Extracting a common base class for JsonArray and JsonObject...

include/ArduinoJson/Internals/List.hpp

@@ -16,6 +16,7 @@ namespace Internals {
 template <typename T>
 class List {
  public:
+  typedef T value_type;
   typedef Node<T> node_type;
   typedef NodeIterator<T> iterator;
   typedef NodeConstIterator<T> const_iterator;
@@ -23,6 +24,7 @@ class List {
   List(JsonBuffer *buffer) : _buffer(buffer), _firstNode(NULL) {}
 
   bool success() const { return _buffer != NULL; }
+  int size() const;
 
   iterator begin() { return iterator(_firstNode); }
   iterator end() { return iterator(NULL); }

include/ArduinoJson/JsonArray.hpp

@@ -7,9 +7,7 @@
 #pragma once
 
 #include "Internals/JsonPrintable.hpp"
-#include "Internals/Node.hpp"
-#include "Internals/NodeConstIterator.hpp"
-#include "Internals/NodeIterator.hpp"
+#include "Internals/List.hpp"
 #include "Internals/ReferenceType.hpp"
 #include "JsonVariant.hpp"
 
@@ -22,19 +20,11 @@ class JsonObject;
 class JsonBuffer;
 
 class JsonArray : public Internals::JsonPrintable<JsonArray>,
-                  public Internals::ReferenceType {
+                  public Internals::ReferenceType,
+                  public Internals::List<JsonVariant> {
   friend class JsonBuffer;
 
  public:
-  typedef JsonVariant value_type;
-  typedef Internals::Node<JsonVariant> node_type;
-  typedef Internals::NodeIterator<JsonVariant> iterator;
-  typedef Internals::NodeConstIterator<JsonVariant> const_iterator;
-
-  int size() const;
-
-  bool success() { return _buffer != NULL; }
-
   value_type &operator[](int index) const { return at(index); }
   value_type &at(int index) const;
 
@@ -51,12 +41,6 @@ class JsonArray : public Internals::JsonPrintable<JsonArray>,
   JsonArray &createNestedArray();
   JsonObject &createNestedObject();
 
-  iterator begin() { return iterator(_firstNode); }
-  iterator end() { return iterator(NULL); }
-
-  const_iterator begin() const { return const_iterator(_firstNode); }
-  const_iterator end() const { return const_iterator(NULL); }
-
   static JsonArray &invalid() { return _invalid; }
 
   template <typename T>
@@ -64,13 +48,11 @@ class JsonArray : public Internals::JsonPrintable<JsonArray>,
 
  private:
   // constructor is private: instance must be created via a JsonBuffer
-  JsonArray(JsonBuffer *buffer) : _buffer(buffer), _firstNode(NULL) {}
+  JsonArray(JsonBuffer *buffer) : List(buffer) {}
 
   node_type *createNode();
   inline void addNode(node_type *node);
 
-  JsonBuffer *_buffer;
-  node_type *_firstNode;
   static JsonArray _invalid;
 };
 }

include/ArduinoJson/JsonObject.hpp

@@ -8,7 +8,6 @@
 
 #include "Internals/JsonPrintable.hpp"
 #include "Internals/List.hpp"
-#include "Internals/Node.hpp"
 #include "Internals/ReferenceType.hpp"
 #include "JsonPair.hpp"
 
@@ -29,8 +28,6 @@ class JsonObject : public Internals::JsonPrintable<JsonObject>,
   typedef const char *key_type;
   typedef JsonPair value_type;
 
-  int size() const;
-
   JsonVariant &at(key_type key);
   const JsonVariant &at(key_type key) const;
   JsonVariant &operator[](key_type key);

src/Internals/List.cpp

@@ -0,0 +1,23 @@
+// Copyright Benoit Blanchon 2014
+// MIT License
+//
+// Arduino JSON library
+// https://github.com/bblanchon/ArduinoJson
+
+#include "../../include/ArduinoJson/Internals/List.hpp"
+
+#include "../../include/ArduinoJson/JsonPair.hpp"
+#include "../../include/ArduinoJson/JsonVariant.hpp"
+
+using namespace ArduinoJson;
+using namespace ArduinoJson::Internals;
+
+template <typename T>
+int List<T>::size() const {
+  int nodeCount = 0;
+  for (node_type *node = _firstNode; node; node = node->next) nodeCount++;
+  return nodeCount;
+}
+
+template class List<JsonPair>;
+template class List<JsonVariant>;

src/JsonArray.cpp

@@ -16,12 +16,6 @@ using namespace ArduinoJson::Internals;
 
 JsonArray JsonArray::_invalid(NULL);
 
-int JsonArray::size() const {
-  int nodeCount = 0;
-  for (node_type *node = _firstNode; node; node = node->next) nodeCount++;
-  return nodeCount;
-}
-
 JsonVariant &JsonArray::at(int index) const {
   node_type *node = _firstNode;
   while (node && index--) node = node->next;

src/JsonObject.cpp

@@ -19,12 +19,6 @@ using namespace ArduinoJson::Internals;
 
 JsonObject JsonObject::_invalid(NULL);
 
-int JsonObject::size() const {
-  int nodeCount = 0;
-  for (node_type *node = _firstNode; node; node = node->next) nodeCount++;
-  return nodeCount;
-}
-
 JsonVariant &JsonObject::at(const char *key) {
   node_type *node = getNodeAt(key);
   return node ? node->content.value : JsonVariant::invalid();