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How can I use user defined wrap function or unwrapped method in Oracle? Because default wrapping code is can be unwrapped.
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You can wrap PL/SQL source code with either the wrap utility or DBMS_DDL subprograms. The wrap utility wraps a single source file, such as a SQL*Plus script. The DBMS_DDL subprograms wrap a single dynamically generated PL/SQL unit, such as a single CREATE PROCEDURE statement.
Configure > Preferences > User Interface - Editor > Tabs & Wrapping - Wrap lines.
The wrap utility is a command line utility that obfuscates the contents of a PL/SQL source file. The syntax for the wrap utility is shown below. wrap iname=input_file [oname=output_file] The iname parameter specifies the source file, while the oname parameter specifies the destination file.
Use the wrapped procedure the same way that you use an unwrapped procedure. Call it from SQL or PL/SQL. Wrapping has no effect on calling the run-time behaviour of the stored procedure. The procedure is still in ALL_OBJECTS and its parameters are still in ALL_ARGUMENTS.
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Oracle's documentation says:
Wrapping a PL/SQL unit prevents most users from examining the source code, but might not stop all of them.
If you read Pete Finnigan's analyis of the wrapping mechanism, the wrapped code is just an encoding of the DIANA or Interface Description Languange (IDL) version of your source code. I don't see any way how you can change the wrapping mechanism and still be valid IDL.
After unwrapping, I normally give up if the PL/SQL package calls C functions. So you might try writing C libraries. They seem to be much harder to re-engineer...
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