[jira] [Commented] (GERONIMO-6484) Activation 1.1 spec: NullPointerException in MimetypesFileTypeMap

["Bert Jacobs (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/GERONIMO-6484?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13713707#comment-13713707 ] 

Bert Jacobs commented on GERONIMO-6484:
---------------------------------------

As to the cause; the code contains the following:
{code}
            ClassLoader cl = MimetypesFileTypeMap.class.getClassLoader();
{code}
In special cases like the one I use (a jar in an endorsed dir) {{getClassLoader()}} returns {{null}} because the class was loaded by the JVM classloader.

To fix this problem, check if the classloader is null. If so, use {{Classloader.getSystemClassloader()}} instead.
                
> Activation 1.1 spec: NullPointerException in MimetypesFileTypeMap
> -----------------------------------------------------------------
>
>                 Key: GERONIMO-6484
>                 URL: https://issues.apache.org/jira/browse/GERONIMO-6484
>             Project: Geronimo
>          Issue Type: Bug
>      Security Level: public(Regular issues) 
>          Components: specs
>            Reporter: Bert Jacobs
>
> I'm using Karaf 2.3.2.
> The endorsed directory contains the ServiceMix org.apache.servicemix.specs.jaxb-api-2.2-2.2.0 bundle which in turn includes a shaded version of geronimo-activation_1.1_spec version 1.0.2.
> My code uses a FileDataSource, requests the content type and receives this:
> {noformat}
> Caused by: java.lang.NullPointerException
> 	at javax.activation.MimetypesFileTypeMap.<init>(MimetypesFileTypeMap.java:62)[:2.2.0]
> 	at javax.activation.FileTypeMap.getDefaultFileTypeMap(FileTypeMap.java:53)[:2.2.0]
> 	at javax.activation.FileDataSource.getContentType(FileDataSource.java:69)[:2.2.0]
> {noformat}

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