Does anyone know how to change the default mapping that middlegen uses while reading database schemas to generate hibernate ( *.hbm.xml) files.

I am using middlegen to connect to a oracle database and middlegen seems to map columns of Float datatype in the database to type Object in the hbm.xml files. Similarly for Oracle column type Number it is converting into Big Decimal. Also, Oracle column type Date is mapped into Timestamp.

Can these preferences be changed via a config file or in some other place?
Any help in this will be highly appreciated.

When you launch Middlegen you are shown a GUI with 'Generate' button on it. One of the panels is hidden by default. You can expose it manually by resizing the lower panel. In the upper panel you can choose the options you want like choosing variable type from a drop down box.

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In addition to the GUI being used to change the types. You can code your own type mapper so that you can get the default types created the way you want them to be created. Also, you can edit the preferences file and change the types there as well.

BTW: R5 fixed the hidden db panel issue.