diff --git a/ewol/resource/ColorFile.cpp b/ewol/resource/ColorFile.cpp
index 837b82af..1fc9869a 100644
--- a/ewol/resource/ColorFile.cpp
+++ b/ewol/resource/ColorFile.cpp
@@ -44,19 +44,19 @@ void ewol::resource::ColorFile::reload() {
 		EWOL_ERROR("Can not load file : '" << m_name << "' = " << etk::FSNode(m_name).getFileSystemName());
 		return;
 	}
-	std::shared_ptr<ejson::Array> baseArray = doc.getArray("color");
-	if (baseArray == nullptr) {
+	ejson::Array baseArray = doc["color"].toArray();
+	if (baseArray.exist() == false) {
 		EWOL_ERROR("Can not get basic array : 'color'");
 		return;
 	}
-	for (size_t iii = 0; iii < baseArray->size(); ++iii) {
-		std::shared_ptr<ejson::Object> tmpObj = baseArray->getObject(iii);
-		if (tmpObj == nullptr) {
-			EWOL_DEBUG(" can not get object in 'color' id=" << iii);
+	for (const auto it : baseArray) {
+		ejson::Object tmpObj = it.toObject();
+		if (tmpObj.exist() == false) {
+			EWOL_DEBUG(" can not get object in 'color' : " << it);
 			continue;
 		}
-		std::string name = tmpObj->getStringValue("name", "");
-		std::string color = tmpObj->getStringValue("color", m_errorColor.getHexString());
+		std::string name = tmpObj.getStringValue("name", "");
+		std::string color = tmpObj.getStringValue("color", m_errorColor.getHexString());
 		EWOL_DEBUG("find new color : '" << name << "' color='" << color << "'");
 		if (name.size() == 0) {
 			EWOL_ERROR("Drop an empty name");
diff --git a/ewol/resource/ConfigFile.cpp b/ewol/resource/ConfigFile.cpp
index d463cd4e..4914130c 100644
--- a/ewol/resource/ConfigFile.cpp
+++ b/ewol/resource/ConfigFile.cpp
@@ -36,14 +36,14 @@ void ewol::resource::ConfigFile::reload() {
 	std::unique_lock<std::recursive_mutex> lock(m_mutex);
 	// reset all parameters
 	for (int32_t iii=0; iii<m_list.size(); iii++){
-		if (nullptr != m_list[iii]) {
-			m_list[iii] = nullptr;
+		if (m_list[iii].exist() == true) {
+			m_list[iii] = ejson::empty();
 		}
 	}
 	m_doc.load(m_name);
 	
 	for (auto elementName : m_list.getKeys()) {
-		if (m_doc.exist(elementName) == true) {
+		if (m_doc[elementName].exist() == true) {
 			m_list[elementName] = m_doc[elementName];
 		}
 	}
@@ -54,9 +54,9 @@ int32_t ewol::resource::ConfigFile::request(const std::string& _paramName) {
 	std::unique_lock<std::recursive_mutex> lock(m_mutex);
 	// check if the parameters existed :
 	if (m_list.exist(_paramName) == false) {
-		m_list.add(_paramName, nullptr);
+		m_list.add(_paramName, ejson::empty());
 	}
-	if (m_doc.exist(_paramName) == true) {
+	if (m_doc[_paramName].exist() == true) {
 		m_list[_paramName] = m_doc[_paramName];
 	}
 	return m_list.getId(_paramName);
@@ -66,39 +66,27 @@ int32_t ewol::resource::ConfigFile::request(const std::string& _paramName) {
 double ewol::resource::ConfigFile::getNumber(int32_t _id) {
 	std::unique_lock<std::recursive_mutex> lock(m_mutex);
 	if (    _id < 0
-	     || m_list[_id] == nullptr) {
+	     || m_list[_id].exist() == false) {
 		return 0.0;
 	}
-	std::shared_ptr<ejson::Number> tmp = m_list[_id]->toNumber();
-	if (tmp == nullptr) {
-		return 0.0;
-	}
-	return tmp->get();
+	return m_list[_id].toNumber().get();
 }
 
 const std::string& ewol::resource::ConfigFile::getString(int32_t _id) {
 	std::unique_lock<std::recursive_mutex> lock(m_mutex);
 	static const std::string& errorString("");
 	if (    _id < 0
-	     || m_list[_id] == nullptr) {
+	     || m_list[_id].exist() == false) {
 		return errorString;
 	}
-	std::shared_ptr<ejson::String> tmp = m_list[_id]->toString();
-	if (tmp == nullptr) {
-		return errorString;
-	}
-	return tmp->get();
+	return m_list[_id].toString().get();
 }
 
 bool ewol::resource::ConfigFile::getBoolean(int32_t _id) {
 	std::unique_lock<std::recursive_mutex> lock(m_mutex);
 	if (    _id < 0
-	     || m_list[_id] == nullptr) {
+	     || m_list[_id].exist() == false) {
 		return false;
 	}
-	std::shared_ptr<ejson::Boolean> tmp = m_list[_id]->toBoolean();
-	if (tmp == nullptr) {
-		return false;
-	}
-	return tmp->get();
+	return m_list[_id].toBoolean().get();
 }
diff --git a/ewol/resource/ConfigFile.h b/ewol/resource/ConfigFile.h
index c3b1aeb6..ffa622a8 100644
--- a/ewol/resource/ConfigFile.h
+++ b/ewol/resource/ConfigFile.h
@@ -18,7 +18,7 @@ namespace ewol {
 		class ConfigFile : public gale::Resource {
 			private:
 				ejson::Document m_doc;
-				etk::Hash<std::shared_ptr<ejson::Value>> m_list;
+				etk::Hash<ejson::Value> m_list;
 			protected:
 				ConfigFile();
 				void init(const std::string& _filename);
diff --git a/ewol/resource/DistanceFieldFont.cpp b/ewol/resource/DistanceFieldFont.cpp
index 75de5243..183a740b 100644
--- a/ewol/resource/DistanceFieldFont.cpp
+++ b/ewol/resource/DistanceFieldFont.cpp
@@ -351,25 +351,18 @@ void ewol::resource::DistanceFieldFont::exportOnFile() {
 	std::unique_lock<std::recursive_mutex> lock(m_mutex);
 	EWOL_DEBUG("EXPORT: DistanceFieldFont : file : '" << m_fileName << ".json'");
 	ejson::Document doc;
-	std::shared_ptr<ejson::Array> tmpList = ejson::Array::create();
-	if (tmpList == nullptr) {
-		EWOL_ERROR("nullptr pointer");
-		return;
-	}
+	ejson::Array tmpList;
 	for (size_t iii=0; iii<m_listElement.size(); ++iii) {
-		std::shared_ptr<ejson::Object> tmpObj = ejson::Object::create();
-		if (tmpObj == nullptr) {
-			continue;
-		}
-		tmpObj->addString("m_UVal", etk::to_string(m_listElement[iii].m_UVal));
-		tmpObj->addNumber("m_glyphIndex", m_listElement[iii].m_glyphIndex);
-		tmpObj->addString("m_sizeTexture", (std::string)m_listElement[iii].m_sizeTexture);
-		tmpObj->addString("m_bearing", (std::string)m_listElement[iii].m_bearing);
-		tmpObj->addString("m_advance", (std::string)m_listElement[iii].m_advance);
-		tmpObj->addString("m_texturePosStart", (std::string)m_listElement[iii].m_texturePosStart);
-		tmpObj->addString("m_texturePosSize", (std::string)m_listElement[iii].m_texturePosSize);
-		tmpObj->addBoolean("m_exist", m_listElement[iii].m_exist);
-		tmpList->add(tmpObj);
+		ejson::Object tmpObj;
+		tmpObj.addString("m_UVal", etk::to_string(m_listElement[iii].m_UVal));
+		tmpObj.addNumber("m_glyphIndex", m_listElement[iii].m_glyphIndex);
+		tmpObj.addString("m_sizeTexture", (std::string)m_listElement[iii].m_sizeTexture);
+		tmpObj.addString("m_bearing", (std::string)m_listElement[iii].m_bearing);
+		tmpObj.addString("m_advance", (std::string)m_listElement[iii].m_advance);
+		tmpObj.addString("m_texturePosStart", (std::string)m_listElement[iii].m_texturePosStart);
+		tmpObj.addString("m_texturePosSize", (std::string)m_listElement[iii].m_texturePosSize);
+		tmpObj.addBoolean("m_exist", m_listElement[iii].m_exist);
+		tmpList.add(tmpObj);
 	}
 	doc.add("m_listElement", tmpList);
 	doc.addNumber("m_sizeRatio", m_sizeRatio);
@@ -401,26 +394,26 @@ bool ewol::resource::DistanceFieldFont::importFromFile() {
 	m_lastRawHeigh = doc.getNumberValue("m_lastRawHeigh", 0);
 	m_borderSize = doc.getNumberValue("m_borderSize", 2);
 	m_textureBorderSize = doc.addString("m_textureBorderSize", "0,0");
-	std::shared_ptr<ejson::Array> tmpList = doc.getArray("m_listElement");
-	if (tmpList == nullptr) {
+	ejson::Array tmpList = doc["m_listElement"].toArray();
+	if (tmpList.exist() == false) {
 		EWOL_ERROR("nullptr pointer array");
 		return false;
 	}
 	m_listElement.clear();
-	for (size_t iii=0; iii<tmpList->size(); ++iii) {
-		std::shared_ptr<ejson::Object> tmpObj = tmpList->getObject(iii);
-		if (tmpObj == nullptr) {
+	for (const auto it : tmpList) {
+		const ejson::Object tmpObj = it.toObject();
+		if (tmpObj.exist() == false) {
 			continue;
 		}
 		GlyphProperty prop;
-		prop.m_UVal = etk::string_to_int32_t(tmpObj->getStringValue("m_UVal", "0"));
-		prop.m_glyphIndex = tmpObj->getNumberValue("m_glyphIndex", 0);
-		prop.m_sizeTexture = tmpObj->getStringValue("m_sizeTexture", "0,0");
-		prop.m_bearing = tmpObj->getStringValue("m_bearing", "0,0");
-		prop.m_advance = tmpObj->getStringValue("m_advance", "0,0");
-		prop.m_texturePosStart = tmpObj->getStringValue("m_texturePosStart", "0,0");
-		prop.m_texturePosSize = tmpObj->getStringValue("m_texturePosSize", "0,0");
-		prop.m_exist = tmpObj->getBooleanValue("m_exist", false);
+		prop.m_UVal = etk::string_to_int32_t(tmpObj.getStringValue("m_UVal", "0"));
+		prop.m_glyphIndex = tmpObj.getNumberValue("m_glyphIndex", 0);
+		prop.m_sizeTexture = tmpObj.getStringValue("m_sizeTexture", "0,0");
+		prop.m_bearing = tmpObj.getStringValue("m_bearing", "0,0");
+		prop.m_advance = tmpObj.getStringValue("m_advance", "0,0");
+		prop.m_texturePosStart = tmpObj.getStringValue("m_texturePosStart", "0,0");
+		prop.m_texturePosSize = tmpObj.getStringValue("m_texturePosSize", "0,0");
+		prop.m_exist = tmpObj.getBooleanValue("m_exist", false);
 		m_listElement.push_back(prop);
 	}
 	egami::load(m_data, m_fileName + ".bmp");