Added clone

Author: JanHolger

src/main/java/org/javawebstack/abstractdata/AbstractArray.java

@@ -137,4 +137,10 @@ public Map<String[], Object> toTree(){
         return object().toTree();
     }
 
+    public AbstractElement clone() {
+        AbstractArray array = new AbstractArray();
+        forEach(e -> array.add(e.clone()));
+        return array;
+    }
+
 }

src/main/java/org/javawebstack/abstractdata/AbstractElement.java

@@ -155,6 +155,8 @@ default String toFormDataString() {
         return toFormData().toString();
     }
 
+    AbstractElement clone();
+
     Map<String[], Object> toTree();
 
     static AbstractElement fromJson(JsonElement element) {

src/main/java/org/javawebstack/abstractdata/AbstractNull.java

@@ -30,6 +30,10 @@ public Map<String[], Object> toTree() {
         return map;
     }
 
+    public AbstractElement clone() {
+        return this;
+    }
+
     public Type getType() {
         return Type.NULL;
     }

src/main/java/org/javawebstack/abstractdata/AbstractObject.java

@@ -124,4 +124,10 @@ public Set<String> keys(){
         return entries.keySet();
     }
 
+    public AbstractElement clone() {
+        AbstractObject object = new AbstractObject();
+        forEach((k, v) -> object.set(k, v.clone()));
+        return object;
+    }
+
 }

src/main/java/org/javawebstack/abstractdata/AbstractPrimitive.java

@@ -102,4 +102,8 @@ public String toString(){
         return value.toString();
     }
 
+    public AbstractElement clone() {
+        return from(value);
+    }
+
 }