Refactoring JsonNode...

srcs/Internals/JsonNode.cpp

@@ -20,7 +20,7 @@ void JsonNode::writeTo(JsonWriter& writer)
         writer.writeString(content.asString);
         break;
 
-    case JSON_INTEGER:
+    case JSON_LONG:
         writer.writeInteger(content.asInteger);
         break;
 
@@ -28,10 +28,6 @@ void JsonNode::writeTo(JsonWriter& writer)
         writer.writeBoolean(content.asBoolean);
         break;
 
-    case JSON_PROXY:
-        content.asProxy.target->writeTo(writer);
-        break;
-
     default: // >= JSON_DOUBLE_0_DECIMALS
         writer.writeDouble(content.asDouble, type - JSON_DOUBLE_0_DECIMALS);
         break;

srcs/Internals/JsonNode.h

@@ -5,14 +5,13 @@ class JsonBuffer;
 enum JsonNodeType
 {
     JSON_UNDEFINED,
-    JSON_PROXY,
     JSON_NULL,
     JSON_ARRAY,
     JSON_OBJECT,
-    JSON_KEY,
+    JSON_KEY_VALUE,
     JSON_BOOLEAN,
     JSON_STRING,
-    JSON_INTEGER,
+    JSON_LONG,
     JSON_DOUBLE_0_DECIMALS,
     JSON_DOUBLE_1_DECIMAL,
     JSON_DOUBLE_2_DECIMALS,
@@ -23,10 +22,134 @@ class JsonWriter;
 
 struct JsonNode
 {
-    JsonNode* next;    
+    JsonNode* next;
     JsonNodeType type; // <- TODO: hide
-    
+
-    void writeTo(JsonWriter&);
+    void writeTo(JsonWriter&); // TODO: <- move in JsonNodeSerializer
+
+    void setAsArray(JsonBuffer* buffer)
+    {
+        type = JSON_ARRAY;
+        content.asContainer.child = 0;
+        content.asContainer.buffer = buffer;
+    }
+
+    void setAsBoolean(bool value)
+    {
+        type = JSON_BOOLEAN;
+        content.asBoolean = value;
+    }
+
+    void setAsLong(int value)
+    {
+        type = JSON_LONG;
+        content.asInteger = value;
+    }
+
+    void setAsString(char const* value)
+    {
+        type = JSON_STRING;
+        content.asString = value;
+    }
+
+    void setAsDouble(double value, int decimals)
+    {
+        type = (JsonNodeType) (JSON_DOUBLE_0_DECIMALS + decimals);
+        content.asDouble = value;
+    }
+
+    void setAsObject(JsonBuffer* buffer)
+    {
+        type = JSON_OBJECT;
+        content.asContainer.child = 0;
+        content.asContainer.buffer = buffer;
+    }
+
+    void setAsObjectKeyValue(const char* key, JsonNode* value)
+    {
+        type = JSON_KEY_VALUE;
+        content.asKey.key = key;
+        content.asKey.value = value;
+    }
+
+    bool getAsBoolean()
+    {
+        return type == JSON_BOOLEAN ? content.asBoolean : false;
+    }
+
+    double getAsDouble()
+    {
+        return type > JSON_DOUBLE_0_DECIMALS ? content.asDouble : 0;
+    }
+
+    long getAsInteger()
+    {
+        return type == JSON_LONG ? content.asInteger : 0;
+    }
+
+    const char* getAsString()
+    {
+        return type == JSON_STRING ? content.asString : 0;
+    }
+
+    JsonBuffer* getContainerBuffer()
+    {
+        return type == JSON_ARRAY || type == JSON_OBJECT ? content.asContainer.buffer : 0;
+    }
+
+    JsonNode* getContainerChild()
+    {
+        return type == JSON_ARRAY || type == JSON_OBJECT ? content.asContainer.child : 0;
+    }
+
+    const char* getAsObjectKey()
+    {
+        return type == JSON_KEY_VALUE ? content.asKey.key : 0;
+    }
+
+    JsonNode* getAsObjectValue()
+    {
+        return type == JSON_KEY_VALUE ? content.asKey.value : 0;
+    }
+
+    void addChildToContainer(JsonNode* childToAdd)
+    {
+        if (type != JSON_ARRAY && type != JSON_OBJECT) return;
+
+        JsonNode* lastChild = content.asContainer.child;
+
+        if (!lastChild)
+        {
+            content.asContainer.child = childToAdd;
+            return;
+        }
+
+        while (lastChild->next)
+            lastChild = lastChild->next;
+
+        lastChild->next = childToAdd;
+    }
+
+    void removeChildFromContainer(JsonNode* childToRemove)
+    {
+        if (type != JSON_ARRAY && type != JSON_OBJECT) return;
+
+        if (content.asContainer.child == childToRemove)
+        {
+            content.asContainer.child = childToRemove->next;
+            return;
+        }
+
+        for (JsonNode* child = content.asContainer.child; child; child = child->next)
+        {
+            if (child->next == childToRemove)
+                child->next = childToRemove->next;
+        }
+    }
+
+private:
+    inline void writeArrayTo(JsonWriter&);// TODO: <- move in JsonNodeSerializer
+    inline void writeObjectTo(JsonWriter&);// TODO: <- move in JsonNodeSerializer
 
     union
     {
@@ -35,7 +158,7 @@ struct JsonNode
         long asInteger;
         const char* asString;
 
-        struct 
+        struct
         {
             const char* key;
             JsonNode* value;
@@ -53,8 +176,4 @@ struct JsonNode
         } asProxy;
 
     } content;
-
-private:
-    inline void writeArrayTo(JsonWriter&);
-    inline void writeObjectTo(JsonWriter&);
 };

srcs/JsonArray.cpp

@@ -16,68 +16,71 @@ JsonValue JsonArray::operator[](int index) const
 
 void JsonArray::add(bool value)
 {
-    JsonNode* node = createNode(JSON_BOOLEAN);
+    JsonNode* node = createNode();
     if (!node) return;
 
-    node->content.asBoolean = value;
+    node->setAsBoolean(value);
     addChild(node);
 }
 
 void JsonArray::add(char const* value)
 {
-    JsonNode* node = createNode(JSON_STRING);
+    JsonNode* node = createNode();
     if (!node) return;
 
-    node->content.asString = value;
+    node->setAsString(value);
     addChild(node);
 }
 
 void JsonArray::add(double value, int decimals)
 {
-    JsonNode* node = createNode((JsonNodeType)(JSON_DOUBLE_0_DECIMALS + decimals));
+    JsonNode* node = createNode();
     if (!node) return;
 
-    node->content.asDouble = value;
+    node->setAsDouble(value, decimals);
     addChild(node);
 }
 
 void JsonArray::add(long value)
 {
-    JsonNode* node = createNode(JSON_INTEGER);
+    JsonNode* node = createNode(JSON_LONG);
     if (!node) return;
 
-    node->content.asInteger = value;
+    node->setAsLong(value);
     addChild(node);
 }
 
-void JsonArray::add(JsonContainer innerContainer)
+void JsonArray::add(JsonContainer nestedContainer)
 {
-    JsonNode* node = createNode(JSON_PROXY);
+    JsonNode* node = createNode();
     if (!node) return;
 
-    node->content.asProxy.target = innerContainer._node;
+    *node = *nestedContainer._node;
     addChild(node);
 }
 
 JsonArray JsonArray::createNestedArray()
 {
-    JsonNode* node = createNestedContainer(JSON_ARRAY);
+    JsonNode* node = createNode();
+    
+    if (node)
+    {
+        node->setAsArray(_node->getContainerBuffer());
+        addChild(node);
+    }
+    
     return JsonArray(node);
 }
 
 JsonObject JsonArray::createNestedObject()
 {
-    JsonNode* node = createNestedContainer(JSON_OBJECT);
+    JsonNode* node = createNode();
+    
+    if (node)
+    {
+        node->setAsObject(_node->getContainerBuffer());
+        addChild(node);
+    }
+    
     return JsonObject(node);
-}
-
-JsonNode* JsonArray::createNestedContainer(JsonNodeType type)
-{
-    JsonNode* node = createNode(type);
-    if (!node) return 0;
-
-    node->content.asContainer.buffer = _node->content.asContainer.buffer;
-    addChild(node);
-
-    return node;
 }

srcs/JsonArray.h

@@ -21,12 +21,9 @@ public:
     void add(double value, int decimals=2);
     void add(int value) { add((long) value); }
     void add(long value);
-    void add(JsonContainer nestedArray);
+    void add(JsonContainer nestedArray); // TODO: should allow JsonValue too
 
     JsonArray createNestedArray();
     JsonObject createNestedObject();
-
-private:
-    JsonNode* createNestedContainer(JsonNodeType type);
 };
 

srcs/JsonBuffer.cpp

@@ -20,14 +20,4 @@ JsonNode* JsonBuffer::createNode(JsonNodeType type)
     memset(node, 0, sizeof(JsonNode));
     node->type = type;
     return node;
-}
-
-JsonNode* JsonBuffer::createContainerNode(JsonNodeType type)
-{
-    JsonNode* node = createNode(type);
-
-    if (node)
-        node->content.asContainer.buffer = this;
-
-    return node;
 }

srcs/JsonBuffer.h

@@ -12,12 +12,16 @@ public:
 
     JsonArray createArray()
     {
-        return JsonArray(createContainerNode(JSON_ARRAY));
+        JsonNode* node = createNode();
+        if (node) node->setAsArray(this);
+        return JsonArray(node);
     }
 
     JsonObject createObject()
     {
-        return JsonObject(createContainerNode(JSON_OBJECT));
+        JsonNode* node = createNode();
+        if (node) node->setAsObject(this);
+        return JsonObject(node);
     }
 
     JsonValue createValue();
@@ -26,7 +30,6 @@ protected:
     virtual JsonNode* allocateNode() = 0;
 
 private:
-    JsonNode* createNode(JsonNodeType type);
+    JsonNode* createNode(JsonNodeType type = JSON_UNDEFINED);
-    JsonNode* createContainerNode(JsonNodeType type);
 };
 

srcs/JsonContainer.cpp

@@ -37,7 +37,9 @@ JsonNode* JsonContainer::createNode(JsonNodeType type)
 {
     if (!_node) return 0;
 
-    JsonBuffer* buffer = _node->content.asContainer.buffer;
+    JsonBuffer* buffer = _node->getContainerBuffer();
+    if (!buffer) return 0;
+
     return buffer->createNode(type);
 }
 
@@ -48,31 +50,19 @@ bool JsonContainer::checkNodeType(JsonNodeType expectedType)
 
 bool JsonContainer::operator==(const JsonContainer & other) const
 {
-    return _node == other._node;
+    return _node->getContainerChild() == other._node->getContainerChild();
 }
 
-void JsonContainer::addChild(JsonNode* newChild)
+void JsonContainer::addChild(JsonNode* childToAdd)
 {
-    JsonNode* lastChild = _node->content.asContainer.child;
+    if (_node)
-
+        _node->addChildToContainer(childToAdd);
-    if (!lastChild)
-    {
-        _node->content.asContainer.child = newChild = newChild;
-        return;
-    }
-
-    while (lastChild->next)
-        lastChild = lastChild->next;
-
-    lastChild->next = newChild;
 }
 
-void JsonContainer::removeChildAfter(JsonNode* child, JsonNode* previous)
+void JsonContainer::removeChild(JsonNode* childToRemove)
 {
-    if (previous)
+    if (_node)
-        previous->next = child->next;
+        _node->removeChildFromContainer(childToRemove);
-    else
-        _node->content.asContainer.child = child->next;
 }
 
 size_t JsonContainer::size() const

srcs/JsonContainer.h

@@ -43,7 +43,7 @@ protected:
 
     JsonNodeIterator beginChildren() const
     {
-        return JsonNodeIterator(_node ? _node->content.asContainer.child : 0);
+        return JsonNodeIterator(_node ? _node->getContainerChild() : 0);
     }
 
     JsonNodeIterator endChildren() const
@@ -51,9 +51,9 @@ protected:
         return JsonNodeIterator(0);
     }
 
-    void addChild(JsonNode* newChild);
+    void addChild(JsonNode*);
-    void removeChildAfter(JsonNode* child, JsonNode* previous);
+    void removeChild(JsonNode*);
-    JsonNode* createNode(JsonNodeType type);
+    JsonNode* createNode(JsonNodeType type = JSON_UNDEFINED);
 
     bool checkNodeType(JsonNodeType expectedType);
 

srcs/JsonObject.cpp

@@ -18,30 +18,34 @@ JsonValue JsonObject::operator[](char const* key)
 
 void JsonObject::remove(char const* key)
 {
-    JsonNode* lastChild = 0;
-
     for (JsonNodeIterator it = beginChildren(); it != endChildren(); ++it)
     {
-        const char* childKey = it->content.asKey.key;
+        const char* childKey = it->getAsObjectKey();
 
         if (!strcmp(childKey, key))
         {
-            removeChildAfter(*it, lastChild);
+            removeChild(*it);
-        }      
+        }
-
-        lastChild = *it;
     }
 }
 
 JsonArray JsonObject::createNestedArray(char const* key)
 {
-    JsonNode* node = createContainerNodeAt(key, JSON_ARRAY);
+    JsonNode* node = getOrCreateNodeAt(key);
+
+    if (node)
+        node->setAsArray(_node->getContainerBuffer());
+
     return JsonArray(node);
 }
 
 JsonObject JsonObject::createNestedObject(char const* key)
 {
-    JsonNode* node = createContainerNodeAt(key, JSON_OBJECT);
+    JsonNode* node = getOrCreateNodeAt(key);
+    
+    if (node)
+        node->setAsObject(_node->getContainerBuffer());
+
     return JsonObject(node);
 }
 
@@ -51,20 +55,19 @@ JsonNode* JsonObject::getOrCreateNodeAt(const char* key)
 
     for (JsonNodeIterator it = beginChildren(); it != endChildren(); ++it)
     {
-        const char* childKey = it->content.asKey.key;
+        const char* childKey = it->getAsObjectKey();
 
         if (!strcmp(childKey, key))
-            return it->content.asKey.value;
+            return it->getAsObjectValue();
     }
       
     JsonNode* newValueNode = createNode(JSON_UNDEFINED);
     if (!newValueNode) return 0;
     
-    JsonNode* newKeyNode = createNode(JSON_KEY);
+    JsonNode* newKeyNode = createNode(JSON_KEY_VALUE);
     if (!newKeyNode) return 0;
 
-    newKeyNode->content.asKey.key = key;
+    newKeyNode->setAsObjectKeyValue(key, newValueNode);
-    newKeyNode->content.asKey.value = newValueNode;
 
     addChild(newKeyNode);
 
@@ -76,9 +79,7 @@ JsonNode* JsonObject::createContainerNodeAt(char const* key, JsonNodeType type)
     JsonNode* node = getOrCreateNodeAt(key);
     if (!node) return 0;
     
-    node->type = type;
+    node->setAsArray(_node->getContainerBuffer());
-    node->content.asContainer.child = 0;
-    node->content.asContainer.buffer = _node->content.asContainer.buffer;
 
     return node;
 }

srcs/JsonValue.cpp

@@ -6,144 +6,80 @@
 
 void JsonValue::operator=(bool value)
 {
-    if (!_node) return;
+    if (_node)
-
+        _node->setAsBoolean(value);
-    _node->type = JSON_BOOLEAN;
-    _node->content.asBoolean = value;
 }
 
 void JsonValue::operator=(char const* value)
 {
-    if (!_node) return;
+    if (_node)
-
+        _node->setAsString(value);
-    _node->type = JSON_STRING;
-    _node->content.asString = value;
-}
-
-void JsonValue::operator=(double value)
-{
-    set(value, 2);
 }
 
 void JsonValue::set(double value, int decimals)
 {
-    if (!_node) return;
+    if (_node)
-
+        _node->setAsDouble(value, decimals);
-    _node->type = (JsonNodeType) (JSON_DOUBLE_0_DECIMALS + decimals);
-    _node->content.asDouble = value;
 }
 
 void JsonValue::operator=(int value)
 {
-    if (!_node) return;
+    if (_node)
-
+        _node->setAsLong(value);
-    _node->type = JSON_INTEGER;
-    _node->content.asInteger = value;
 }
 
+// TODO: it's a duplicate
 void JsonValue::operator=(const JsonContainer& object)
 {
-    setAsProxyTo(object._node);
+    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;
+        _node = value._node;        
-        return;
     }
-    
+    else
-    JsonNodeType nodeType = value._node ? value._node->type : JSON_UNDEFINED;    
-
-    switch (nodeType)
     {
-    case JSON_UNDEFINED:
-        _node->type = JSON_UNDEFINED;
-        break;
-
-    case JSON_INTEGER:
-        _node->type = JSON_INTEGER;
-        _node->content.asInteger = value._node->content.asInteger;
-        break;
-
-    case JSON_DOUBLE_0_DECIMALS:
-
-    case JSON_OBJECT:
-    case JSON_ARRAY:
-    case JSON_PROXY:
-        setAsProxyTo(value._node);
-        break;
-
-    default:
         *_node = *value._node;
-        break;
+    }    
-    }
 }
 
 JsonValue::operator bool() const
 {
-    const JsonNode* node = getActualNode();
+    return _node ? _node->getAsBoolean() : false;
-
-    if (!node || node->type != JSON_BOOLEAN) return 0;
-
-    return node->content.asBoolean;
 }
 
 JsonValue::operator char const*() const
 {
-    const JsonNode* node = getActualNode();
+    return _node ? _node->getAsString() : 0;
-
-    if (!node || node->type != JSON_STRING) return 0;
-
-    return node->content.asString;
 }
 
 JsonValue::operator double() const
 {
-    const JsonNode* node = getActualNode();
+    return _node ? _node->getAsDouble() : 0;
-
-    if (!node || node->type < JSON_DOUBLE_0_DECIMALS) return 0;
-
-    return node->content.asDouble;
 }
 
-JsonValue::operator int() const
+JsonValue::operator long() const
 {
-    const JsonNode* node = getActualNode();
+    return _node ? _node->getAsInteger() : 0;
-
-    if (!node || node->type != JSON_INTEGER) return 0;
-
-    return node->content.asInteger;
 }
 
 JsonValue::operator JsonArray() const
 {
-    return JsonArray(getActualNode());
+    return JsonArray(_node);
 }
 
 JsonValue::operator JsonObject() const
 {
-    return JsonObject(getActualNode());
+    return JsonObject(_node);
-}
-
-void JsonValue::setAsProxyTo(JsonNode* target)
-{
-    if (_node)
-    {
-        _node->type = JSON_PROXY;
-        _node->content.asProxy.target = target;
-    }
-
-    _node = target;
-}
-
-JsonNode* JsonValue::getActualNode() const
-{
-    JsonNode* target = _node;
-
-    while (target && target->type == JSON_PROXY)
-        target = target->content.asProxy.target;
-
-    return target;
 }

srcs/JsonValue.h

@@ -21,7 +21,7 @@ public:
 
     void operator=(bool);
     void operator=(const char*);
-    void operator=(double);
+    void operator=(double x) { set(x, 2); }
     void operator=(int);
     void operator=(const JsonContainer&);
     void operator=(const JsonValue&);
@@ -29,7 +29,8 @@ public:
     operator bool() const;
     operator const char*() const;
     operator double() const;
-    operator int() const;
+    operator long() const;
+    operator int() const { return operator long(); }
     operator JsonArray() const;
     operator JsonObject() const;
 
@@ -37,7 +38,4 @@ public:
 
 private:
     JsonNode* _node;
-
-    void setAsProxyTo(JsonNode*);
-    JsonNode* getActualNode() const;
 };

tests/JsonArray_PrintTo_Tests.cpp

@@ -135,18 +135,14 @@ TEST_F(JsonArray_PrintTo_Tests, OneBooleanOverCapacity)
 
 TEST_F(JsonArray_PrintTo_Tests, OneEmptyNestedArray)
 {
-    JsonArray nestedArray = json.createArray();
+    array.createNestedArray();
-    
-    array.add(nestedArray);
 
     outputMustBe("[[]]");
 }
 
 TEST_F(JsonArray_PrintTo_Tests, OneEmptyNestedHash)
 {
-    JsonObject nestedObject = json.createObject();
+    array.createNestedObject();
-
-    array.add(nestedObject);
 
     outputMustBe("[{}]");
 }

tests/JsonValueTests.cpp

@@ -59,7 +59,7 @@ TEST_F(JsonValueTests, CanStoreObject)
     EXPECT_EQ(innerObject1, (JsonObject) jsonValue1);
 }
 
-TEST_F(JsonValueTests, IntegerValuesAreCopied)
+TEST_F(JsonValueTests, IntegersAreCopiedByValue)
 {
     jsonValue1 = 123;
     jsonValue2 = jsonValue1;
@@ -68,7 +68,7 @@ TEST_F(JsonValueTests, IntegerValuesAreCopied)
     EXPECT_EQ(123, (int) jsonValue2);
 }
 
-TEST_F(JsonValueTests, DoubleValuesAreCopied)
+TEST_F(JsonValueTests, DoublesAreCopiedByValue)
 {
     jsonValue1 = 123.45;
     jsonValue2 = jsonValue1;
@@ -77,7 +77,7 @@ TEST_F(JsonValueTests, DoubleValuesAreCopied)
     EXPECT_EQ(123.45, (double) jsonValue2);
 }
 
-TEST_F(JsonValueTests, BooleanValuesAreCopied)
+TEST_F(JsonValueTests, BooleansAreCopiedByValue)
 {
     jsonValue1 = true;
     jsonValue2 = jsonValue1;
@@ -86,7 +86,7 @@ TEST_F(JsonValueTests, BooleanValuesAreCopied)
     EXPECT_TRUE((bool) jsonValue2);
 }
 
-TEST_F(JsonValueTests, CharPointersAreCopied)
+TEST_F(JsonValueTests, StringsAreCopiedByValue)
 {
     jsonValue1 = "hello";
     jsonValue2 = jsonValue1;
@@ -95,14 +95,27 @@ TEST_F(JsonValueTests, CharPointersAreCopied)
     EXPECT_STREQ("hello", (const char*) jsonValue2);
 }
 
-TEST_F(JsonValueTests, ObjectPointsAreCopied)
+
+TEST_F(JsonValueTests, ObjectsAreCopiedByReference)
 {
     JsonObject object = json.createObject();
 
     jsonValue1 = object;
     jsonValue2 = jsonValue1;
-    
+
     object["hello"] = "world";
 
+    EXPECT_EQ(1, ((JsonObject) jsonValue2).size());
+}
+
+TEST_F(JsonValueTests, ArraysAreCopiedByReference)
+{
+    JsonArray array = json.createArray();
+
+    jsonValue1 = array;
+    jsonValue2 = jsonValue1;
+    
+    array.add("world");
+
     EXPECT_EQ(1, ((JsonObject) jsonValue2).size());
 }