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https://issues.apache.org/jira/browse/JDO-652?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16702351#comment-16702351
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Tilmann Zäschke commented on JDO-652:
-------------------------------------
I simplified the problem a bit: Creating a simple class such as
{code:java}
package org.apache.jdo.tck.pc.query;
import java.util.Optional;
import javax.jdo.annotations.PersistenceCapable;
@PersistenceCapable
public class OptionalSample2 {
long id;
Optional<String> optionalString;
}{code}
will cause {{mvn clean install}} to fail:
{code:java}
[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile (default-compile)
on project jdo-tck: Compilation failure: Compilation failure:
[ERROR]
\projects\workspace-zoo\JDO-trunk-commit\trunk\tck\target\generated-sources\annotations\org\apache\jdo\tck\pc\query\QOptionalSample2.java:[39,74]
error: cannot find symbol
[ERROR]
\projects\workspace-zoo\JDO-trunk-commit\trunk\tck\target\generated-sources\annotations\org\apache\jdo\tck\pc\query\QOptionalSample2.java:[46,74]
error: cannot find symbol{code}
@[~andy]: This appears to be a problem with Datanucleus (5.2.0-m2 /
dn-jdo-query-5.0.9). Would you mind having a look?
> 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-ifTheElse.txt, JDO-652-api-patch-Andy.txt,
> JDO-652-patch4.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
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