[jira] [Created] (ISIS-1051) Only call LayoutMetadataReaderFromJson on entities

["Dan Haywood (JIRA)" <ji...@apache.org>]

Dan Haywood created ISIS-1051:
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             Summary: Only call LayoutMetadataReaderFromJson on entities
                 Key: ISIS-1051
                 URL: https://issues.apache.org/jira/browse/ISIS-1051
             Project: Isis
          Issue Type: Improvement
    Affects Versions: core-1.7.0
            Reporter: Dan Haywood
            Assignee: Dan Haywood
             Fix For: core-1.9.0


Taken from a comment by Martin on ISIS-931:

While debugging ISIS-911 I've noticed that org.apache.isis.core.metamodel.layoutmetadata.json.LayoutMetadataReaderFromJson#asProperties is expensive. It is called at start time and tries to load .layout.json file for every introspected method. This includes JRE classes, JDO classes, and many more. I think it should be called only for objects/entities. The expensiveness is that it tries to find a file in the classpath and if it is not found then it throws org.apache.isis.core.metamodel.layoutmetadata.LayoutMetadataReader.ReaderException. The stacktrace of this exception is ignored at org.apache.isis.core.metamodel.specloader.specimpl.FacetedMethodsBuilder#readMetadataProperties so 
ReaderException could override java.lang.Throwable#fillInStackTrace() to return null and save some time.



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