Extracted base class JsonObjectBase

JsonGeneratorTests/JsonArray.h

@@ -5,33 +5,12 @@
 
 #pragma once
 
+#include "JsonObjectBase.h"
 #include "StringBuilder.h"
 
-enum JsonObjectType
-{
-    JSON_STRING,
-    JSON_NUMBER,
-    JSON_BOOLEAN,
-};
-
-union JsonObjectValue
-{
-    const char* string;
-    double      number;
-    bool        boolean;
-};
-
-struct JsonObject
-{
-    JsonObjectType type;
-    JsonObjectValue value;
-};
-
 template<int N>
-class JsonArray
+class JsonArray : public JsonObjectBase
 {
-    
-
 public:
     JsonArray()
     {
@@ -69,34 +48,14 @@ private:
     JsonObject items[N];
     int itemCount;
 
-    void writeTo(StringBuilder& sb)
+    virtual void writeTo(StringBuilder& sb)
     {
         sb.append("[");
 
         for (int i = 0; i < itemCount; i++)
         {
-            if (i>0)
-                sb.append(",");
-
-            JsonObjectValue value = items[i].value;
-
-            switch (items[i].type)
-            {
-            case JSON_STRING:
-                if (value.string)
-                    sb.append("\"%s\"", value.string);
-                else
-                    sb.append("null");
-                break;
-
-            case JSON_NUMBER:
-                sb.append("%lg", value.number);
-                break;
-
-            case JSON_BOOLEAN:
-                sb.append(value.boolean ? "true" : "false");
-                break;
-            }
+            if (i>0) sb.append(",");
+            writeObjectTo(items[i], sb);
         }
 
         sb.append("]");

JsonGeneratorTests/JsonGeneratorTests.vcxproj

@@ -84,10 +84,12 @@
   <ItemGroup>
     <ClCompile Include="JsonArray.cpp" />
     <ClCompile Include="JsonArrayTests.cpp" />
+    <ClCompile Include="JsonObjectBase.cpp" />
     <ClCompile Include="StringBuilder.cpp" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="JsonArray.h" />
+    <ClInclude Include="JsonObjectBase.h" />
     <ClInclude Include="StringBuilder.h" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />

JsonGeneratorTests/JsonGeneratorTests.vcxproj.filters

@@ -24,6 +24,9 @@
     <ClCompile Include="StringBuilder.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="JsonObjectBase.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="JsonArray.h">
@@ -32,5 +35,8 @@
     <ClInclude Include="StringBuilder.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="JsonObjectBase.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>

JsonGeneratorTests/JsonObjectBase.cpp

@@ -0,0 +1 @@
+#include "JsonObjectBase.h"

JsonGeneratorTests/JsonObjectBase.h

@@ -0,0 +1,60 @@
+/*
+ * Arduino JSON library
+ * Benoit Blanchon 2014 - MIT License
+ */
+
+#pragma once
+
+#include "StringBuilder.h"
+
+class JsonObjectBase
+{
+public:
+
+
+protected:
+
+    virtual void writeTo(StringBuilder& sb) = 0;
+
+    enum JsonObjectType
+    {
+        JSON_STRING,
+        JSON_NUMBER,
+        JSON_BOOLEAN,
+    };
+
+    union JsonObjectValue
+    {
+        const char* string;
+        double      number;
+        bool        boolean;
+    };
+
+    struct JsonObject
+    {
+        JsonObjectType type;
+        JsonObjectValue value;
+    };
+
+    void writeObjectTo(const JsonObject& obj, StringBuilder& sb)
+    {
+        switch (obj.type)
+        {
+        case JSON_STRING:
+            if (obj.value.string)
+                sb.append("\"%s\"", obj.value.string);
+            else
+                sb.append("null");
+            break;
+
+        case JSON_NUMBER:
+            sb.append("%lg", obj.value.number);
+            break;
+
+        case JSON_BOOLEAN:
+            sb.append(obj.value.boolean ? "true" : "false");
+            break;
+        }
+    }
+};
+