How to dynamic set messageInputText item data type?

Hi,
I have a LOV and other messageInputText items on the page. I need to be able to change the messageInputText item data type based on the value selected from LOV. How can I do that?
DD

1)Allow PPR on the item that receives the LOV values
2)Edit the VO query and create a SQL based column, which in turn will control the switcher. Something like –
decode(nvl(to_char(EmployeeEO.END_DATE), 'N'), 'N', 'DataType1', 'DataType2') AS DELETE_SWITCHER
3)Now add a switcher region with two cases in your page. Each case should represent the two possible values defined in the SQL based column ( “DataType1”, DataType2” in the above example).
4)Add two messageTextInput items under each case, but with different datatypes.

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