[hibernate-dev] HSEARCH-1084 build failed

[Emmanuel Bernard]

To clarify, I think it works in our systems because we have 1.6.0_31 installed. I don't think it's related to Windows per se.

On 25 avr. 2012, at 00:17, Emmanuel Bernard wrote:

> Sanne caught that one recently but your bisect helped a lot.
> 
> It seems that we are a bit optimistic with out generic Russian dolls
> 
> http://stackoverflow.com/questions/2431334/java-generics-what-is-the-compilers-issue-here-no-unique-maximal-instance
> 
> 	/**
> 	 * Creates the proxy for an annotation using Hibernate Commons Annotations
> 	 * @param annotation the AnnotationDescriptor
> 	 * @return the proxy
> 	 */
> 	private static <T extends Annotation> T createAnnotation(AnnotationDescriptor annotation) {
> 		//This is a filthy workaround for the Annotations proxy generation,
> 		//which is using the ContextClassLoader to define the proxy classes
> 		//(not working fine in modular environments when Search is used by
> 		//other services such as CapeDwarf).
> 		//See HSEARCH-1084
> 
> 		//use annotation's own classloader
> 		try {
> 			return AnnotationFactory.create( annotation, annotation.type().getClassLoader() );
> 		}
> 		catch ( Exception e ) {
> 			//first try, but we have another trick
> 		}
> 		//Use TCCL
> 		return org.hibernate.annotations.common.annotationfactory.AnnotationFactory.create( annotation );
> 	}
> 
> Basically the compiler cannot guarantee that T in the outer method is the same as T in the AnnotationFactory.create methods. Unfortunately it yells in some strange language.
> It looks like the compiler is a bit more stupid on Windows for some obscure reason. Could you try 1.6.0_31 (the latest)?
> 
> On 24 avr. 2012, at 23:48, Nicolas Helleringer wrote:
> 
>> Hi all,
>> 
>> Fetching last master tonight I was not able to build :
>> 
>> [ERROR] Failed to execute goal
>> org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile
>> (default-compile) on project hibernate-search-engine: Compilation failure:
>> Compilation failure:
>> [ERROR]
>> \hibernate-search\hibernate-search-engine\src\main\java\org\hibernate\search\impl\MappingModelMetadataProvider.java:[251,34]
>> type parameters of <T>T cannot be determined; no unique maximal instance
>> exists for type variable T with upper bounds
>> T,java.lang.annotation.Annotation
>> [ERROR]
>> \hibernate-search\hibernate-search-engine\src\main\java\org\hibernate\search\impl\MappingModelMetadataProvider.java:[257,84]
>> type parameters of <T>T cannot be determined; no unique maximal instance
>> exists for type variable T with upper bounds
>> T,java.lang.annotation.Annotation
>> 
>> After a goo bisect it seems 31b485c1aaabd9b0ff178505067147e5628e3010 is the
>> first bad commit.
>> 
>> It is HSEARCH-1084 Annotation proxies created by Programmatic Mapping
>> 
>> I m still on windows 7 x64 with 1.6.0_24 jvm
>> 
>> Hope it helps.
>> 
>> Niko
>> _______________________________________________
>> hibernate-dev mailing list
>> hibernate-dev at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/hibernate-dev
> 
> 
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