Finished Code Cleanup with Compute functions and added ReversedWrappers

Changelog.md

@@ -5,7 +5,9 @@
 - Added: Dedicated Set toArray implementations.
 - Added: ToArray/pushTop functions to Stack.class.
 - Added: ComputeNonDefault functions which will contain the current behavior of the Compute function, while the Compute will be changed to be more java compliant!
+- Added: List.reversed, which returns a SubList that has all elements in reversed order and also inserts reversed.
 - Fixed: SetValue wasn't working on forEach implementations.
+- Fixed: Compute functions now perform with primitives more java compliant. Meaning that getDefaultReturnValue function no longer is seen as null.
 
 ### Version 0.8.0
 - Added: getFirst/getLast/removeFirst/removeLast to Lists

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

@@ -1,10 +1,12 @@
 package speiger.src.collections.PACKAGE.lists;
 
 import java.util.Collection;
+import java.util.Iterator;
 import java.util.List;
 import java.util.ListIterator;
 import java.util.NoSuchElementException;
 import java.util.Objects;
+import java.util.RandomAccess;
 
 import speiger.src.collections.PACKAGE.collections.ABSTRACT_COLLECTION;
 import speiger.src.collections.PACKAGE.collections.COLLECTION;
@@ -66,8 +68,7 @@ public abstract class ABSTRACT_LIST KEY_GENERIC_TYPE extends ABSTRACT_COLLECTION
 	 */
 	@Override
 	@Deprecated
-	public boolean addAll(Collection<? extends CLASS_TYPE> c)
-	{
+	public boolean addAll(Collection<? extends CLASS_TYPE> c) {
 		return c instanceof COLLECTION ? addAll((COLLECTION KEY_GENERIC_TYPE)c) : addAll(size(), c);
 	}
 	
@@ -221,6 +222,11 @@ public abstract class ABSTRACT_LIST KEY_GENERIC_TYPE extends ABSTRACT_COLLECTION
 		return new SubList(this, 0, fromIndex, toIndex);
 	}
 	
+	@Override
+	public LIST KEY_GENERIC_TYPE reversed() {
+		return new ReversedList(this);
+	}
+	
 	@Override
 	public ITERATOR KEY_GENERIC_TYPE iterator() {
 		return listIterator(0);
@@ -245,6 +251,138 @@ public abstract class ABSTRACT_LIST KEY_GENERIC_TYPE extends ABSTRACT_COLLECTION
 	
 	public ABSTRACT_LIST KEY_GENERIC_TYPE copy() { throw new UnsupportedOperationException(); }
 	
+	private class ReversedList extends ABSTRACT_LIST KEY_GENERIC_TYPE
+	{
+		final ABSTRACT_LIST KEY_GENERIC_TYPE list;
+		
+		public ReversedList(ABSTRACT_LIST KEY_GENERIC_TYPE list) {
+			this.list = list;
+		}
+
+		@Override
+		public void add(int index, KEY_TYPE e) {
+			list.add(list.size() - index - 1, e);
+		}
+		
+		@Override
+		public boolean addAll(int index, COLLECTION KEY_GENERIC_TYPE c) {
+			return addCollection(index, c);
+		}
+		
+		@Override
+		public boolean addAll(int index, LIST KEY_GENERIC_TYPE c) {
+			if(c instanceof RandomAccess) {
+				for(int i = 0,m=c.size();i<m;i++) {
+					list.add(list.size() - index - i - 1, c.GET_KEY(i));
+				}
+				return true;
+			}
+			return addCollection(index, c);
+		}
+		
+		private boolean addCollection(int index, COLLECTION KEY_GENERIC_TYPE c) {
+			int i = 0;
+			for(ITERATOR KEY_GENERIC_TYPE iter = c.iterator();iter.hasNext();i++) {
+				list.add(list.size() - index - i - 1, iter.NEXT());
+			}
+			return true;
+		}
+		
+		@Override
+		public boolean addAll(int index, Collection<? extends CLASS_TYPE> c) {
+			int i = 0;
+			for(Iterator<? extends CLASS_TYPE> iter = c.iterator();iter.hasNext();i++) {
+				list.add(list.size() - index - i - 1, iter.next());
+			}
+			return true;
+		}
+		
+		@Override
+		public KEY_TYPE GET_KEY(int index) {
+			return list.GET_KEY(list.size() - index - 1);
+		}
+
+		@Override
+		public KEY_TYPE set(int index, KEY_TYPE e) {
+			return list.set(list.size() - index - 1, e);
+		}
+
+		@Override
+		public KEY_TYPE REMOVE(int index) {
+			return list.REMOVE(list.size() - index - 1);
+		}
+		
+		@Override
+		public void addElements(int from, KEY_TYPE[] a, int offset, int length) {
+			for(int i = 0,m=length;i<m;i++) {
+				list.add(list.size() - from - i - 1, a[i+offset]);
+			}
+		}
+		
+		@Override
+		public KEY_TYPE[] getElements(int from, KEY_TYPE[] a, int offset, int length) {
+			return reverse(list.getElements(list.size() - from - 1, a, offset, length));
+		}
+
+		@Override
+		public void removeElements(int from, int to) {
+			list.removeElements(list.size() - to - 1, list.size() - from - 1);
+		}
+
+		@Override
+		public KEY_TYPE swapRemove(int index) {
+			return list.swapRemove(list.size() - index - 1);
+		}
+#if TYPE_OBJECT
+		@Override
+		public <K> K[] extractElements(int from, int to, Class<K> type) {
+			return reverse(list.extractElements(list.size() - to - 1, list.size() - from - 1, type));
+		}
+		
+#else
+		@Override
+		public KEY_TYPE[] extractElements(int from, int to) {
+			return reverse(list.extractElements(list.size() - to - 1, list.size() - from - 1));
+		}
+		
+#endif
+		@Override
+		public int size() {
+			return list.size();
+		}
+		
+		@Override
+		public void clear() {
+			list.clear();
+		}
+		
+		@Override
+		public LIST KEY_GENERIC_TYPE reversed() {
+			return list;
+		}
+		
+#if TYPE_OBJECT
+		private <K> K[] reverse(K[] data) {
+			for (int i = 0, mid = data.length >> 1, j = data.length - 1; i < mid; i++, j--) {
+				K t = data[i];
+				data[i] = data[j];
+				data[j] = t;
+			}
+			return data;
+		}
+#else
+		private KEY_TYPE[] reverse(KEY_TYPE[] data) {
+			for (int i = 0, mid = data.length >> 1, j = data.length - 1; i < mid; i++, j--) {
+				KEY_TYPE t = data[i];
+				data[i] = data[j];
+				data[j] = t;
+			}
+			return data;
+		}
+	
+#endif
+	}
+	
 	private class SubList extends ABSTRACT_LIST KEY_GENERIC_TYPE
 	{
 		final ABSTRACT_LIST KEY_GENERIC_TYPE list;

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

@@ -432,6 +432,12 @@ public interface LIST KEY_GENERIC_TYPE extends COLLECTION KEY_GENERIC_TYPE, List
 	@Override
 	public LIST KEY_GENERIC_TYPE subList(int from, int to);
 	
+	/**
+	 * A Type-Specific List Helper that shows all elements in reverse.
+	 * @return a list wrapper that has all elements reversed!
+	 */
+	public LIST KEY_GENERIC_TYPE reversed();
+	
 #if LISTS_FEATURE
 	/**
 	 * Creates a Wrapped List that is Synchronized

src/builder/resources/speiger/assets/collections/templates/maps/impl/concurrent/ConcurrentOpenHashMap.template

@@ -518,6 +518,13 @@ public class CONCURRENT_HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY
 		return getSegment(hash).compute(hash, key, mappingFunction);
 	}
 	
+	@Override
+	public VALUE_TYPE COMPUTENonDefault(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		Objects.requireNonNull(mappingFunction);
+		int hash = getHashCode(key);
+		return getSegment(hash).computeNonDefault(hash, key, mappingFunction);
+	}
+
 	@Override
 	public VALUE_TYPE COMPUTE_IF_ABSENT(KEY_TYPE key, FUNCTION KEY_VALUE_GENERIC_TYPE mappingFunction) {
 		Objects.requireNonNull(mappingFunction);
@@ -525,6 +532,13 @@ public class CONCURRENT_HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY
 		return getSegment(hash).computeIfAbsent(hash, key, mappingFunction);
 	}
 	
+	@Override
+	public VALUE_TYPE COMPUTE_IF_ABSENTNonDefault(KEY_TYPE key, FUNCTION KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		Objects.requireNonNull(mappingFunction);
+		int hash = getHashCode(key);
+		return getSegment(hash).computeIfAbsentNonDefault(hash, key, mappingFunction);
+	}
+
 	@Override
 	public VALUE_TYPE SUPPLY_IF_ABSENT(KEY_TYPE key, VALUE_SUPPLIER VALUE_GENERIC_TYPE valueProvider) {
 		Objects.requireNonNull(valueProvider);
@@ -532,6 +546,13 @@ public class CONCURRENT_HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY
 		return getSegment(hash).supplyIfAbsent(hash, key, valueProvider);
 	}
 	
+	@Override
+	public VALUE_TYPE SUPPLY_IF_ABSENTNonDefault(KEY_TYPE key, VALUE_SUPPLIER VALUE_GENERIC_TYPE valueProvider) {
+		Objects.requireNonNull(valueProvider);
+		int hash = getHashCode(key);
+		return getSegment(hash).supplyIfAbsentNonDefault(hash, key, valueProvider);
+	}
+	
 	@Override
 	public VALUE_TYPE COMPUTE_IF_PRESENT(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
 		Objects.requireNonNull(mappingFunction);
@@ -539,6 +560,13 @@ public class CONCURRENT_HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY
 		return getSegment(hash).computeIfPresent(hash, key, mappingFunction);
 	}
 	
+	@Override
+	public VALUE_TYPE COMPUTE_IF_PRESENTNonDefault(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		Objects.requireNonNull(mappingFunction);
+		int hash = getHashCode(key);
+		return getSegment(hash).computeIfPresentNonDefault(hash, key, mappingFunction);
+	}
+	
 	@Override
 	public VALUE_TYPE MERGE(KEY_TYPE key, VALUE_TYPE value, VALUE_UNARY_OPERATOR VALUE_VALUE_GENERIC_TYPE mappingFunction) {
 		Objects.requireNonNull(mappingFunction);
@@ -2193,6 +2221,33 @@ public class CONCURRENT_HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY
 				int index = findIndex(hash, key);
 				if(index < 0) {
 					VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, getDefaultReturnValue());
+#if VALUE_OBJECT
+					if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+					insert(-index-1, key, newValue);
+					return newValue;
+				}
+				VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, values[index]);
+#if VALUE_OBJECT
+				if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+					removeIndex(index);
+					return newValue;
+				}
+#endif
+				values[index] = newValue;
+				return newValue;
+			}
+			finally {
+				unlockWrite(stamp);
+			}
+		}
+		
+		protected VALUE_TYPE computeNonDefault(int hash, KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
+			long stamp = writeLock();
+			try {
+				int index = findIndex(hash, key);
+				if(index < 0) {
+					VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, getDefaultReturnValue());
 					if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
 					insert(-index-1, key, newValue);
 					return newValue;
@@ -2216,6 +2271,33 @@ public class CONCURRENT_HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY
 				int index = findIndex(hash, key);
 				if(index < 0) {
 					VALUE_TYPE newValue = mappingFunction.APPLY(key);
+#if VALUE_OBJECT
+					if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+					insert(-index-1, key, newValue);
+					return newValue;
+				}
+				VALUE_TYPE newValue = values[index];
+#if VALUE_OBJECT
+				if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+					newValue = mappingFunction.APPLY(key);
+					if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+					values[index] = newValue;
+				}
+#endif
+				return newValue;
+			}
+			finally {
+				unlockWrite(stamp);
+			}
+		}
+		
+		protected VALUE_TYPE computeIfAbsentNonDefault(int hash, KEY_TYPE key, FUNCTION KEY_VALUE_GENERIC_TYPE mappingFunction) {
+			long stamp = writeLock();
+			try {
+				int index = findIndex(hash, key);
+				if(index < 0) {
+					VALUE_TYPE newValue = mappingFunction.APPLY(key);
 					if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
 					insert(-index-1, key, newValue);
 					return newValue;
@@ -2239,6 +2321,33 @@ public class CONCURRENT_HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY
 				int index = findIndex(hash, key);
 				if(index < 0) {
 					VALUE_TYPE newValue = valueProvider.VALUE_SUPPLY_GET();
+#if VALUE_OBJECT
+					if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+					insert(-index-1, key, newValue);
+					return newValue;
+				}
+				VALUE_TYPE newValue = values[index];
+#if VALUE_OBJECT
+				if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+					newValue = valueProvider.VALUE_SUPPLY_GET();
+					if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+					values[index] = newValue;
+				}
+#endif
+				return newValue;
+			}
+			finally {
+				unlockWrite(stamp);
+			}
+		}
+		
+		protected VALUE_TYPE supplyIfAbsentNonDefault(int hash, KEY_TYPE key, VALUE_SUPPLIER VALUE_GENERIC_TYPE valueProvider) {
+			long stamp = writeLock();
+			try {
+				int index = findIndex(hash, key);
+				if(index < 0) {
+					VALUE_TYPE newValue = valueProvider.VALUE_SUPPLY_GET();
 					if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
 					insert(-index-1, key, newValue);
 					return newValue;
@@ -2260,6 +2369,29 @@ public class CONCURRENT_HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY
 			long stamp = writeLock();
 			try {
 				int index = findIndex(hash, key);
+#if !VALUE_OBJECT
+				if(index < 0) return getDefaultReturnValue();
+				VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, values[index]);
+#else
+				if(index < 0 || VALUE_EQUALS(values[index], getDefaultReturnValue())) return getDefaultReturnValue();
+				VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, values[index]);
+				if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+					removeIndex(index);
+					return newValue;
+				}
+#endif
+				values[index] = newValue;
+				return newValue;
+			}
+			finally {
+				unlockWrite(stamp);
+			}
+		}
+		
+		protected VALUE_TYPE computeIfPresentNonDefault(int hash, KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
+			long stamp = writeLock();
+			try {
+				int index = findIndex(hash, key);
 				if(index < 0 || VALUE_EQUALS(values[index], getDefaultReturnValue())) return getDefaultReturnValue();
 				VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, values[index]);
 				if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {

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

@@ -537,6 +537,29 @@ public class CUSTOM_HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VAL
 		int index = findIndex(key);
 		if(index < 0) {
 			VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, getDefaultReturnValue());
+#if VALUE_OBJECT
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+			insert(-index-1, key, newValue);
+			return newValue;
+		}
+		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, values[index]);
+#if VALUE_OBJECT
+		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+			removeIndex(index);
+			return newValue;
+		}
+#endif
+		values[index] = newValue;
+		return newValue;
+	}
+	
+	@Override
+	public VALUE_TYPE COMPUTENonDefault(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		Objects.requireNonNull(mappingFunction);
+		int index = findIndex(key);
+		if(index < 0) {
+			VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, getDefaultReturnValue());
 			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
 			insert(-index-1, key, newValue);
 			return newValue;
@@ -556,6 +579,29 @@ public class CUSTOM_HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VAL
 		int index = findIndex(key);
 		if(index < 0) {
 			VALUE_TYPE newValue = mappingFunction.APPLY(key);
+#if VALUE_OBJECT
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+			insert(-index-1, key, newValue);
+			return newValue;
+		}
+		VALUE_TYPE newValue = values[index];
+#if VALUE_OBJECT
+		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+			newValue = mappingFunction.APPLY(key);
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+			values[index] = newValue;
+		}
+#endif
+		return newValue;
+	}
+	
+	@Override
+	public VALUE_TYPE COMPUTE_IF_ABSENTNonDefault(KEY_TYPE key, FUNCTION KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		Objects.requireNonNull(mappingFunction);
+		int index = findIndex(key);
+		if(index < 0) {
+			VALUE_TYPE newValue = mappingFunction.APPLY(key);
 			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
 			insert(-index-1, key, newValue);
 			return newValue;
@@ -575,6 +621,29 @@ public class CUSTOM_HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VAL
 		int index = findIndex(key);
 		if(index < 0) {
 			VALUE_TYPE newValue = valueProvider.VALUE_SUPPLY_GET();
+#if VALUE_OBJECT
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+			insert(-index-1, key, newValue);
+			return newValue;
+		}
+		VALUE_TYPE newValue = values[index];
+#if VALUE_OBJECT
+		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+			newValue = valueProvider.VALUE_SUPPLY_GET();
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+			values[index] = newValue;
+		}
+#endif
+		return newValue;
+	}
+	
+	@Override
+	public VALUE_TYPE SUPPLY_IF_ABSENTNonDefault(KEY_TYPE key, VALUE_SUPPLIER VALUE_GENERIC_TYPE valueProvider) {
+		Objects.requireNonNull(valueProvider);
+		int index = findIndex(key);
+		if(index < 0) {
+			VALUE_TYPE newValue = valueProvider.VALUE_SUPPLY_GET();
 			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
 			insert(-index-1, key, newValue);
 			return newValue;
@@ -592,6 +661,25 @@ public class CUSTOM_HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VAL
 	public VALUE_TYPE COMPUTE_IF_PRESENT(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
 		Objects.requireNonNull(mappingFunction);
 		int index = findIndex(key);
+#if !VALUE_OBJECT
+		if(index < 0) return getDefaultReturnValue();
+		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, values[index]);
+#else
+		if(index < 0 || VALUE_EQUALS(values[index], getDefaultReturnValue())) return getDefaultReturnValue();
+		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, values[index]);
+		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+			removeIndex(index);
+			return newValue;
+		}
+#endif
+		values[index] = newValue;
+		return newValue;
+	}
+	
+	@Override
+	public VALUE_TYPE COMPUTE_IF_PRESENTNonDefault(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		Objects.requireNonNull(mappingFunction);
+		int index = findIndex(key);
 		if(index < 0 || VALUE_EQUALS(values[index], getDefaultReturnValue())) return getDefaultReturnValue();
 		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, values[index]);
 		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {

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

@@ -497,6 +497,29 @@ public class HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_GENE
 		int index = findIndex(key);
 		if(index < 0) {
 			VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, getDefaultReturnValue());
+#if VALUE_OBJECT
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+			insert(-index-1, key, newValue);
+			return newValue;
+		}
+		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, values[index]);
+#if VALUE_OBJECT
+		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+			removeIndex(index);
+			return newValue;
+		}
+#endif
+		values[index] = newValue;
+		return newValue;
+	}
+	
+	@Override
+	public VALUE_TYPE COMPUTENonDefault(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		Objects.requireNonNull(mappingFunction);
+		int index = findIndex(key);
+		if(index < 0) {
+			VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, getDefaultReturnValue());
 			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
 			insert(-index-1, key, newValue);
 			return newValue;
@@ -516,6 +539,29 @@ public class HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_GENE
 		int index = findIndex(key);
 		if(index < 0) {
 			VALUE_TYPE newValue = mappingFunction.APPLY(key);
+#if VALUE_OBJECT
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+			insert(-index-1, key, newValue);
+			return newValue;
+		}
+		VALUE_TYPE newValue = values[index];
+#if VALUE_OBJECT
+		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+			newValue = mappingFunction.APPLY(key);
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+			values[index] = newValue;
+		}
+#endif
+		return newValue;
+	}
+	
+	@Override
+	public VALUE_TYPE COMPUTE_IF_ABSENTNonDefault(KEY_TYPE key, FUNCTION KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		Objects.requireNonNull(mappingFunction);
+		int index = findIndex(key);
+		if(index < 0) {
+			VALUE_TYPE newValue = mappingFunction.APPLY(key);
 			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
 			insert(-index-1, key, newValue);
 			return newValue;
@@ -535,6 +581,29 @@ public class HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_GENE
 		int index = findIndex(key);
 		if(index < 0) {
 			VALUE_TYPE newValue = valueProvider.VALUE_SUPPLY_GET();
+#if VALUE_OBJECT
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+			insert(-index-1, key, newValue);
+			return newValue;
+		}
+		VALUE_TYPE newValue = values[index];
+#if VALUE_OBJECT
+		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+			newValue = valueProvider.VALUE_SUPPLY_GET();
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+			values[index] = newValue;
+		}
+#endif
+		return newValue;
+	}
+	
+	@Override
+	public VALUE_TYPE SUPPLY_IF_ABSENTNonDefault(KEY_TYPE key, VALUE_SUPPLIER VALUE_GENERIC_TYPE valueProvider) {
+		Objects.requireNonNull(valueProvider);
+		int index = findIndex(key);
+		if(index < 0) {
+			VALUE_TYPE newValue = valueProvider.VALUE_SUPPLY_GET();
 			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
 			insert(-index-1, key, newValue);
 			return newValue;
@@ -552,6 +621,25 @@ public class HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_GENE
 	public VALUE_TYPE COMPUTE_IF_PRESENT(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
 		Objects.requireNonNull(mappingFunction);
 		int index = findIndex(key);
+#if !VALUE_OBJECT
+		if(index < 0) return getDefaultReturnValue();
+		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, values[index]);
+#else
+		if(index < 0 || VALUE_EQUALS(values[index], getDefaultReturnValue())) return getDefaultReturnValue();
+		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, values[index]);
+		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+			removeIndex(index);
+			return newValue;
+		}
+#endif
+		values[index] = newValue;
+		return newValue;
+	}
+	
+	@Override
+	public VALUE_TYPE COMPUTE_IF_PRESENTNonDefault(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		Objects.requireNonNull(mappingFunction);
+		int index = findIndex(key);
 		if(index < 0 || VALUE_EQUALS(values[index], getDefaultReturnValue())) return getDefaultReturnValue();
 		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, values[index]);
 		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {

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

@@ -493,15 +493,20 @@ public class IMMUTABLE_HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_
 	
 	@Override
 	public VALUE_TYPE COMPUTE(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) { throw new UnsupportedOperationException(); }
-	
+	@Override
+	public VALUE_TYPE COMPUTENonDefault(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) { throw new UnsupportedOperationException(); }
 	@Override
 	public VALUE_TYPE COMPUTE_IF_ABSENT(KEY_TYPE key, FUNCTION KEY_VALUE_GENERIC_TYPE mappingFunction) { throw new UnsupportedOperationException(); }
-	
+	@Override
+	public VALUE_TYPE COMPUTE_IF_ABSENTNonDefault(KEY_TYPE key, FUNCTION KEY_VALUE_GENERIC_TYPE mappingFunction) { throw new UnsupportedOperationException(); }
 	@Override
 	public VALUE_TYPE SUPPLY_IF_ABSENT(KEY_TYPE key, VALUE_SUPPLIER VALUE_GENERIC_TYPE valueProvider) { throw new UnsupportedOperationException(); }
-	
+	@Override
+	public VALUE_TYPE SUPPLY_IF_ABSENTNonDefault(KEY_TYPE key, VALUE_SUPPLIER VALUE_GENERIC_TYPE valueProvider) { throw new UnsupportedOperationException(); }
 	@Override
 	public VALUE_TYPE COMPUTE_IF_PRESENT(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) { throw new UnsupportedOperationException(); }
+	@Override
+	public VALUE_TYPE COMPUTE_IF_PRESENTNonDefault(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) { throw new UnsupportedOperationException(); }
 	
 	@Override
 	public VALUE_TYPE MERGE(KEY_TYPE key, VALUE_TYPE value, VALUE_UNARY_OPERATOR VALUE_VALUE_GENERIC_TYPE mappingFunction) { throw new UnsupportedOperationException(); }

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

@@ -495,6 +495,29 @@ public class ARRAY_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_GEN
 		int index = findIndex(key);
 		if(index == -1) {
 			VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, getDefaultReturnValue());
+#if VALUE_OBJECT
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+			insertIndex(size++, key, newValue);
+			return newValue;
+		}
+		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, values[index]);
+#if VALUE_OBJECT
+		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+			removeIndex(index);
+			return newValue;
+		}
+#endif
+		values[index] = newValue;
+		return newValue;
+	}
+	
+	@Override
+	public VALUE_TYPE COMPUTENonDefault(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		Objects.requireNonNull(mappingFunction);
+		int index = findIndex(key);
+		if(index == -1) {
+			VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, getDefaultReturnValue());
 			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
 			insertIndex(size++, key, newValue);
 			return newValue;
@@ -514,6 +537,29 @@ public class ARRAY_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_GEN
 		int index = findIndex(key);
 		if(index == -1) {
 			VALUE_TYPE newValue = mappingFunction.APPLY(key);
+#if VALUE_OBJECT
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+			insertIndex(size++, key, newValue);
+			return newValue;
+		}
+		VALUE_TYPE newValue = values[index];
+#if VALUE_OBJECT
+		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+			newValue = mappingFunction.APPLY(key);
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+			values[index] = newValue;
+		}
+#endif
+		return newValue;
+	}
+	
+	@Override
+	public VALUE_TYPE COMPUTE_IF_ABSENTNonDefault(KEY_TYPE key, FUNCTION KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		Objects.requireNonNull(mappingFunction);
+		int index = findIndex(key);
+		if(index == -1) {
+			VALUE_TYPE newValue = mappingFunction.APPLY(key);
 			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
 			insertIndex(size++, key, newValue);
 			return newValue;
@@ -533,6 +579,29 @@ public class ARRAY_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_GEN
 		int index = findIndex(key);
 		if(index == -1) {
 			VALUE_TYPE newValue = valueProvider.VALUE_SUPPLY_GET();
+#if VALUE_OBJECT
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+			insertIndex(size++, key, newValue);
+			return newValue;
+		}
+		VALUE_TYPE newValue = values[index];
+#if VALUE_OBJECT
+		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+			newValue = valueProvider.VALUE_SUPPLY_GET();
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+			values[index] = newValue;
+		}
+#endif
+		return newValue;
+	}
+	
+	@Override
+	public VALUE_TYPE SUPPLY_IF_ABSENTNonDefault(KEY_TYPE key, VALUE_SUPPLIER VALUE_GENERIC_TYPE valueProvider) {
+		Objects.requireNonNull(valueProvider);
+		int index = findIndex(key);
+		if(index == -1) {
+			VALUE_TYPE newValue = valueProvider.VALUE_SUPPLY_GET();
 			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
 			insertIndex(size++, key, newValue);
 			return newValue;
@@ -550,6 +619,25 @@ public class ARRAY_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_GEN
 	public VALUE_TYPE COMPUTE_IF_PRESENT(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
 		Objects.requireNonNull(mappingFunction);
 		int index = findIndex(key);
+#if !VALUE_OBJECT
+		if(index == -1) return getDefaultReturnValue();
+		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, values[index]);
+#else
+		if(index == -1 || VALUE_EQUALS(values[index], getDefaultReturnValue())) return getDefaultReturnValue();
+		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, values[index]);
+		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+			removeIndex(index);
+			return newValue;
+		}
+#endif
+		values[index] = newValue;
+		return newValue;
+	}
+	
+	@Override
+	public VALUE_TYPE COMPUTE_IF_PRESENTNonDefault(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		Objects.requireNonNull(mappingFunction);
+		int index = findIndex(key);
 		if(index == -1 || VALUE_EQUALS(values[index], getDefaultReturnValue())) return getDefaultReturnValue();
 		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, values[index]);
 		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {

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

@@ -363,6 +363,30 @@ public class ENUM_MAP KEY_ENUM_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE
 		int index = key.ordinal();
 		if(!isSet(index)) {
 			VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, getDefaultReturnValue());
+#if VALUE_OBJECT
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+			set(index);
+			values[index] = newValue;
+			return newValue;
+		}
+		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, values[index]);
+#if VALUE_OBJECT
+		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+			clear(index);
+			values[index] = EMPTY_VALUE;
+			return newValue;
+		}
+#endif
+		values[index] = newValue;
+		return newValue;
+	}
+	
+	@Override
+	public VALUE_TYPE COMPUTENonDefault(T key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		int index = key.ordinal();
+		if(!isSet(index)) {
+			VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, getDefaultReturnValue());
 			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
 			set(index);
 			values[index] = newValue;
@@ -383,6 +407,29 @@ public class ENUM_MAP KEY_ENUM_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE
 		int index = key.ordinal();
 		if(!isSet(index)) {
 			VALUE_TYPE newValue = mappingFunction.APPLY(key);
+#if VALUE_OBJECT
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+			set(index);
+			values[index] = newValue;			
+			return newValue;
+		}
+		VALUE_TYPE newValue = values[index];
+#if VALUE_OBJECT
+		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+			newValue = mappingFunction.APPLY(key);
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+			values[index] = newValue;
+		}
+#endif
+		return newValue;
+	}
+	
+	@Override
+	public VALUE_TYPE COMPUTE_IF_ABSENTNonDefault(T key, FUNCTION KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		int index = key.ordinal();
+		if(!isSet(index)) {
+			VALUE_TYPE newValue = mappingFunction.APPLY(key);
 			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
 			set(index);
 			values[index] = newValue;			
@@ -402,6 +449,29 @@ public class ENUM_MAP KEY_ENUM_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE
 		int index = key.ordinal();
 		if(!isSet(index)) {
 			VALUE_TYPE newValue = valueProvider.VALUE_SUPPLY_GET();
+#if VALUE_OBJECT
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+			set(index);
+			values[index] = newValue;			
+			return newValue;
+		}
+		VALUE_TYPE newValue = values[index];
+#if VALUE_OBJECT
+		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+			newValue = valueProvider.VALUE_SUPPLY_GET();
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+			values[index] = newValue;
+		}
+#endif
+		return newValue;
+	}
+	
+	@Override
+	public VALUE_TYPE SUPPLY_IF_ABSENTNonDefault(T key, VALUE_SUPPLIER VALUE_GENERIC_TYPE valueProvider) {
+		int index = key.ordinal();
+		if(!isSet(index)) {
+			VALUE_TYPE newValue = valueProvider.VALUE_SUPPLY_GET();
 			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
 			set(index);
 			values[index] = newValue;			
@@ -419,6 +489,25 @@ public class ENUM_MAP KEY_ENUM_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE
 	@Override
 	public VALUE_TYPE COMPUTE_IF_PRESENT(T key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
 		int index = key.ordinal();
+#if !VALUE_OBJECT
+		if(!isSet(index)) return getDefaultReturnValue();
+		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, values[index]);
+#else
+		if(!isSet(index) || VALUE_EQUALS(values[index], getDefaultReturnValue())) return getDefaultReturnValue();
+		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, values[index]);
+		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+			clear(index);
+			values[index] = EMPTY_VALUE;
+			return newValue;
+		}
+#endif
+		values[index] = newValue;
+		return newValue;
+	}
+	
+	@Override
+	public VALUE_TYPE COMPUTE_IF_PRESENTNonDefault(T key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		int index = key.ordinal();
 		if(!isSet(index) || VALUE_EQUALS(values[index], getDefaultReturnValue())) return getDefaultReturnValue();
 		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, values[index]);
 		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {

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

@@ -546,6 +546,32 @@ public class AVL_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_
 		Objects.requireNonNull(mappingFunction);
 #if TYPE_OBJECT
 		validate(key);
+#endif
+		Node KEY_VALUE_GENERIC_TYPE entry = findNode(key);
+		if(entry == null) {
+			VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, getDefaultReturnValue());
+#if VALUE_OBJECT
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+			put(key, newValue);
+			return newValue;
+		}
+		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, entry.value);
+#if VALUE_OBJECT
+		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+			removeNode(entry);
+			return newValue;
+		}
+#endif
+		entry.value = newValue;
+		return newValue;
+	}
+	
+	@Override
+	public VALUE_TYPE COMPUTENonDefault(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		Objects.requireNonNull(mappingFunction);
+#if TYPE_OBJECT
+		validate(key);
 #endif
 		Node KEY_VALUE_GENERIC_TYPE entry = findNode(key);
 		if(entry == null) {
@@ -568,6 +594,31 @@ public class AVL_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_
 		Objects.requireNonNull(mappingFunction);
 #if TYPE_OBJECT
 		validate(key);
+#endif
+		Node KEY_VALUE_GENERIC_TYPE entry = findNode(key);
+		if(entry == null) {
+			VALUE_TYPE newValue = mappingFunction.APPLY(key);
+#if VALUE_OBJECT
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+			put(key, newValue);
+			return newValue;
+		}
+#if VALUE_OBJECT
+		if(Objects.equals(entry.value, getDefaultReturnValue())) {
+			VALUE_TYPE newValue = mappingFunction.APPLY(key);
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+			entry.value = newValue;
+		}
+#endif
+		return entry.value;
+	}
+	
+	@Override
+	public VALUE_TYPE COMPUTE_IF_ABSENTNonDefault(KEY_TYPE key, FUNCTION KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		Objects.requireNonNull(mappingFunction);
+#if TYPE_OBJECT
+		validate(key);
 #endif
 		Node KEY_VALUE_GENERIC_TYPE entry = findNode(key);
 		if(entry == null) {
@@ -589,6 +640,31 @@ public class AVL_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_
 		Objects.requireNonNull(valueProvider);
 #if TYPE_OBJECT
 		validate(key);
+#endif
+		Node KEY_VALUE_GENERIC_TYPE entry = findNode(key);
+		if(entry == null) {
+			VALUE_TYPE newValue = valueProvider.VALUE_SUPPLY_GET();
+#if VALUE_OBJECT
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+			put(key, newValue);
+			return newValue;
+		}
+#if VALUE_OBJECT
+		if(VALUE_EQUALS(entry.value, getDefaultReturnValue())) {
+			VALUE_TYPE newValue = valueProvider.VALUE_SUPPLY_GET();
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+			entry.value = newValue;
+		}
+#endif
+		return entry.value;
+	}
+	
+	@Override
+	public VALUE_TYPE SUPPLY_IF_ABSENTNonDefault(KEY_TYPE key, VALUE_SUPPLIER VALUE_GENERIC_TYPE valueProvider) {
+		Objects.requireNonNull(valueProvider);
+#if TYPE_OBJECT
+		validate(key);
 #endif
 		Node KEY_VALUE_GENERIC_TYPE entry = findNode(key);
 		if(entry == null) {
@@ -610,6 +686,28 @@ public class AVL_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_
 		Objects.requireNonNull(mappingFunction);
 #if TYPE_OBJECT
 		validate(key);
+#endif
+		Node KEY_VALUE_GENERIC_TYPE entry = findNode(key);
+#if !VALUE_OBJECT
+		if(entry == null) return getDefaultReturnValue();
+		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, entry.value);
+#else
+		if(entry == null || VALUE_EQUALS(entry.value, getDefaultReturnValue())) return getDefaultReturnValue();
+		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, entry.value);
+		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+			removeNode(entry);
+			return newValue;
+		}
+#endif
+		entry.value = newValue;
+		return newValue;
+	}
+	
+	@Override
+	public VALUE_TYPE COMPUTE_IF_PRESENTNonDefault(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		Objects.requireNonNull(mappingFunction);
+#if TYPE_OBJECT
+		validate(key);
 #endif
 		Node KEY_VALUE_GENERIC_TYPE entry = findNode(key);
 		if(entry == null || VALUE_EQUALS(entry.value, getDefaultReturnValue())) return getDefaultReturnValue();

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

@@ -548,6 +548,32 @@ public class RB_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_G
 		Objects.requireNonNull(mappingFunction);
 #if TYPE_OBJECT
 		validate(key);
+#endif
+		Node KEY_VALUE_GENERIC_TYPE entry = findNode(key);
+		if(entry == null) {
+			VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, getDefaultReturnValue());
+#if VALUE_OBJECT
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+			put(key, newValue);
+			return newValue;
+		}
+		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, entry.value);
+#if VALUE_OBJECT
+		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+			removeNode(entry);
+			return newValue;
+		}
+#endif
+		entry.value = newValue;
+		return newValue;
+	}
+	
+	@Override
+	public VALUE_TYPE COMPUTENonDefault(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		Objects.requireNonNull(mappingFunction);
+#if TYPE_OBJECT
+		validate(key);
 #endif
 		Node KEY_VALUE_GENERIC_TYPE entry = findNode(key);
 		if(entry == null) {
@@ -570,6 +596,31 @@ public class RB_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_G
 		Objects.requireNonNull(mappingFunction);
 #if TYPE_OBJECT
 		validate(key);
+#endif
+		Node KEY_VALUE_GENERIC_TYPE entry = findNode(key);
+		if(entry == null) {
+			VALUE_TYPE newValue = mappingFunction.APPLY(key);
+#if VALUE_OBJECT
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+			put(key, newValue);
+			return newValue;
+		}
+#if VALUE_OBJECT
+		if(Objects.equals(entry.value, getDefaultReturnValue())) {
+			VALUE_TYPE newValue = mappingFunction.APPLY(key);
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+			entry.value = newValue;
+		}
+#endif
+		return entry.value;
+	}
+	
+	@Override
+	public VALUE_TYPE COMPUTE_IF_ABSENTNonDefault(KEY_TYPE key, FUNCTION KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		Objects.requireNonNull(mappingFunction);
+#if TYPE_OBJECT
+		validate(key);
 #endif
 		Node KEY_VALUE_GENERIC_TYPE entry = findNode(key);
 		if(entry == null) {
@@ -591,6 +642,31 @@ public class RB_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_G
 		Objects.requireNonNull(valueProvider);
 #if TYPE_OBJECT
 		validate(key);
+#endif
+		Node KEY_VALUE_GENERIC_TYPE entry = findNode(key);
+		if(entry == null) {
+			VALUE_TYPE newValue = valueProvider.VALUE_SUPPLY_GET();
+#if VALUE_OBJECT
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+#endif
+			put(key, newValue);
+			return newValue;
+		}
+#if VALUE_OBJECT
+		if(VALUE_EQUALS(entry.value, getDefaultReturnValue())) {
+			VALUE_TYPE newValue = valueProvider.VALUE_SUPPLY_GET();
+			if(VALUE_EQUALS(newValue, getDefaultReturnValue())) return newValue;
+			entry.value = newValue;
+		}
+#endif
+		return entry.value;
+	}
+	
+	@Override
+	public VALUE_TYPE SUPPLY_IF_ABSENTNonDefault(KEY_TYPE key, VALUE_SUPPLIER VALUE_GENERIC_TYPE valueProvider) {
+		Objects.requireNonNull(valueProvider);
+#if TYPE_OBJECT
+		validate(key);
 #endif
 		Node KEY_VALUE_GENERIC_TYPE entry = findNode(key);
 		if(entry == null) {
@@ -612,6 +688,28 @@ public class RB_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_G
 		Objects.requireNonNull(mappingFunction);
 #if TYPE_OBJECT
 		validate(key);
+#endif
+		Node KEY_VALUE_GENERIC_TYPE entry = findNode(key);
+#if !VALUE_OBJECT
+		if(entry == null) return getDefaultReturnValue();
+		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, entry.value);
+#else
+		if(entry == null || VALUE_EQUALS(entry.value, getDefaultReturnValue())) return getDefaultReturnValue();
+		VALUE_TYPE newValue = mappingFunction.APPLY_VALUE(key, entry.value);
+		if(VALUE_EQUALS(newValue, getDefaultReturnValue())) {
+			removeNode(entry);
+			return newValue;
+		}
+#endif
+		entry.value = newValue;
+		return newValue;
+	}
+	
+	@Override
+	public VALUE_TYPE COMPUTE_IF_PRESENTNonDefault(KEY_TYPE key, UNARY_OPERATOR KEY_VALUE_GENERIC_TYPE mappingFunction) {
+		Objects.requireNonNull(mappingFunction);
+#if TYPE_OBJECT
+		validate(key);
 #endif
 		Node KEY_VALUE_GENERIC_TYPE entry = findNode(key);
 		if(entry == null || VALUE_EQUALS(entry.value, getDefaultReturnValue())) return getDefaultReturnValue();

src/builder/resources/speiger/assets/collections/templates/utils/Lists.template

@@ -413,6 +413,11 @@ public class LISTS
 			return LISTS.synchronize(l.subList(from, to));
 		}
 		
+		@Override
+		public LIST KEY_GENERIC_TYPE reversed() {
+			return LISTS.synchronize(l.reversed());
+		}
+		
 		@Override
 		public void size(int size) { synchronized(mutex) { l.size(size); } }
 		
@@ -535,6 +540,11 @@ public class LISTS
 			return LISTS.unmodifiable(l.subList(from, to));
 		}
 		
+		@Override
+		public LIST KEY_GENERIC_TYPE reversed() {
+			return LISTS.unmodifiable(l.reversed());
+		}
+		
 		@Override
 		public void size(int size) { throw new UnsupportedOperationException(); }
 		
@@ -636,6 +646,9 @@ public class LISTS
 		@Override
 		public LIST KEY_GENERIC_TYPE subList(int from, int to) { throw new UnsupportedOperationException(); }
 		
+		@Override
+		public LIST KEY_GENERIC_TYPE reversed() { return this; }
+		
 		@Override
 		public void size(int size) { throw new UnsupportedOperationException(); }