Use improved API to find SMPP interface version in bind response

jsmpp/src/main/java/org/jsmpp/session/SMPPSession.java

@@ -45,15 +45,14 @@
 import org.jsmpp.bean.InterfaceVersion;
 import org.jsmpp.bean.NumberingPlanIndicator;
 import org.jsmpp.bean.OptionalParameter;
-import org.jsmpp.bean.OptionalParameter.Byte;
+import org.jsmpp.bean.OptionalParameter.Sc_interface_version;
 import org.jsmpp.bean.QuerySmResp;
 import org.jsmpp.bean.RegisteredDelivery;
 import org.jsmpp.bean.ReplaceIfPresentFlag;
 import org.jsmpp.bean.SubmitMultiResp;
 import org.jsmpp.bean.SubmitMultiResult;
 import org.jsmpp.bean.SubmitSmResp;
 import org.jsmpp.bean.TypeOfNumber;
-import org.jsmpp.bean.OptionalParameter.Tag;
 import org.jsmpp.extra.NegativeResponseException;
 import org.jsmpp.extra.PendingResponse;
 import org.jsmpp.extra.ProcessRequestException;
@@ -63,7 +62,6 @@
 import org.jsmpp.session.connection.ConnectionFactory;
 import org.jsmpp.session.connection.socket.SocketConnectionFactory;
 import org.jsmpp.util.DefaultComposer;
-import org.jsmpp.util.HexUtil;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -296,10 +294,9 @@ private String sendBind(BindType bindType, String systemId,
                 addrNpi, addressRange);
 
 	    BindResp resp = (BindResp)executeSendCommand(task, timeout);
-	    OptionalParameter.Byte sc_interface_version = (Byte) resp.getOptionalParameter(Tag.SC_INTERFACE_VERSION);
-	    if(sc_interface_version != null) {
-		    String sc_interface_version_hex = HexUtil.conventBytesToHexString(new byte[] {sc_interface_version.getValue()});
-		    logger.info("Other side reports smpp interface version {}", sc_interface_version_hex);
+	    OptionalParameter.Sc_interface_version sc_version = resp.getOptionalParameter(Sc_interface_version.class);
+	    if(sc_version != null) {
+		    logger.info("Other side reports smpp interface version {}", sc_version);
 	    }
 
 		return resp.getSystemId();