Hi everyone, its my first time here and i have a problem while learning Hibernate:

My Class Article (not the full class though):



my mapping XML :



And i get this problem :



but when i Change the type to boolean then its no longer wrong.

Can someone explain why ? Thanks in advance !

You get that exception because Hibernate does not know how to handle BooleanProperty.

If you really want to store your entity like that, then you need to create a custom Type to handle the BooleanProperty. So, you have two options:

1. You can implement the UserType interface as explained in this article
2. You can use the AbstractSingleColumnStandardBasicType and provide a Java and a SQL descriptor as described in this article

Then, you will also have to annotate the type with the @Type annotation and provide the custom type class at the mapping level.

Hi vlad,

at first thanks for your answer. The reason i use xml mapping because in some tutorial its still used and am still learning :)

Is there any way to work around in this situation? i mean i still read the boolean value but from database in the moment the object is created it will run a function that convert this boolean into BooleanProperty ?

Is there anyway to do that with Hibernate ? I still have many value in database which needs to convert into my class-based-value, an easy example is like this :

A B

True True


But in my class you need to pass those boolean values to a function which returns a string ( this string is what i really need). Is there anyway to tell Hibernate to do that when it creates instances of my class ?

Thanks!

You can also use an AttributeConvertor. I guess it will address your use case.