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Monthly Archives: June 2010
JDO Typesafe Refactorable Queries
One of the primary drawbacks with current JDO queries is that they are string-based, so you are hardcoding field names etc. When you refactor a (model) class, the field names are left unchanged, so the query no longer works. Some … Continue reading
Posted in JDO, JDOQL
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Persisting multisets (bags) with DataNucleus
A multiset is a set where you can have a particular object multiple times in the set (a normal java.util Set will remove dups). This is also known by some as a “bag”. Google’s Collections library has such a container … Continue reading
Posted in JDO, JPA, Persistence
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