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https://issues.apache.org/activemq/browse/CAMEL-2167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=56076#action_56076
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Barry Kaplan edited comment on CAMEL-2167 at 11/24/09 7:09 PM:
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Ah, well looks like its more java generics foo. Likely the self referentials,
eg: "class ProcessorDefinition<Type extends
org.apache.camel.model.ProcessorDefinition>".
This going to be a slog. Here is one example:
{code}
public abstract class OptionalIdentifiedDefinition<T extends
OptionalIdentifiedDefinition> {..}
public abstract class ProcessorDefinition<Type extends ProcessorDefinition>
extends OptionalIdentifiedDefinition implements Block {..}
{code}
The above compiles fine with just javac. But when scalac see's this (when
trying to compile scala) it complains that ProcessorDefinition does not provide
the type argument for OptionalIdentifiedDefinition. I only found this by
extracting out just the type declarations into a separate project. In that
small project scalac did not crash but provided the error message. In the
camel-scala project scalac just barfs.
_rant begin_ I hate java generics. I hate java. After a couple years of only
scala, groovy, ruby, and c# I had forgotten what an archaic, noisy language
java is. _rant end_
was (Author: memelet):
Ah, well looks like its more java generics foo. Likely the self
referentials, eg: "class ProcessorDefinition<Type extends
org.apache.camel.model.ProcessorDefinition>".
> Upgrade camel-scala to scala 2.8
> --------------------------------
>
> Key: CAMEL-2167
> URL: https://issues.apache.org/activemq/browse/CAMEL-2167
> Project: Apache Camel
> Issue Type: Improvement
> Components: camel-scala
> Affects Versions: 2.0.0
> Reporter: Barry Kaplan
> Assignee: Hadrian Zbarcea
> Fix For: 2.2.0, 2.3.0
>
> Attachments: Upgrade_to_scala_2_8.patch
>
>
> The attached patch upgrades to 2.8.0-SNAPSHOT (actually a specific version,
> but pretty close to today).
> Only a few changes were required:
> - Change package declarations to new 2.8 style that allows relative imports
> - Change org.apache.camel.scala.conveters.ScalaTypeConverter from a
> singleton object to a class. Otherwise ObjectHelper failed to instantiate the
> converter due to private access. (This could be 2.8 bug. I will need to raise
> an issue.)
> - Removed generic parameters on references to java classes that were not
> generic. Don't know why this compiled with scala 2.7.
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