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Get nextvalue from enhanced.TableGenerator without save

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akiraly

Post subject: Get nextvalue from enhanced.TableGenerator without save

Posted: Fri Dec 07, 2007 9:20 am

Newbie

Joined: Fri Dec 07, 2007 5:52 am
Posts: 4
Location: Budapest, Hungary, EU

Hi!

Is there a way to get the next value from an org.hibernate.id.enhanced.TableGenerator for a specific sequence without saving an object to database?

I would like to use org.hibernate.id.enhanced.TableGenerator for several tables to generate keys, however I have a special case where I need unique id-s without immadiate save to the database. So in theory I will have a configured TableGenerator and the question is can I use that TableGenerator to generate values for me, like a sequence can?

I tried to look for some HQL support for this but did not find anything.

Thank you for the answers.

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akiraly

Post subject:

Posted: Sun Dec 09, 2007 12:35 pm

Newbie

Joined: Fri Dec 07, 2007 5:52 am
Posts: 4
Location: Budapest, Hungary, EU

After all I came up with the following (hibernate version 3.2.5GA).

Table01 is a class mapped to a database table. Its id generator is an enhanced.TableGenerator:

Code:

        <id name="id" type="long">
            <column name="id" />
            <generator class="org.hibernate.id.enhanced.TableGenerator">
               <param name="segment_value">seq_table01_id</param>
               <param name="initial_value">1</param>
               <param name="increment_size">10</param>
               <param name="optimizer">pooled</param>
            </generator>
        </id>

And the following code lets me generate id-s without an immadiate save. It has 3 unchecked casts but it works.