diff -r 9e16e31fa756 -r 0890135ff1f7 src/SerializeHandler.h
--- a/src/SerializeHandler.h	Tue Apr 19 21:00:07 2022 +0200
+++ b/src/SerializeHandler.h	Thu Apr 21 00:18:10 2022 +0200
@@ -32,6 +32,7 @@
 #include <relpipe/cli/RelpipeCLIException.h>
 
 #include "Configuration.h"
+#include "Hex.h"
 
 namespace relpipe {
 namespace tr {
@@ -57,13 +58,6 @@
 		size_t attributeIndex = 0;
 	} recordContext;
 
-	relpipe::common::type::StringX toHex(const std::string& octets) {
-		std::stringstream hex;
-		hex << std::hex << std::setfill('0') << std::hex;
-		for (size_t i = 0, size = octets.size(); i < size; i++) hex << std::setw(2) << (0xff & octets[i]);
-		return convertor.from_bytes(hex.str());
-	}
-
 public:
 
 	SerializeHandler(shared_ptr<relpipe::writer::RelationalWriter> writer, Configuration configuration) : writer(writer), configuration(configuration) {
@@ -103,7 +97,7 @@
 		recordContext.attributeIndex++;
 
 		if (recordContext.attributeIndex % relationContext.readerMetadata.size() == 0) {
-			writer->writeAttribute(toHex(recordContext.buffer.str()));
+			writer->writeAttribute(Hex::toHex(recordContext.buffer.str()));
 			recordContext.attributeIndex = 0;
 		}
 	}