Hi Chakri,
Please make use of the concepts of field symbols for doing this.They can dynamically hold incoming values at runtime without any predefined types.
https://help.sap.com/saphelp_nw04/helpdata/en/fc/eb3860358411d1829f0000e829fbfe/content.htm
http://help.sap.com/abapdocu_70/en/ABAPFIELD-SYMBOLS.htm
Regards,
Kannan