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From "Simone Gianni (JIRA)" <j...@apache.org>
Subject [jira] Created: (COCOON-1961) Cocoon deployer plugin given null pointer cause of maven limitations on subclassing
Date Mon, 04 Dec 2006 02:06:20 GMT
Cocoon deployer plugin given null pointer cause of maven limitations on subclassing
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                 Key: COCOON-1961
                 URL: http://issues.apache.org/jira/browse/COCOON-1961
             Project: Cocoon
          Issue Type: Bug
          Components: - Build System: Maven
    Affects Versions: 2.2-dev (Current SVN)
            Reporter: Simone Gianni
            Priority: Blocker


Currently, trying to build (mvn package for example) a dist, throws a null pointer exception.
Stack trace follows.

The problem is that the property archiverManager of AbstractWarMojo is null. The problem is
simply summarized here : http://www.mail-archive.com/dev@maven.apache.org/msg60770.html ,
a mojo should not subclass another mojo cause the super one will not be inited by maven. 

In that mail is written "You'll need to redefine that parameter if you want to use it in the
xdoclet [subclass] plugin". Don't know exactly what this means, cause redefining a private
field will not fill the super one and AFAIK there is no way to define a maven @parameter not
associated to a declared field.

I've opened an issue on maven jira about subdividing the WAR plugin in separate goals, so
that it will be possible to write plugins that operates on the WAR directory structure, and
stack them in the package lifecycle phase in an order like "war:prepare, cocoon:deploy, what:else,
war:package". This is http://jira.codehaus.org/browse/MWAR-86 . 

I will try to modify the war plugin this way, and test it with a mock plugin. In case someone
manages to have it working, then we could rewrite the cocoon deployer in a way that does not
subclass the war mojo, but only operates on the war directory structure.

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