Started working on the next patch.

- Added: ISizeProvider interface (Optimization Helper)
- Added: ISizeProvider into most Iterable implementations
(Distinct/Filter/FlatMap/ArrayFlatMap don't support it, for obvious
reasons)
- Added: ToArray function into Iterable which uses ISizeProvider to
reduce overhead of duplicating arrays.
- Fixed: putIfAbsent now replaces defaultValues

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

@@ -1812,6 +1812,11 @@ public class CONCURRENT_HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY
 					insert(-slot-1, key, value);
 					return getDefaultReturnValue();
 				}
+				else if(VALUE_EQUALS(values[slot], getDefaultReturnValue())) {
+					VALUE_TYPE oldValue = values[slot];
+					values[slot] = value;
+					return oldValue;
+				}
 				return values[slot];
 			}
 			finally {

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

@@ -270,6 +270,11 @@ public class CUSTOM_HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VAL
 			insert(-slot-1, key, value);
 			return getDefaultReturnValue();
 		}
+		else if(VALUE_EQUALS(values[slot], getDefaultReturnValue())) {
+			VALUE_TYPE oldValue = values[slot];
+			values[slot] = value;
+			return oldValue;
+		}
 		return values[slot];
 	}
 	

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

@@ -245,6 +245,11 @@ public class HASH_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_GENE
 			insert(-slot-1, key, value);
 			return getDefaultReturnValue();
 		}
+		else if(VALUE_EQUALS(values[slot], getDefaultReturnValue())) {
+			VALUE_TYPE oldValue = values[slot];
+			values[slot] = value;
+			return oldValue;
+		}
 		return values[slot];
 	}
 	

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

@@ -202,6 +202,11 @@ public class ARRAY_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_GEN
 			insertIndex(size++, key, value);
 			return getDefaultReturnValue();
 		}
+		else if(VALUE_EQUALS(values[index], getDefaultReturnValue())) {
+			VALUE_TYPE oldValue = values[index];
+			values[index] = value;
+			return oldValue;
+		}
 		return values[index];
 	}
 	

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

@@ -161,7 +161,14 @@ public class ENUM_MAP KEY_ENUM_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE
 	@Override
 	public VALUE_TYPE putIfAbsent(T key, VALUE_TYPE value) {
 		int index = key.ordinal();
-		if(isSet(index)) return values[index];
+		if(isSet(index)) {
+			if(VALUE_EQUALS(values[index], getDefaultReturnValue())) {
+				VALUE_TYPE oldValue = values[index];
+				values[index] = value;
+				return oldValue;
+			}
+			return values[index];
+		}
 		set(index);
 		values[index] = value;
 		return getDefaultReturnValue();

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

@@ -280,7 +280,10 @@ public class AVL_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_
 		int compare = 0;
 		Node KEY_VALUE_GENERIC_TYPE parent = tree;
 		while(true) {
-			if((compare = compare(key, parent.key)) == 0) return parent.value;
+			if((compare = compare(key, parent.key)) == 0) {
+				if(VALUE_EQUALS(parent.value, getDefaultReturnValue())) return parent.setValue(value);
+				return parent.value;
+			}
 			if(compare < 0) {
 				if(parent.left == null) break;
 				parent = parent.left;

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

@@ -280,7 +280,10 @@ public class RB_TREE_MAP KEY_VALUE_GENERIC_TYPE extends ABSTRACT_MAP KEY_VALUE_G
 		int compare = 0;
 		Node KEY_VALUE_GENERIC_TYPE parent = tree;
 		while(true) {
-			if((compare = compare(key, parent.key)) == 0) return parent.value;
+			if((compare = compare(key, parent.key)) == 0) {
+				if(VALUE_EQUALS(parent.value, getDefaultReturnValue())) return parent.setValue(value);
+				return parent.value;
+			}
 			if(compare < 0) {
 				if(parent.left == null) break;
 				parent = parent.left;

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

@@ -102,6 +102,26 @@ public interface MAP KEY_VALUE_GENERIC_TYPE extends Map<CLASS_TYPE, CLASS_VALUE_
 	 */
 	public VALUE_TYPE put(KEY_TYPE key, VALUE_TYPE value);
 	
+	/**
+	 * A Helper method that allows to put int a MAP.Entry into a map.
+	 * @param entry then Entry that should be inserted.
+	 * @return the last present value or default return value.
+	 */
+	public default VALUE_TYPE put(Entry KEY_VALUE_GENERIC_TYPE entry) {
+		return put(entry.ENTRY_KEY(), entry.ENTRY_VALUE());
+	}
+	
+#if !TYPE_OBJECT || !VALUE_OBJECT
+	/**
+	 * A Helper method that allows to put int a Map.Entry into a map.
+	 * @param entry then Entry that should be inserted.
+	 * @return the last present value or default return	value.
+	 */
+	public default CLASS_VALUE_TYPE put(Map.Entry<CLASS_TYPE, CLASS_VALUE_TYPE> entry) {
+		return put(entry.getKey(), entry.getValue());
+	}
+
+#endif
 	/**
 	 * Type Specific array method to bulk add elements into a map without creating a wrapper and increasing performances
 	 * @param keys the keys that should be added