_TYPE first, Node KEY_VALUE_GENERIC_TYPE forwardFence, Node KEY_VALUE_GENERIC_TYPE backwardFence) {
-				super(first, forwardFence, backwardFence);
+				super(first, forwardFence, backwardFence, false);
+			}
+			
+			@Override
+			protected Node KEY_VALUE_GENERIC_TYPE moveNext(Node KEY_VALUE_GENERIC_TYPE node) {
+				return node.previous();
+			}
+			
+			@Override
+			protected Node KEY_VALUE_GENERIC_TYPE movePrevious(Node KEY_VALUE_GENERIC_TYPE node) {
+				return node.next();
 			}
 			
 			@Override
 			public VALUE_TYPE VALUE_PREVIOUS() {
 				if(!hasPrevious()) throw new NoSuchElementException();
-				return nextEntry().value;
+				return previousEntry().value;
 			}
 
 			@Override
 			public VALUE_TYPE VALUE_NEXT() {
 				if(!hasNext()) throw new NoSuchElementException();
-				return previousEntry().value;
+				return nextEntry().value;
 			}
 		}
 		
 		abstract class SubMapEntryIterator
 		{
+			final boolean isForward;
 			boolean wasForward;
 			Node KEY_VALUE_GENERIC_TYPE lastReturned;
 			Node KEY_VALUE_GENERIC_TYPE next;
+			Node KEY_VALUE_GENERIC_TYPE previous;
 			boolean unboundForwardFence;
 			boolean unboundBackwardFence;
 			KEY_TYPE forwardFence;
 			KEY_TYPE backwardFence;
 			
-			public SubMapEntryIterator(Node KEY_VALUE_GENERIC_TYPE first, Node KEY_VALUE_GENERIC_TYPE forwardFence, Node KEY_VALUE_GENERIC_TYPE backwardFence)
+			public SubMapEntryIterator(Node KEY_VALUE_GENERIC_TYPE first, Node KEY_VALUE_GENERIC_TYPE forwardFence, Node KEY_VALUE_GENERIC_TYPE backwardFence, boolean isForward) {
-			{
 				next = first;
+				previous = first == null ? null : movePrevious(first);
 				this.forwardFence = forwardFence == null ? EMPTY_KEY_VALUE : forwardFence.key;
 				this.backwardFence = backwardFence == null ? EMPTY_KEY_VALUE : backwardFence.key;
 				unboundForwardFence = forwardFence == null;
 				unboundBackwardFence = backwardFence == null;
+				this.isForward = isForward;
+			}
+			
+			protected Node KEY_VALUE_GENERIC_TYPE moveNext(Node KEY_VALUE_GENERIC_TYPE node) {
+				return node.next();
+			}
+			
+			protected Node KEY_VALUE_GENERIC_TYPE movePrevious(Node KEY_VALUE_GENERIC_TYPE node) {
+				return node.previous();
 			}
 			
 			public boolean hasNext() {
@@ -2187,26 +2228,30 @@ public class AVL_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_
 			
 			protected Node KEY_VALUE_GENERIC_TYPE nextEntry() {
 				lastReturned = next;
+				previous = next;
 				Node KEY_VALUE_GENERIC_TYPE result = next;
-				next = next.next();
+				next = moveNext(next);
-				wasForward = true;
+				wasForward = isForward;
 				return result;
 			}
 			
 			public boolean hasPrevious() {
-                return next != null && (unboundBackwardFence || next.key != backwardFence);
+                return previous != null && (unboundBackwardFence || previous.key != backwardFence);
 			}
 			
 			protected Node KEY_VALUE_GENERIC_TYPE previousEntry() {
-				lastReturned = next;
+				lastReturned = previous;
-				Node KEY_VALUE_GENERIC_TYPE result = next;
+				next = previous;
-				next = next.previous();
+				Node KEY_VALUE_GENERIC_TYPE result = previous;
-				wasForward = false;
+				previous = movePrevious(previous);
+				wasForward = !isForward;
 				return result;
 			}
 			
 			public void remove() {
 				if(lastReturned == null) throw new IllegalStateException();
+				if(next == lastReturned) next = moveNext(next);
+				if(previous == lastReturned) previous = movePrevious(previous);
 				if(wasForward && lastReturned.needsSuccessor()) next = lastReturned;
 				map.removeNode(lastReturned);
 				lastReturned = null;
@@ -2520,19 +2565,29 @@ public class AVL_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_
 	class DescendingKeyIterator extends MapEntryIterator implements BI_ITERATOR KEY_GENERIC_TYPE
 	{
 		public DescendingKeyIterator(Node KEY_VALUE_GENERIC_TYPE first) {
-			super(first);
+			super(first, false);
+		}
+		
+		@Override
+		protected Node KEY_VALUE_GENERIC_TYPE moveNext(Node KEY_VALUE_GENERIC_TYPE node) {
+			return node.previous();
+		}
+		
+		@Override
+		protected Node KEY_VALUE_GENERIC_TYPE movePrevious(Node KEY_VALUE_GENERIC_TYPE node) {
+			return node.next();
 		}
 		
 		@Override
 		public KEY_TYPE PREVIOUS() {
 			if(!hasPrevious()) throw new NoSuchElementException();
-			return nextEntry().key;
+			return previousEntry().key;
 		}
 
 		@Override
 		public KEY_TYPE NEXT() {
 			if(!hasNext()) throw new NoSuchElementException();
-			return previousEntry().key;
+			return nextEntry().key;
 		}
 	}
 	
@@ -2540,7 +2595,7 @@ public class AVL_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_
 	{
 		public AscendingMapEntryIterator(Node KEY_VALUE_GENERIC_TYPE first)
 		{
-			super(first);
+			super(first, true);
 		}
 
 		@Override
@@ -2559,7 +2614,7 @@ public class AVL_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_
 	class AscendingValueIterator extends MapEntryIterator implements VALUE_BI_ITERATOR VALUE_GENERIC_TYPE
 	{
 		public AscendingValueIterator(Node KEY_VALUE_GENERIC_TYPE first) {
-			super(first);
+			super(first, true);
 		}
 
 		@Override
@@ -2578,7 +2633,7 @@ public class AVL_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_
 	class AscendingKeyIterator extends MapEntryIterator implements BI_ITERATOR KEY_GENERIC_TYPE
 	{
 		public AscendingKeyIterator(Node KEY_VALUE_GENERIC_TYPE first) {
-			super(first);
+			super(first, true);
 		}
 
 		@Override
@@ -2596,13 +2651,24 @@ public class AVL_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_
 	
 	abstract class MapEntryIterator
 	{
+		final boolean isForward;
 		boolean wasMoved = false;
 		Node KEY_VALUE_GENERIC_TYPE lastReturned;
 		Node KEY_VALUE_GENERIC_TYPE next;
+		Node KEY_VALUE_GENERIC_TYPE previous;
 		
-		public MapEntryIterator(Node KEY_VALUE_GENERIC_TYPE first)
+		public MapEntryIterator(Node KEY_VALUE_GENERIC_TYPE first, boolean isForward) {
-		{
 			next = first;
+			previous = first == null ? null : movePrevious(first);
+			this.isForward = isForward;
+		}
+		
+		protected Node KEY_VALUE_GENERIC_TYPE moveNext(Node KEY_VALUE_GENERIC_TYPE node) {
+			return node.next();
+		}
+		
+		protected Node KEY_VALUE_GENERIC_TYPE movePrevious(Node KEY_VALUE_GENERIC_TYPE node) {
+			return node.previous();
 		}
 		
 		public boolean hasNext() {
@@ -2611,26 +2677,30 @@ public class AVL_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_
 		
 		protected Node KEY_VALUE_GENERIC_TYPE nextEntry() {
 			lastReturned = next;
+			previous = next;
 			Node KEY_VALUE_GENERIC_TYPE result = next;
-			next = next.next();
+			next = moveNext(next);
-			wasMoved = true;
+			wasMoved = isForward;
 			return result;
 		}
 		
 		public boolean hasPrevious() {
-            return next != null;
+            return previous != null;
 		}
 		
 		protected Node KEY_VALUE_GENERIC_TYPE previousEntry() {
-			lastReturned = next;
+			lastReturned = previous;
-			Node KEY_VALUE_GENERIC_TYPE result = next;
+			next = previous;
-			next = next.previous();
+			Node KEY_VALUE_GENERIC_TYPE result = previous;
-			wasMoved = false;
+			previous = movePrevious(previous);
+			wasMoved = !isForward;
 			return result;
 		}
 		
 		public void remove() {
 			if(lastReturned == null) throw new IllegalStateException();
+			if(next == lastReturned) next = moveNext(next);
+			if(previous == lastReturned) previous = movePrevious(previous);
 			if(wasMoved && lastReturned.needsSuccessor()) next = lastReturned;
 			removeNode(lastReturned);
 			lastReturned = null;

src/builder/resources/speiger/assets/collections/templates/maps/impl/tree/RBTreeMap.template

@@ -2118,26 +2118,36 @@ public class RB_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_G
 		class DecsendingSubEntryIterator extends SubMapEntryIterator implements ObjectBidirectionalIterator<MAP.Entry KEY_VALUE_GENERIC_TYPE>
 		{
 			public DecsendingSubEntryIterator(Node KEY_VALUE_GENERIC_TYPE first, Node KEY_VALUE_GENERIC_TYPE forwardFence, Node KEY_VALUE_GENERIC_TYPE backwardFence) {
-				super(first, forwardFence, backwardFence);
+				super(first, forwardFence, backwardFence, false);
+			}
+			
+			@Override
+			protected Node KEY_VALUE_GENERIC_TYPE moveNext(Node KEY_VALUE_GENERIC_TYPE node) {
+				return node.previous();
+			}
+			
+			@Override
+			protected Node KEY_VALUE_GENERIC_TYPE movePrevious(Node KEY_VALUE_GENERIC_TYPE node) {
+				return node.next();
 			}
 			
 			@Override
 			public MAP.Entry KEY_VALUE_GENERIC_TYPE previous() {
 				if(!hasPrevious()) throw new NoSuchElementException();
-				return nextEntry();
+				return previousEntry();
 			}
 
 			@Override
 			public MAP.Entry KEY_VALUE_GENERIC_TYPE next() {
 				if(!hasNext()) throw new NoSuchElementException();
-				return previousEntry();
+				return nextEntry();
 			}
 		}
 		
 		class AcsendingSubEntryIterator extends SubMapEntryIterator implements ObjectBidirectionalIterator<MAP.Entry KEY_VALUE_GENERIC_TYPE>
 		{
 			public AcsendingSubEntryIterator(Node KEY_VALUE_GENERIC_TYPE first, Node KEY_VALUE_GENERIC_TYPE forwardFence, Node KEY_VALUE_GENERIC_TYPE backwardFence) {
-				super(first, forwardFence, backwardFence);
+				super(first, forwardFence, backwardFence, true);
 			}
 
 			@Override
@@ -2156,26 +2166,36 @@ public class RB_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_G
 		class DecsendingSubKeyIterator extends SubMapEntryIterator implements BI_ITERATOR KEY_GENERIC_TYPE
 		{
 			public DecsendingSubKeyIterator(Node KEY_VALUE_GENERIC_TYPE first, Node KEY_VALUE_GENERIC_TYPE forwardFence, Node KEY_VALUE_GENERIC_TYPE backwardFence) {
-				super(first, forwardFence, backwardFence);
+				super(first, forwardFence, backwardFence, false);
+			}
+			
+			@Override
+			protected Node KEY_VALUE_GENERIC_TYPE moveNext(Node KEY_VALUE_GENERIC_TYPE node) {
+				return node.previous();
+			}
+			
+			@Override
+			protected Node KEY_VALUE_GENERIC_TYPE movePrevious(Node KEY_VALUE_GENERIC_TYPE node) {
+				return node.next();
 			}
 			
 			@Override
 			public KEY_TYPE PREVIOUS() {
 				if(!hasPrevious()) throw new NoSuchElementException();
-				return nextEntry().key;
+				return previousEntry().key;
 			}
 
 			@Override
 			public KEY_TYPE NEXT() {
 				if(!hasNext()) throw new NoSuchElementException();
-				return previousEntry().key;
+				return nextEntry().key;
 			}
 		}
 		
 		class AcsendingSubKeyIterator extends SubMapEntryIterator implements BI_ITERATOR KEY_GENERIC_TYPE
 		{
 			public AcsendingSubKeyIterator(Node KEY_VALUE_GENERIC_TYPE first, Node KEY_VALUE_GENERIC_TYPE forwardFence, Node KEY_VALUE_GENERIC_TYPE backwardFence) {
-				super(first, forwardFence, backwardFence);
+				super(first, forwardFence, backwardFence, true);
 			}
 
 			@Override
@@ -2194,7 +2214,7 @@ public class RB_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_G
 		class AcsendingSubValueIterator extends SubMapEntryIterator implements VALUE_BI_ITERATOR VALUE_GENERIC_TYPE
 		{
 			public AcsendingSubValueIterator(Node KEY_VALUE_GENERIC_TYPE first, Node KEY_VALUE_GENERIC_TYPE forwardFence, Node KEY_VALUE_GENERIC_TYPE backwardFence) {
-				super(first, forwardFence, backwardFence);
+				super(first, forwardFence, backwardFence, true);
 			}
 
 			@Override
@@ -2213,39 +2233,60 @@ public class RB_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_G
 		class DecsendingSubValueIterator extends SubMapEntryIterator implements VALUE_BI_ITERATOR VALUE_GENERIC_TYPE
 		{
 			public DecsendingSubValueIterator(Node KEY_VALUE_GENERIC_TYPE first, Node KEY_VALUE_GENERIC_TYPE forwardFence, Node KEY_VALUE_GENERIC_TYPE backwardFence) {
-				super(first, forwardFence, backwardFence);
+				super(first, forwardFence, backwardFence, false);
+			}
+			
+			@Override
+			protected Node KEY_VALUE_GENERIC_TYPE moveNext(Node KEY_VALUE_GENERIC_TYPE node) {
+				return node.previous();
+			}
+			
+			@Override
+			protected Node KEY_VALUE_GENERIC_TYPE movePrevious(Node KEY_VALUE_GENERIC_TYPE node) {
+				return node.next();
 			}
 			
 			@Override
 			public VALUE_TYPE VALUE_PREVIOUS() {
 				if(!hasPrevious()) throw new NoSuchElementException();
-				return nextEntry().value;
+				return previousEntry().value;
 			}
 
 			@Override
 			public VALUE_TYPE VALUE_NEXT() {
 				if(!hasNext()) throw new NoSuchElementException();
-				return previousEntry().value;
+				return nextEntry().value;
 			}
 		}
 		
 		abstract class SubMapEntryIterator
 		{
+			final boolean isForward;
 			boolean wasForward;
 			Node KEY_VALUE_GENERIC_TYPE lastReturned;
 			Node KEY_VALUE_GENERIC_TYPE next;
+			Node KEY_VALUE_GENERIC_TYPE previous;
 			boolean unboundForwardFence;
 			boolean unboundBackwardFence;
 			KEY_TYPE forwardFence;
 			KEY_TYPE backwardFence;
 			
-			public SubMapEntryIterator(Node KEY_VALUE_GENERIC_TYPE first, Node KEY_VALUE_GENERIC_TYPE forwardFence, Node KEY_VALUE_GENERIC_TYPE backwardFence)
+			public SubMapEntryIterator(Node KEY_VALUE_GENERIC_TYPE first, Node KEY_VALUE_GENERIC_TYPE forwardFence, Node KEY_VALUE_GENERIC_TYPE backwardFence, boolean isForward) {
-			{
 				next = first;
+				previous = first == null ? null : movePrevious(first);
 				this.forwardFence = forwardFence == null ? EMPTY_KEY_VALUE : forwardFence.key;
 				this.backwardFence = backwardFence == null ? EMPTY_KEY_VALUE : backwardFence.key;
 				unboundForwardFence = forwardFence == null;
 				unboundBackwardFence = backwardFence == null;
+				this.isForward = isForward;
+			}
+			
+			protected Node KEY_VALUE_GENERIC_TYPE moveNext(Node KEY_VALUE_GENERIC_TYPE node) {
+				return node.next();
+			}
+			
+			protected Node KEY_VALUE_GENERIC_TYPE movePrevious(Node KEY_VALUE_GENERIC_TYPE node) {
+				return node.previous();
 			}
 			
 			public boolean hasNext() {
@@ -2254,26 +2295,30 @@ public class RB_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_G
 			
 			protected Node KEY_VALUE_GENERIC_TYPE nextEntry() {
 				lastReturned = next;
+				previous = next;
 				Node KEY_VALUE_GENERIC_TYPE result = next;
-				next = next.next();
+				next = moveNext(next);
-				wasForward = true;
+				wasForward = isForward;
 				return result;
 			}
 			
 			public boolean hasPrevious() {
-                return next != null && (unboundBackwardFence || next.key != backwardFence);
+                return previous != null && (unboundBackwardFence || previous.key != backwardFence);
 			}
 			
 			protected Node KEY_VALUE_GENERIC_TYPE previousEntry() {
-				lastReturned = next;
+				lastReturned = previous;
-				Node KEY_VALUE_GENERIC_TYPE result = next;
+				next = previous;
-				next = next.previous();
+				Node KEY_VALUE_GENERIC_TYPE result = previous;
-				wasForward = false;
+				previous = movePrevious(previous);
+				wasForward = !isForward;
 				return result;
 			}
 			
 			public void remove() {
 				if(lastReturned == null) throw new IllegalStateException();
+				if(next == lastReturned) next = moveNext(next);
+				if(previous == lastReturned) previous = movePrevious(previous);
 				if(wasForward && lastReturned.needsSuccessor()) next = lastReturned;
 				map.removeNode(lastReturned);
 				lastReturned = null;
@@ -2587,19 +2632,29 @@ public class RB_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_G
 	class DescendingKeyIterator extends MapEntryIterator implements BI_ITERATOR KEY_GENERIC_TYPE
 	{
 		public DescendingKeyIterator(Node KEY_VALUE_GENERIC_TYPE first) {
-			super(first);
+			super(first, false);
+		}
+		
+		@Override
+		protected Node KEY_VALUE_GENERIC_TYPE moveNext(Node KEY_VALUE_GENERIC_TYPE node) {
+			return node.previous();
+		}
+		
+		@Override
+		protected Node KEY_VALUE_GENERIC_TYPE movePrevious(Node KEY_VALUE_GENERIC_TYPE node) {
+			return node.next();
 		}
 		
 		@Override
 		public KEY_TYPE PREVIOUS() {
 			if(!hasPrevious()) throw new NoSuchElementException();
-			return nextEntry().key;
+			return previousEntry().key;
 		}
 
 		@Override
 		public KEY_TYPE NEXT() {
 			if(!hasNext()) throw new NoSuchElementException();
-			return previousEntry().key;
+			return nextEntry().key;
 		}
 	}
 	
@@ -2607,7 +2662,7 @@ public class RB_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_G
 	{
 		public AscendingMapEntryIterator(Node KEY_VALUE_GENERIC_TYPE first)
 		{
-			super(first);
+			super(first, true);
 		}
 
 		@Override
@@ -2626,7 +2681,7 @@ public class RB_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_G
 	class AscendingValueIterator extends MapEntryIterator implements VALUE_BI_ITERATOR VALUE_GENERIC_TYPE
 	{
 		public AscendingValueIterator(Node KEY_VALUE_GENERIC_TYPE first) {
-			super(first);
+			super(first, true);
 		}
 
 		@Override
@@ -2645,7 +2700,7 @@ public class RB_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_G
 	class AscendingKeyIterator extends MapEntryIterator implements BI_ITERATOR KEY_GENERIC_TYPE
 	{
 		public AscendingKeyIterator(Node KEY_VALUE_GENERIC_TYPE first) {
-			super(first);
+			super(first, true);
 		}
 
 		@Override
@@ -2663,13 +2718,24 @@ public class RB_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_G
 	
 	abstract class MapEntryIterator
 	{
+		final boolean isForward;
 		boolean wasMoved = false;
 		Node KEY_VALUE_GENERIC_TYPE lastReturned;
 		Node KEY_VALUE_GENERIC_TYPE next;
+		Node KEY_VALUE_GENERIC_TYPE previous;
 		
-		public MapEntryIterator(Node KEY_VALUE_GENERIC_TYPE first)
+		public MapEntryIterator(Node KEY_VALUE_GENERIC_TYPE first, boolean isForward) {
-		{
 			next = first;
+			previous = first == null ? null : movePrevious(first);
+			this.isForward = isForward;
+		}
+		
+		protected Node KEY_VALUE_GENERIC_TYPE moveNext(Node KEY_VALUE_GENERIC_TYPE node) {
+			return node.next();
+		}
+		
+		protected Node KEY_VALUE_GENERIC_TYPE movePrevious(Node KEY_VALUE_GENERIC_TYPE node) {
+			return node.previous();
 		}
 		
 		public boolean hasNext() {
@@ -2678,26 +2744,30 @@ public class RB_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_G
 		
 		protected Node KEY_VALUE_GENERIC_TYPE nextEntry() {
 			lastReturned = next;
+			previous = next;
 			Node KEY_VALUE_GENERIC_TYPE result = next;
-			next = next.next();
+			next = moveNext(next);
-			wasMoved = true;
+			wasMoved = isForward;
 			return result;
 		}
 		
 		public boolean hasPrevious() {
-            return next != null;
+            return previous != null;
 		}
 		
 		protected Node KEY_VALUE_GENERIC_TYPE previousEntry() {
-			lastReturned = next;
+			lastReturned = previous;
-			Node KEY_VALUE_GENERIC_TYPE result = next;
+			next = previous;
-			next = next.previous();
+			Node KEY_VALUE_GENERIC_TYPE result = previous;
-			wasMoved = false;
+			previous = movePrevious(previous);
+			wasMoved = !isForward;
 			return result;
 		}
 		
 		public void remove() {
 			if(lastReturned == null) throw new IllegalStateException();
+			if(next == lastReturned) next = moveNext(next);
+			if(previous == lastReturned) previous = movePrevious(previous);
 			if(wasMoved && lastReturned.needsSuccessor()) next = lastReturned;
 			removeNode(lastReturned);
 			lastReturned = null;

src/builder/resources/speiger/assets/collections/templates/maps/interfaces/OrderedMap.template

@@ -1,6 +1,9 @@
 package speiger.src.collections.PACKAGE.maps.interfaces;
 
 import speiger.src.collections.PACKAGE.utils.maps.MAPS;
+#if !TYPE_OBJECT
+import speiger.src.collections.PACKAGE.sets.ORDERED_SET;
+#endif
 import speiger.src.collections.objects.collections.ObjectBidirectionalIterator;
 import speiger.src.collections.objects.sets.ObjectOrderedSet;
 /**
@@ -94,6 +97,10 @@ public interface ORDERED_MAP KEY_VALUE_GENERIC_TYPE extends MAP KEY_VALUE_GENERI
 	
 	@Override
 	public ORDERED_MAP KEY_VALUE_GENERIC_TYPE copy();
+	@Override
+	public ORDERED_SET KEY_GENERIC_TYPE keySet();
+	@Override
+	public ObjectOrderedSet<MAP.Entry KEY_VALUE_GENERIC_TYPE> ENTRY_SET();
 	
 	/**
 	 * Creates a Wrapped SortedMap that is Synchronized

src/builder/resources/speiger/assets/collections/templates/sets/AVLTreeSet.template

@@ -1298,6 +1298,7 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 		{
 			Entry KEY_GENERIC_TYPE lastReturned;
 			Entry KEY_GENERIC_TYPE next;
+			Entry KEY_GENERIC_TYPE previous;
 			boolean forwards = false;
 			boolean unboundForwardFence;
 			boolean unboundBackwardFence;
@@ -1307,6 +1308,7 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 			public AscendingSubSetIterator(Entry KEY_GENERIC_TYPE first, Entry KEY_GENERIC_TYPE forwardFence, Entry KEY_GENERIC_TYPE backwardFence)
 			{
 				next = first;
+				previous = first == null ? null : first.previous();
 				this.forwardFence = forwardFence == null ? EMPTY_KEY_VALUE : forwardFence.key;
 				this.backwardFence = backwardFence == null ? EMPTY_KEY_VALUE : backwardFence.key;
 				unboundForwardFence = forwardFence == null;
@@ -1322,6 +1324,7 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 			public KEY_TYPE NEXT() {
 				if(!hasNext()) throw new NoSuchElementException();
 				lastReturned = next;
+				previous = next;
 				KEY_TYPE result = next.key;
 				next = next.next();
 				forwards = true;
@@ -1330,15 +1333,16 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 			
 			@Override
 			public boolean hasPrevious() {
-                return next != null && (unboundBackwardFence || next.key != backwardFence);
+                return previous != null && (unboundBackwardFence || previous.key != backwardFence);
 			}
 			
 			@Override
 			public KEY_TYPE PREVIOUS() {
 				if(!hasPrevious()) throw new NoSuchElementException();
-				lastReturned = next;
+				lastReturned = previous;
-				KEY_TYPE result = next.key;
+				next = previous;
-				next = next.previous();
+				KEY_TYPE result = previous.key;
+				previous = previous.previous();
 				forwards = false;
 				return result;
 			}
@@ -1346,6 +1350,8 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 			@Override
 			public void remove() {
 				if(lastReturned == null) throw new IllegalStateException();
+				if(previous == lastReturned) previous = previous.previous();
+				if(next == lastReturned) next = next.next();
 				if(forwards && lastReturned.needsSuccessor()) next = lastReturned;
 				set.removeNode(lastReturned);
 				lastReturned = null;
@@ -1356,6 +1362,7 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 		{
 			Entry KEY_GENERIC_TYPE lastReturned;
 			Entry KEY_GENERIC_TYPE next;
+			Entry KEY_GENERIC_TYPE previous;
 			boolean forwards = false;
 			boolean unboundForwardFence;
 			boolean unboundBackwardFence;
@@ -1365,6 +1372,7 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 			public DescendingSubSetIterator(Entry KEY_GENERIC_TYPE first, Entry KEY_GENERIC_TYPE forwardFence, Entry KEY_GENERIC_TYPE backwardFence)
 			{
 				next = first;
+				previous = first == null ? null : first.next();
 				this.forwardFence = forwardFence == null ? EMPTY_KEY_VALUE : forwardFence.key;
 				this.backwardFence = backwardFence == null ? EMPTY_KEY_VALUE : backwardFence.key;
 				unboundForwardFence = forwardFence == null;
@@ -1380,6 +1388,7 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 			public KEY_TYPE NEXT() {
 				if(!hasNext()) throw new NoSuchElementException();
 				lastReturned = next;
+				previous = next;
 				KEY_TYPE result = next.key;
 				next = next.previous();
 				forwards = false;
@@ -1388,15 +1397,16 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 			
 			@Override
 			public boolean hasPrevious() {
-                return next != null && (unboundBackwardFence || next.key != backwardFence);
+                return previous != null && (unboundBackwardFence || previous.key != backwardFence);
 			}
 			
 			@Override
 			public KEY_TYPE PREVIOUS() {
 				if(!hasPrevious()) throw new NoSuchElementException();
-				lastReturned = next;
+				lastReturned = previous;
-				KEY_TYPE result = next.key;
+				next = previous;
-				next = next.next();
+				KEY_TYPE result = previous.key;
+				previous = previous.next();
 				forwards = true;
 				return result;
 			}
@@ -1404,6 +1414,8 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 			@Override
 			public void remove() {
 				if(lastReturned == null) throw new IllegalStateException();
+				if(previous == lastReturned) previous = previous.next();
+				if(next == lastReturned) next = next.previous();
 				if(forwards && lastReturned.needsSuccessor()) next = lastReturned;
 				set.removeNode(lastReturned);
 				lastReturned = null;
@@ -1415,11 +1427,13 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 	{
 		Entry KEY_GENERIC_TYPE lastReturned;
 		Entry KEY_GENERIC_TYPE next;
+		Entry KEY_GENERIC_TYPE previous;
 		boolean forwards = false;
 		
 		public AscendingSetIterator(Entry KEY_GENERIC_TYPE first)
 		{
 			next = first;
+			previous = first == null ? null : first.previous();
 		}
 		
 		@Override
@@ -1431,6 +1445,7 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 		public KEY_TYPE NEXT() {
 			if(!hasNext()) throw new NoSuchElementException();
 			lastReturned = next;
+			previous = next;
 			KEY_TYPE result = next.key;
 			next = next.next();
 			forwards = true;
@@ -1439,15 +1454,16 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 		
 		@Override
 		public boolean hasPrevious() {
-            return next != null;
+            return previous != null;
 		}
 		
 		@Override
 		public KEY_TYPE PREVIOUS() {
 			if(!hasPrevious()) throw new NoSuchElementException();
-			lastReturned = next;
+			lastReturned = previous;
-			KEY_TYPE result = next.key;
+			next = previous;
-			next = next.previous();
+			KEY_TYPE result = previous.key;
+			previous = previous.previous();
 			forwards = false;
 			return result;
 		}
@@ -1455,6 +1471,8 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 		@Override
 		public void remove() {
 			if(lastReturned == null) throw new IllegalStateException();
+			if(lastReturned == previous) previous = previous.previous();
+			if(lastReturned == next) next = next.next();
 			if(forwards && lastReturned.needsSuccessor()) next = lastReturned;
 			removeNode(lastReturned);
 			lastReturned = null;
@@ -1465,11 +1483,13 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 	{
 		Entry KEY_GENERIC_TYPE lastReturned;
 		Entry KEY_GENERIC_TYPE next;
+		Entry KEY_GENERIC_TYPE previous;
 		boolean forwards = false;
 
 		public DescendingSetIterator(Entry KEY_GENERIC_TYPE first)
 		{
 			next = first;
+			previous = first == null ? null : first.next();
 		}
 		
 		@Override
@@ -1481,6 +1501,7 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 		public KEY_TYPE NEXT() {
 			if(!hasNext()) throw new NoSuchElementException();
 			lastReturned = next;
+			previous = next;
 			KEY_TYPE result = next.key;
 			next = next.previous();
 			forwards = false;
@@ -1489,15 +1510,16 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 		
 		@Override
 		public boolean hasPrevious() {
-            return next != null;
+            return previous != null;
 		}
 		
 		@Override
 		public KEY_TYPE PREVIOUS() {
 			if(!hasPrevious()) throw new NoSuchElementException();
-			lastReturned = next;
+			lastReturned = previous;
-			KEY_TYPE result = next.key;
+			next = previous;
-			next = next.next();
+			KEY_TYPE result = previous.key;
+			previous = previous.next();
 			forwards = true;
 			return result;
 		}
@@ -1505,6 +1527,8 @@ public class AVL_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 		@Override
 		public void remove() {
 			if(lastReturned == null) throw new IllegalStateException();
+			if(lastReturned == previous) previous = previous.next();
+			if(lastReturned == next) next = next.previous();
 			if(forwards && lastReturned.needsSuccessor()) next = lastReturned;
 			removeNode(lastReturned);
 			lastReturned = null;

src/builder/resources/speiger/assets/collections/templates/sets/ArraySet.template

@@ -924,8 +924,8 @@ public class ARRAY_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE im
 		@Override
 		public KEY_TYPE PREVIOUS() {
 			if(!hasPrevious()) throw new NoSuchElementException();
-			lastReturned = index;
+			--index;
-			return data[index--];
+			return data[(lastReturned = index)];
 		}
 		
 		@Override
@@ -964,8 +964,9 @@ public class ARRAY_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE im
 		@Override
 		public int skip(int amount) {
 			if(amount < 0) throw new IllegalStateException("Negative Numbers are not allowed");
-			int steps = Math.min(amount, (size() - 1) - index);
+			int steps = Math.min(amount, size() - index);
 			index += steps;
+			if(steps > 0) lastReturned = Math.min(index-1, size()-1);
 			return steps;
 		}
 		
@@ -974,6 +975,7 @@ public class ARRAY_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE im
 			if(amount < 0) throw new IllegalStateException("Negative Numbers are not allowed");
 			int steps = Math.min(amount, index);
 			index -= steps;
+			if(steps > 0) lastReturned = Math.min(index, size()-1);
 			return steps;
 		}
 	}

src/builder/resources/speiger/assets/collections/templates/sets/ImmutableOpenHashSet.template

@@ -502,6 +502,28 @@ public class IMMUTABLE_HASH_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERI
 			}
 		}
 		
+		@Override
+		public int skip(int amount) {
+			int result = 0;
+			while(next != -1 && result != amount) {
+				current = previous = next;
+				next = (int)(links[current]);
+				result++;
+			}
+			return result;
+		}
+		
+		@Override
+		public int back(int amount) {
+			int result = 0;
+			while(previous != -1 && result != amount) {
+				current = next = previous;
+				previous = (int)(links[current] >> 32);
+				result++;
+			}
+			return result;
+		}
+		
 		@Override
 		public boolean hasNext() {
 			return next != -1;
@@ -530,9 +552,8 @@ public class IMMUTABLE_HASH_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERI
 		@Override
 		public KEY_TYPE PREVIOUS() {
 			if(!hasPrevious()) throw new NoSuchElementException();
-			current = previous;
+			current = next = previous;
 			previous = (int)(links[current] >> 32);
-			next = current;
 			if(index >= 0) index--;
 			return keys[current];
 		}
@@ -540,9 +561,8 @@ public class IMMUTABLE_HASH_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERI
 		@Override
 		public KEY_TYPE NEXT() {
 			if(!hasNext()) throw new NoSuchElementException();
-			current = next;
+			current = previous = next;
 			next = (int)(links[current]);
-			previous = current;
 			if(index >= 0) index++;
 			return keys[current];
 		}

src/builder/resources/speiger/assets/collections/templates/sets/LinkedOpenCustomHashSet.template

@@ -717,6 +717,28 @@ public class LINKED_CUSTOM_HASH_SET KEY_GENERIC_TYPE extends CUSTOM_HASH_SET KEY
 			return previous != -1;
 		}
 		
+		@Override
+		public int skip(int amount) {
+			int result = 0;
+			while(next != -1 && result != amount) {
+				current = previous = next;
+				next = (int)(links[current]);
+				result++;
+			}
+			return result;
+		}
+		
+		@Override
+		public int back(int amount) {
+			int result = 0;
+			while(previous != -1 && result != amount) {
+				current = next = previous;
+				previous = (int)(links[current] >> 32);
+				result++;
+			}
+			return result;
+		}
+		
 		@Override
 		public int nextIndex() {
 			ensureIndexKnown();
@@ -775,9 +797,8 @@ public class LINKED_CUSTOM_HASH_SET KEY_GENERIC_TYPE extends CUSTOM_HASH_SET KEY
 		@Override
 		public KEY_TYPE PREVIOUS() {
 			if(!hasPrevious()) throw new NoSuchElementException();
-			current = previous;
+			current = next = previous;
 			previous = (int)(links[current] >> 32);
-			next = current;
 			if(index >= 0) index--;
 			return keys[current];
 		}
@@ -785,9 +806,8 @@ public class LINKED_CUSTOM_HASH_SET KEY_GENERIC_TYPE extends CUSTOM_HASH_SET KEY
 		@Override
 		public KEY_TYPE NEXT() {
 			if(!hasNext()) throw new NoSuchElementException();
-			current = next;
+			current = previous = next;
 			next = (int)(links[current]);
-			previous = current;
 			if(index >= 0) index++;
 			return keys[current];
 		}

src/builder/resources/speiger/assets/collections/templates/sets/LinkedOpenHashSet.template

@@ -678,6 +678,28 @@ public class LINKED_HASH_SET KEY_GENERIC_TYPE extends HASH_SET KEY_GENERIC_TYPE
 			}
 		}
 		
+		@Override
+		public int skip(int amount) {
+			int result = 0;
+			while(next != -1 && result != amount) {
+				current = previous = next;
+				next = (int)(links[current]);
+				result++;
+			}
+			return result;
+		}
+		
+		@Override
+		public int back(int amount) {
+			int result = 0;
+			while(previous != -1 && result != amount) {
+				current = next = previous;
+				previous = (int)(links[current] >> 32);
+				result++;
+			}
+			return result;
+		}
+		
 		@Override
 		public boolean hasNext() {
 			return next != -1;
@@ -746,9 +768,8 @@ public class LINKED_HASH_SET KEY_GENERIC_TYPE extends HASH_SET KEY_GENERIC_TYPE
 		@Override
 		public KEY_TYPE PREVIOUS() {
 			if(!hasPrevious()) throw new NoSuchElementException();
-			current = previous;
+			current = next = previous;
 			previous = (int)(links[current] >> 32);
-			next = current;
 			if(index >= 0) index--;
 			return keys[current];
 		}
@@ -756,9 +777,8 @@ public class LINKED_HASH_SET KEY_GENERIC_TYPE extends HASH_SET KEY_GENERIC_TYPE
 		@Override
 		public KEY_TYPE NEXT() {
 			if(!hasNext()) throw new NoSuchElementException();
-			current = next;
+			current = previous = next;
 			next = (int)(links[current]);
-			previous = current;
 			if(index >= 0) index++;
 			return keys[current];
 		}

src/builder/resources/speiger/assets/collections/templates/sets/RBTreeSet.template

@@ -1359,6 +1359,7 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 		{
 			Entry KEY_GENERIC_TYPE lastReturned;
 			Entry KEY_GENERIC_TYPE next;
+			Entry KEY_GENERIC_TYPE previous;
 			boolean forwards = false;
 			boolean unboundForwardFence;
 			boolean unboundBackwardFence;
@@ -1368,6 +1369,7 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 			public AscendingSubSetIterator(Entry KEY_GENERIC_TYPE first, Entry KEY_GENERIC_TYPE forwardFence, Entry KEY_GENERIC_TYPE backwardFence)
 			{
 				next = first;
+				previous = first == null ? null : first.previous();
 				this.forwardFence = forwardFence == null ? EMPTY_KEY_VALUE : forwardFence.key;
 				this.backwardFence = backwardFence == null ? EMPTY_KEY_VALUE : backwardFence.key;
 				unboundForwardFence = forwardFence == null;
@@ -1383,6 +1385,7 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 			public KEY_TYPE NEXT() {
 				if(!hasNext()) throw new NoSuchElementException();
 				lastReturned = next;
+				previous = next;
 				KEY_TYPE result = next.key;
 				next = next.next();
 				forwards = true;
@@ -1391,15 +1394,16 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 			
 			@Override
 			public boolean hasPrevious() {
-                return next != null && (unboundBackwardFence || next.key != backwardFence);
+                return previous != null && (unboundBackwardFence || previous.key != backwardFence);
 			}
 			
 			@Override
 			public KEY_TYPE PREVIOUS() {
 				if(!hasPrevious()) throw new NoSuchElementException();
-				lastReturned = next;
+				lastReturned = previous;
-				KEY_TYPE result = next.key;
+				next = previous;
-				next = next.previous();
+				KEY_TYPE result = previous.key;
+				previous = previous.previous();
 				forwards = false;
 				return result;
 			}
@@ -1407,6 +1411,8 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 			@Override
 			public void remove() {
 				if(lastReturned == null) throw new IllegalStateException();
+				if(previous == lastReturned) previous = previous.previous();
+				if(next == lastReturned) next = next.next();
 				if(forwards && lastReturned.needsSuccessor()) next = lastReturned;
 				set.removeNode(lastReturned);
 				lastReturned = null;
@@ -1417,6 +1423,7 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 		{
 			Entry KEY_GENERIC_TYPE lastReturned;
 			Entry KEY_GENERIC_TYPE next;
+			Entry KEY_GENERIC_TYPE previous;
 			boolean forwards = false;
 			boolean unboundForwardFence;
 			boolean unboundBackwardFence;
@@ -1426,6 +1433,7 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 			public DescendingSubSetIterator(Entry KEY_GENERIC_TYPE first, Entry KEY_GENERIC_TYPE forwardFence, Entry KEY_GENERIC_TYPE backwardFence)
 			{
 				next = first;
+				previous = first == null ? null : first.next();
 				this.forwardFence = forwardFence == null ? EMPTY_KEY_VALUE : forwardFence.key;
 				this.backwardFence = backwardFence == null ? EMPTY_KEY_VALUE : backwardFence.key;
 				unboundForwardFence = forwardFence == null;
@@ -1441,6 +1449,7 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 			public KEY_TYPE NEXT() {
 				if(!hasNext()) throw new NoSuchElementException();
 				lastReturned = next;
+				previous = next;
 				KEY_TYPE result = next.key;
 				next = next.previous();
 				forwards = false;
@@ -1449,15 +1458,16 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 			
 			@Override
 			public boolean hasPrevious() {
-                return next != null && (unboundBackwardFence || next.key != backwardFence);
+                return previous != null && (unboundBackwardFence || previous.key != backwardFence);
 			}
 			
 			@Override
 			public KEY_TYPE PREVIOUS() {
 				if(!hasPrevious()) throw new NoSuchElementException();
-				lastReturned = next;
+				lastReturned = previous;
-				KEY_TYPE result = next.key;
+				next = previous;
-				next = next.next();
+				KEY_TYPE result = previous.key;
+				previous = previous.next();
 				forwards = true;
 				return result;
 			}
@@ -1465,6 +1475,8 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 			@Override
 			public void remove() {
 				if(lastReturned == null) throw new IllegalStateException();
+				if(previous == lastReturned) previous = previous.next();
+				if(next == lastReturned) next = next.previous();
 				if(forwards && lastReturned.needsSuccessor()) next = lastReturned;
 				set.removeNode(lastReturned);
 				lastReturned = null;
@@ -1476,11 +1488,13 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 	{
 		Entry KEY_GENERIC_TYPE lastReturned;
 		Entry KEY_GENERIC_TYPE next;
+		Entry KEY_GENERIC_TYPE previous;
 		boolean forwards = false;
 		
 		public AscendingSetIterator(Entry KEY_GENERIC_TYPE first)
 		{
 			next = first;
+			previous = first == null ? null : first.previous();
 		}
 		
 		@Override
@@ -1492,6 +1506,7 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 		public KEY_TYPE NEXT() {
 			if(!hasNext()) throw new NoSuchElementException();
 			lastReturned = next;
+			previous = next;
 			KEY_TYPE result = next.key;
 			next = next.next();
 			forwards = true;
@@ -1500,15 +1515,16 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 		
 		@Override
 		public boolean hasPrevious() {
-            return next != null;
+            return previous != null;
 		}
 		
 		@Override
 		public KEY_TYPE PREVIOUS() {
 			if(!hasPrevious()) throw new NoSuchElementException();
-			lastReturned = next;
+			lastReturned = previous;
-			KEY_TYPE result = next.key;
+			next = previous;
-			next = next.previous();
+			KEY_TYPE result = previous.key;
+			previous = previous.previous();
 			forwards = false;
 			return result;
 		}
@@ -1516,6 +1532,8 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 		@Override
 		public void remove() {
 			if(lastReturned == null) throw new IllegalStateException();
+			if(lastReturned == previous) previous = previous.previous();
+			if(lastReturned == next) next = next.next();
 			if(forwards && lastReturned.needsSuccessor()) next = lastReturned;
 			removeNode(lastReturned);
 			lastReturned = null;
@@ -1526,11 +1544,13 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 	{
 		Entry KEY_GENERIC_TYPE lastReturned;
 		Entry KEY_GENERIC_TYPE next;
+		Entry KEY_GENERIC_TYPE previous;
 		boolean forwards = false;
 
 		public DescendingSetIterator(Entry KEY_GENERIC_TYPE first)
 		{
 			next = first;
+			previous = first == null ? null : first.next();
 		}
 		
 		@Override
@@ -1542,6 +1562,7 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 		public KEY_TYPE NEXT() {
 			if(!hasNext()) throw new NoSuchElementException();
 			lastReturned = next;
+			previous = next;
 			KEY_TYPE result = next.key;
 			next = next.previous();
 			forwards = false;
@@ -1550,15 +1571,16 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 		
 		@Override
 		public boolean hasPrevious() {
-            return next != null;
+            return previous != null;
 		}
 		
 		@Override
 		public KEY_TYPE PREVIOUS() {
 			if(!hasPrevious()) throw new NoSuchElementException();
-			lastReturned = next;
+			lastReturned = previous;
-			KEY_TYPE result = next.key;
+			next = previous;
-			next = next.next();
+			KEY_TYPE result = previous.key;
+			previous = previous.next();
 			forwards = true;
 			return result;
 		}
@@ -1566,6 +1588,8 @@ public class RB_TREE_SET KEY_GENERIC_TYPE extends ABSTRACT_SET KEY_GENERIC_TYPE
 		@Override
 		public void remove() {
 			if(lastReturned == null) throw new IllegalStateException();
+			if(lastReturned == previous) previous = previous.next();
+			if(lastReturned == next) next = next.previous();
 			if(forwards && lastReturned.needsSuccessor()) next = lastReturned;
 			removeNode(lastReturned);
 			lastReturned = null;

src/builder/resources/speiger/assets/collections/templates/utils/maps/Maps.template

@@ -19,8 +19,11 @@ import speiger.src.collections.objects.collections.ObjectIterable;
 import speiger.src.collections.objects.collections.ObjectIterator;
 import speiger.src.collections.objects.sets.ObjectSet;
 #if !TYPE_BOOLEAN
+import speiger.src.collections.objects.collections.ObjectBidirectionalIterator;
+import speiger.src.collections.objects.utils.ObjectIterators;
 import speiger.src.collections.objects.utils.ObjectSets;
 #if !TYPE_OBJECT
+import speiger.src.collections.objects.sets.ObjectOrderedSet;
 import speiger.src.collections.PACKAGE.functions.COMPARATOR;
 #endif
 import speiger.src.collections.PACKAGE.functions.consumer.BI_CONSUMER;
@@ -35,6 +38,7 @@ import speiger.src.collections.PACKAGE.maps.interfaces.SORTED_MAP;
 import speiger.src.collections.PACKAGE.maps.interfaces.ORDERED_MAP;
 import speiger.src.collections.PACKAGE.sets.NAVIGABLE_SET;
 import speiger.src.collections.PACKAGE.sets.SORTED_SET;
+import speiger.src.collections.PACKAGE.sets.ORDERED_SET;
 #if !TYPE_OBJECT
 import speiger.src.collections.PACKAGE.sets.SET;
 import speiger.src.collections.PACKAGE.utils.SETS;
@@ -520,17 +524,28 @@ public class MAPS
 		@Override
 		public KEY_TYPE FIRST_ENTRY_KEY() { return map.FIRST_ENTRY_KEY(); }
 		@Override
-		public KEY_TYPE POLL_FIRST_ENTRY_KEY() { return map.POLL_FIRST_ENTRY_KEY(); }
+		public KEY_TYPE POLL_FIRST_ENTRY_KEY() { throw new UnsupportedOperationException(); }
 		@Override
 		public KEY_TYPE LAST_ENTRY_KEY() { return map.LAST_ENTRY_KEY(); }
 		@Override
-		public KEY_TYPE POLL_LAST_ENTRY_KEY() { return map.POLL_LAST_ENTRY_KEY(); }
+		public KEY_TYPE POLL_LAST_ENTRY_KEY() { throw new UnsupportedOperationException(); }
 		@Override
 		public VALUE_TYPE FIRST_ENTRY_VALUE() { return map.FIRST_ENTRY_VALUE(); }
 		@Override
 		public VALUE_TYPE LAST_ENTRY_VALUE() { return map.LAST_ENTRY_VALUE(); }
 		@Override
 		public ORDERED_MAP KEY_VALUE_GENERIC_TYPE copy() { return map.copy(); }
+		@Override
+		public ORDERED_SET KEY_GENERIC_TYPE keySet() { 
+			if(keys == null) keys = SETS.unmodifiable(map.keySet()); 
+			return (ORDERED_SET KEY_GENERIC_TYPE)keys;
+		}
+				
+		@Override
+		public ObjectOrderedSet<MAP.Entry KEY_VALUE_GENERIC_TYPE> ENTRY_SET() {
+			if(entrySet == null) entrySet = new UnmodifyableOrderedEntrySetKV_BRACES(map.ENTRY_SET());
+			return (ObjectOrderedSet<MAP.Entry KEY_VALUE_GENERIC_TYPE>)entrySet;
+		}
 	}
 	
 	/**
@@ -556,15 +571,14 @@ public class MAPS
 		public SORTED_MAP KEY_VALUE_GENERIC_TYPE tailMap(KEY_TYPE fromKey) { return MAPS.unmodifiable(map.tailMap(fromKey)); }
 		@Override
 		public SORTED_SET KEY_GENERIC_TYPE keySet() { return SETS.unmodifiable(map.keySet()); }
-
 		@Override
 		public KEY_TYPE FIRST_ENTRY_KEY() { return map.FIRST_ENTRY_KEY(); }
 		@Override
-		public KEY_TYPE POLL_FIRST_ENTRY_KEY() { return map.POLL_FIRST_ENTRY_KEY(); }
+		public KEY_TYPE POLL_FIRST_ENTRY_KEY() { throw new UnsupportedOperationException(); }
 		@Override
 		public KEY_TYPE LAST_ENTRY_KEY() { return map.LAST_ENTRY_KEY(); }
 		@Override
-		public KEY_TYPE POLL_LAST_ENTRY_KEY() { return map.POLL_LAST_ENTRY_KEY(); }
+		public KEY_TYPE POLL_LAST_ENTRY_KEY() { throw new UnsupportedOperationException(); }
 		@Override
 		public VALUE_TYPE FIRST_ENTRY_VALUE() { return map.FIRST_ENTRY_VALUE(); }
 		@Override
@@ -628,6 +642,10 @@ public class MAPS
 		@Override
 		public void BULK_MERGE(MAP KEY_VALUE_GENERIC_TYPE m, VALUE_UNARY_OPERATOR VALUE_VALUE_GENERIC_TYPE mappingFunction) { throw new UnsupportedOperationException(); }
 		@Override
+		public void REPLACE_VALUES(UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) { throw new UnsupportedOperationException(); }
+		@Override
+		public void REPLACE_VALUES(MAP KEY_VALUE_GENERIC_TYPE m) { throw new UnsupportedOperationException(); }
+		@Override
 		public MAP KEY_VALUE_GENERIC_TYPE copy() { return map.copy(); }
 		@Override
 		public void clear() { throw new UnsupportedOperationException(); }
@@ -651,6 +669,45 @@ public class MAPS
 		}
 	}
 	
+	
+	/**
+	 * The Unmodifyable Ordered Set implementation for the Unmodifyable Ordered Map implementation
+	 * @Type(T)
+	 * @ValueType(V)
+	 */
+	public static class UnmodifyableOrderedEntrySet KEY_VALUE_GENERIC_TYPE extends UnmodifyableEntrySet KEY_VALUE_GENERIC_TYPE implements ObjectOrderedSet<MAP.Entry KEY_VALUE_GENERIC_TYPE>
+	{
+		ObjectOrderedSet<MAP.Entry KEY_VALUE_GENERIC_TYPE> set;
+		
+		UnmodifyableOrderedEntrySet(ObjectOrderedSet<MAP.Entry KEY_VALUE_GENERIC_TYPE> c) {
+			super(c);
+			set = c;
+		}
+
+		@Override
+		public boolean addAndMoveToFirst(MAP.Entry KEY_VALUE_GENERIC_TYPE o) { throw new UnsupportedOperationException(); }
+		@Override
+		public boolean addAndMoveToLast(MAP.Entry KEY_VALUE_GENERIC_TYPE o) { throw new UnsupportedOperationException(); }
+		@Override
+		public boolean moveToFirst(MAP.Entry KEY_VALUE_GENERIC_TYPE o) { throw new UnsupportedOperationException(); }
+		@Override
+		public boolean moveToLast(MAP.Entry KEY_VALUE_GENERIC_TYPE o) { throw new UnsupportedOperationException(); }
+		@Override
+		public ObjectOrderedSet<MAP.Entry KEY_VALUE_GENERIC_TYPE> copy() { return set.copy(); }
+		@Override
+		public ObjectBidirectionalIterator<MAP.Entry KEY_VALUE_GENERIC_TYPE> iterator() { return ObjectIterators.unmodifiable(set.iterator()); }
+		@Override
+		public ObjectBidirectionalIterator<MAP.Entry KEY_VALUE_GENERIC_TYPE> iterator(MAP.Entry KEY_VALUE_GENERIC_TYPE fromElement) { return ObjectIterators.unmodifiable(set.iterator(fromElement)); }
+		@Override
+		public MAP.Entry KEY_VALUE_GENERIC_TYPE first() { return set.first(); }
+		@Override
+		public MAP.Entry KEY_VALUE_GENERIC_TYPE pollFirst() { throw new UnsupportedOperationException(); }
+		@Override
+		public MAP.Entry KEY_VALUE_GENERIC_TYPE last() { return set.last(); }
+		@Override
+		public MAP.Entry KEY_VALUE_GENERIC_TYPE pollLast() { throw new UnsupportedOperationException(); }
+	}
+	
 	/**
 	 * The Unmodifyable Set implementation for the Unmodifyable Map implementation
 	 * @Type(T)
@@ -846,6 +903,17 @@ public class MAPS
 		public VALUE_TYPE LAST_ENTRY_VALUE() { synchronized(mutex) { return map.LAST_ENTRY_VALUE(); } }
 		@Override
 		public ORDERED_MAP KEY_VALUE_GENERIC_TYPE copy() { synchronized(mutex) { return map.copy(); } }
+		@Override
+		public ORDERED_SET KEY_GENERIC_TYPE keySet() {
+			if(keys == null) keys = SETS.synchronize(map.keySet(), mutex);
+			return (ORDERED_SET KEY_GENERIC_TYPE)keys;
+		}
+		
+		@Override
+		public ObjectOrderedSet<MAP.Entry KEY_VALUE_GENERIC_TYPE> ENTRY_SET() {
+			if(entrySet == null) entrySet = ObjectSets.synchronize(map.ENTRY_SET(), mutex);
+			return (ObjectOrderedSet<MAP.Entry KEY_VALUE_GENERIC_TYPE>)entrySet;
+		}
 	}
 	
 	/**