java - Elegant way to handle upsert with Hibernate and MySQL -

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i'm working on batch import feature sits on top of hibernate , mysql. goal have upsert functionality several tables. i'm finding myself writing lot of code deal seeing if row exists key , branching right method. wondering if there might better way, i.e. analogous tools come sql-server ssis hibernate , mysql. tools or elegant solutions have used handle bulk upserts hibernate and/or mysql?

you might mysql's on duplicate key update feature:

http://dev.mysql.com/doc/refman/5.1/en/insert-on-duplicate.html


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