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https://issues.apache.org/jira/browse/BATIK-1005?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15378980#comment-15378980
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Thomas Letsch commented on BATIK-1005:
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I have seen this problem(the PNG ImageWriter not being registered as
ImageWriter) also in the 1.8 version.
It however does not occur in the current 1.9 SNAPSHOT.
> maven batik-awt-util 1.7 missing META-INF/services/ file for
> ImageWriterRegistry?
> ---------------------------------------------------------------------------------
>
> Key: BATIK-1005
> URL: https://issues.apache.org/jira/browse/BATIK-1005
> Project: Batik
> Issue Type: Bug
> Components: Utilities
> Affects Versions: 1.7
> Environment: Operating System: All
> Platform: Macintosh
> Reporter: Jessica
> Assignee: Batik Developer's Mailing list
>
> When we switched our project to maven, we started seeing a null pointer
> exception coming from the JPEGTranscoder, line 89. The exception happens
> because the singleton org.apache.batik.ext.awt.image.spi.ImageWriterRegistry
> instance does not have any ImageWriters registered so null is returned
> instead of a JPEGImageWriter instance.
> Looking at the code for the ImageWriterRegistry class, I think there should
> be a file called "org.apache.batik.ext.awt.image.spi.ImageWriter" inside of
> META-INF/services/ in the distributed jar which lists the image writers to
> register during setup. However, there is no such file in the
> batik-awt-util-1.7.jar.
> I do see a file in xmlgraphics-commons jar for the
> org.apache.xmlgraphics.image.writer.ImageWriter class, but the JPEGTranscoder
> doesn't use the registry from that package.
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