igarashitm commented on PR #17563:
URL: https://github.com/apache/camel/pull/17563#issuecomment-2751456079

   @davsclaus Thank you for the review! At first I wondered if fixed-format <-> 
XML fits to marshal/unmarshal as both are sort of marshalled data, but I tried 
and it has fit eventually - taking fixed-format as a marshalled data and XML 
DOM Document as an object.
   
   Now I hit an issue on the dataformat testcase, while `DfdlEndpoint` can 
resolve the schema file in the classpath in `doInit()`, `DfdlDataFormat` fails 
to resolve the schema file in `doInit()`. I also tried `doStart()` but it was a 
same error.
   
https://github.com/apache/camel/pull/17563/files#diff-c61d4f1299964f3aa480d87cf5760ed49dc2c7a9f4d83a8a91f3fa3710049271R85
   
   For some reason, `org.apache.camel.spi.Resource#getURI()` resolved with 
`ResourceHelper` returns `null`
   ```
   Caused by: java.lang.NullPointerException: Cannot invoke 
"java.net.URI.getScheme()" because "uri" is null
        at 
org.apache.daffodil.lib.util.Misc$.uriToDiagnosticFile(Misc.scala:729)
        at org.apache.daffodil.japi.Compiler.compileSource(Daffodil.scala:169)
        at org.apache.daffodil.japi.Compiler.compileSource(Daffodil.scala:156)
        at 
org.apache.camel.dataformat.dfdl.DfdlDataFormat.doInit(DfdlDataFormat.java:85)
   ```
   
   Is there any difference between Endpoint `doInit()` and DataFormat 
`doInit()` on resolving classpath resource?


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