Added JSON_PROXY to copy arrays and objects by reference

srcs/Internals/JsonNode.cpp

@@ -3,11 +3,16 @@
 #include "JsonWriter.h"
 #include "../JsonArray.h"
 #include "../JsonObject.h"
+#include "../JsonBuffer.h"
 
 void JsonNode::writeTo(JsonWriter& writer)
 {
     switch (type)
     {
+    case JSON_PROXY:
+        content.asProxy.target->writeTo(writer);
+        break;
+
     case JSON_ARRAY:
         writeArrayTo(writer);
         break;
@@ -36,7 +41,11 @@ void JsonNode::writeTo(JsonWriter& writer)
 
 void JsonNode::addChild(JsonNode* childToAdd)
 {
-    if (type != JSON_ARRAY && type != JSON_OBJECT) return;
+    if (type == JSON_PROXY) 
+        return content.asProxy.target->addChild(childToAdd);
+
+    if (type != JSON_ARRAY && type != JSON_OBJECT) 
+        return;
 
     JsonNode* lastChild = content.asContainer.child;
 
@@ -54,6 +63,9 @@ void JsonNode::addChild(JsonNode* childToAdd)
 
 void JsonNode::removeChild(JsonNode* childToRemove)
 {
+    if (type == JSON_PROXY)
+        return content.asProxy.target->removeChild(childToRemove);
+
     if (type != JSON_ARRAY && type != JSON_OBJECT) return;
 
     if (content.asContainer.child == childToRemove)
@@ -121,4 +133,17 @@ void JsonNode::writeObjectTo(JsonWriter& writer)
     {
         writer.writeEmptyObject();
     }
+}
+
+void JsonNode::setAsProxyOfSelf()
+{
+    JsonBuffer* buffer = content.asContainer.buffer;
+    if (!buffer) return;
+        
+    JsonNode* newNode = buffer->createNode(); 
+    if (!newNode) return;
+
+    *newNode = *this;
+
+    setAsProxyOf(newNode);
 }

srcs/Internals/JsonNode.h

@@ -18,6 +18,7 @@ class JsonNode
         JSON_BOOLEAN,
         JSON_STRING,
         JSON_LONG,
+        JSON_PROXY,
         JSON_DOUBLE_0_DECIMALS,
         JSON_DOUBLE_1_DECIMAL,
         JSON_DOUBLE_2_DECIMALS,
@@ -126,11 +127,13 @@ public:
 
     JsonBuffer* getContainerBuffer()
     {
+        if (type == JSON_PROXY) return content.asProxy.target->getContainerBuffer();
         return type == JSON_ARRAY || type == JSON_OBJECT ? content.asContainer.buffer : 0;
     }
 
     JsonNode* getContainerChild()
     {
+        if (type == JSON_PROXY) return content.asProxy.target->getContainerChild();
         return type == JSON_ARRAY || type == JSON_OBJECT ? content.asContainer.child : 0;
     }
 
@@ -148,6 +151,23 @@ public:
 
     void removeChild(JsonNode* childToRemove);
 
+    void duplicate(JsonNode* other)
+    {
+        if (!other)
+        {
+            type = JSON_UNDEFINED;
+        } 
+        else  if (other->type == JSON_ARRAY || other->type==JSON_OBJECT)
+        {
+            other->setAsProxyOfSelf();
+            setAsProxyOf(other->content.asProxy.target);
+        } 
+        else
+        {
+            *this = *other;
+        }
+    }
+
 private:
     JsonNode* next;
     JsonNodeContent content;
@@ -155,4 +175,12 @@ private:
 
     inline void writeArrayTo(JsonWriter&);// TODO: <- move in JsonNodeSerializer
     inline void writeObjectTo(JsonWriter&);// TODO: <- move in JsonNodeSerializer
+
+    void setAsProxyOfSelf();
+
+    void setAsProxyOf(JsonNode* target)
+    {
+        type = JSON_PROXY;
+        content.asProxy.target = target;
+    }
 };

srcs/Internals/JsonNodeWrapper.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#include "JsonNode.h"
+class JsonValue;
+
+class JsonNodeWrapper
+{
+    friend JsonValue;
+
+public:
+    JsonNodeWrapper()
+        : _node(0)
+    {
+    }
+
+    explicit JsonNodeWrapper(JsonNode* node)
+        : _node(node)
+    {
+    }
+
+protected:
+
+    void duplicate(const JsonNodeWrapper& other)
+    {
+        if (!_node)
+        {
+            _node = other._node;
+        }
+        else
+        {
+            _node->duplicate(other._node);
+        }
+    }
+
+    JsonNode* _node;
+};
+

srcs/JsonArray.cpp

@@ -50,6 +50,7 @@ void JsonArray::add(long value)
     addChild(node);
 }
 
+// TODO: we should have the same issue as in JsonValue
 void JsonArray::add(JsonContainer nestedContainer)
 {
     JsonNode* node = createNode();

srcs/JsonBuffer.h

@@ -6,6 +6,7 @@
 class JsonBuffer
 {
     friend class JsonContainer;
+    friend class JsonNode;
 
 public:
     virtual ~JsonBuffer() {};

srcs/JsonContainer.h

@@ -4,24 +4,23 @@
 #include "Internals/JsonNodeIterator.h"
 #include "Internals/JsonNode.h"
 #include "Internals/IndentedPrint.h"
-
+#include "Internals/JsonNodeWrapper.h"
 class JsonArray;
 class JsonObject;
 class JsonValue;
 
-class JsonContainer : public Printable
+class JsonContainer : public Printable, public JsonNodeWrapper
 {
-    friend JsonValue;
+  // friend JsonValue;
     friend JsonArray;
 
 public:
-    JsonContainer()
-        : _node(0)
-    {
-    }
 
-    JsonContainer(JsonNode* node)
-        : _node(node)
+
+    JsonContainer() {}
+
+    explicit JsonContainer(JsonNode* node)
+        : JsonNodeWrapper(node)
     {
     }
 
@@ -54,7 +53,5 @@ protected:
     void addChild(JsonNode*);
     void removeChild(JsonNode*);
     JsonNode* createNode();
-
-    JsonNode* _node;
 };
 

srcs/JsonValue.cpp

@@ -28,32 +28,6 @@ void JsonValue::operator=(int value)
         _node->setAsLong(value);
 }
 
-// TODO: it's a duplicate
-void JsonValue::operator=(const JsonContainer& object)
-{
-    if (!_node)
-    {
-        _node = object._node;
-    }
-    else
-    {
-        *_node = *object._node;
-    }
-}
-
-// TODO: it's a duplicate
-void JsonValue::operator=(JsonValue const& value)
-{
-    if (!_node)
-    {
-        _node = value._node;        
-    }
-    else
-    {
-        *_node = *value._node;
-    }    
-}
-
 JsonValue::operator bool() const
 {
     return _node ? _node->getAsBoolean() : false;

srcs/JsonValue.h

@@ -1,21 +1,19 @@
 #pragma once
 
+#include "Internals/JsonNodeWrapper.h"
+
 class JsonArray;
 class JsonContainer;
 class JsonObject;
-class JsonNode;
 
-class JsonValue
+class JsonValue : public JsonNodeWrapper
 {
 public:
-    
-    explicit JsonValue()
-        : _node(0)
-    {
-    }
+
+    JsonValue() {}
 
     explicit JsonValue(JsonNode* node)
-        : _node(node)
+        : JsonNodeWrapper(node)
     {
     }
 
@@ -23,9 +21,9 @@ public:
     void operator=(const char*);
     void operator=(double x) { set(x, 2); }
     void operator=(int);
-    void operator=(const JsonContainer&);
-    void operator=(const JsonValue&);
-    
+    void operator=(const JsonValue& value) { duplicate(value); }
+    void operator=(const JsonNodeWrapper& object) { duplicate(object); }
+        
     operator bool() const;
     operator const char*() const;
     operator double() const;
@@ -35,7 +33,4 @@ public:
     operator JsonObject() const;
 
     void set(double value, int decimals);
-
-private:
-    JsonNode* _node;
 };

srcs/srcs.vcxproj

@@ -83,6 +83,7 @@
     <ClInclude Include="Internals\JsonWriter.h" />
     <ClInclude Include="JsonContainer.h" />
     <ClInclude Include="Internals\JsonNodeIterator.h" />
+    <ClInclude Include="Internals\JsonNodeWrapper.h" />
     <ClInclude Include="JsonObject.h" />
     <ClInclude Include="JsonValue.h" />
     <ClInclude Include="Arduino\Print.h" />

srcs/srcs.vcxproj.filters

@@ -63,6 +63,9 @@
     <ClInclude Include="Internals\IndentedPrint.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="Internals\JsonNodeWrapper.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="JsonObject.cpp">

tests/JsonObject_Serialization_Tests.cpp

@@ -123,21 +123,35 @@ TEST_F(JsonObject_Serialization_Tests, OneFalse)
     object["key"] = false;
     outputMustBe("{\"key\":false}");
 }
-/*
-TEST_F(JsonObject_Serialization_Tests, OneEmptyNestedArray)
+
+TEST_F(JsonObject_Serialization_Tests, OneEmptyNestedArrayViaProxy)
 {
-    auto nestedArray = JsonArray<1>();
+    auto nestedArray = json.createArray();
 
     object["key"] = nestedArray;
 
     outputMustBe("{\"key\":[]}");
 }
-*/
-TEST_F(JsonObject_Serialization_Tests, OneEmptyNestedObject)
-{
-    auto nestedObject = json.createObject();
 
-    object["key"] = nestedObject;
+TEST_F(JsonObject_Serialization_Tests, OneEmptyNestedObjectViaProxy)
+{
+    auto nestedArray = json.createObject();
+
+    object["key"] = nestedArray;
 
     outputMustBe("{\"key\":{}}");
+}
+
+TEST_F(JsonObject_Serialization_Tests, OneEmptyNestedObject)
+{
+    object.createNestedObject("key");
+
+    outputMustBe("{\"key\":{}}");
+}
+
+TEST_F(JsonObject_Serialization_Tests, OneEmptyNestedArray)
+{
+    object.createNestedArray("key");
+
+    outputMustBe("{\"key\":[]}");
 }

tests/JsonValueTests.cpp

@@ -101,12 +101,10 @@ TEST_F(JsonValueTests, ObjectsAreCopiedByReference)
     JsonObject object = json.createObject();
 
     jsonValue1 = object;
-    jsonValue2 = jsonValue1;
 
     object["hello"] = "world";
-    jsonValue1 = 0;
 
-    EXPECT_EQ(1, ((JsonObject) jsonValue2).size());
+    EXPECT_EQ(1, ((JsonObject) jsonValue1).size());
 }
 
 TEST_F(JsonValueTests, ArraysAreCopiedByReference)
@@ -114,10 +112,8 @@ TEST_F(JsonValueTests, ArraysAreCopiedByReference)
     JsonArray array = json.createArray();
 
     jsonValue1 = array;
-    jsonValue2 = jsonValue1;
-    jsonValue1 = 0;
     
     array.add("world");
 
-    EXPECT_EQ(1, ((JsonObject) jsonValue2).size());
+    EXPECT_EQ(1, ((JsonObject) jsonValue1).size());
 }