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Andy Jefferson commented on JDO-652: ------------------------------------ See [https://github.com/datanucleus/javax.jdo/commit/34129e8c995db533545a1e882823edffd0a4c204] for a prototype of If-Else handling. This means that you can write such as the following {{ JDOQLTypedQuery<Person> tq = pm.newJDOQLTypedQuery(Person.class);}} {{ QPerson cand = QPerson.jdoCandidate;}} {{ IfElseExpression<String> ageGroupExpr = tq.ifElseExpression(String.class);}} {{ ageGroupExpr.ifThen(cand.age.lt(21), "Student");}} {{ ageGroupExpr.ifThen(cand.age.ge(21).and(cand.age.lt(65)), "Worker");}} {{ ageGroupExpr.elseEnd("Retired");}} {{ tq.result(false, ageGroupExpr);}} > Provision of a typesafe refactor-friendly query capability for JDOQL > -------------------------------------------------------------------- > > Key: JDO-652 > URL: https://issues.apache.org/jira/browse/JDO-652 > Project: JDO > Issue Type: New Feature > Components: api, specification, tck > Reporter: Andy Jefferson > Assignee: Michael Bouschen > Priority: Major > Fix For: JDO 3.2 > > Attachments: JDO-652-api-patch-Andy.txt, JDO-652-patch3.txt, > typesafe.patch, typesafe_manifest.patch > > > There are various querying capabilities of this type around. JPA2 has its > Criteria query API. Third party solutions like QueryDSL also exist, in its > case providing a JDOQL implementation (as well as JPQL, and HQL). We should > seriously consider introducing something along these lines in the JDO2.4 > timeframe. > There is a comparison of JPA Criteria with QueryDSL over at > http://source.mysema.com/forum/mvnforum/viewthread_thread,49 -- This message was sent by Atlassian JIRA (v7.6.3#76005)