ComponentDescriptor source
--------------------------
Key: MNG-376
URL: http://jira.codehaus.org/browse/MNG-376
Project: m2
Type: Improvement
Components: maven-core
Environment: all (linux/jdk1.5)
Reporter: Brett Porter
Priority: Minor
Fix For: 2.0-alpha-2
I got the following error
java.lang.IllegalStateException: Plugin descriptor ID incomplete: null:null:null
at
org.apache.maven.plugin.descriptor.PluginDescriptor.getId(PluginDescriptor.java:112)
at
org.apache.maven.plugin.DefaultPluginManager.componentDiscovered(DefaultPluginManager.java:129)
....
I fixed the errormessage to include the location of the Plugin Descriptor
plugin.xml file.
To do that, I had to modify PluginDescriptor to add a 'source' attribute;
modify maven-core's
MavenPluginDiscoverer to not disregard the source parameter and pass it on to
maven-plugin-descriptor's
PluginDescriptorBuilder (retaining backwards compatiblity) and set it there.
Now the errormessage looks like:
java.lang.IllegalStateException: Plugin descriptor ID incomplete:
null:null:null in
jar:file:/home/forge/.m2/repository/org/apache/maven/plugins/maven-war-plugin/1.0-SNAPSHOT/maven-war-plugin-1.0-20050405.162144-1.jar!/META-INF/maven/plugin.xml
at
org.apache.maven.plugin.descriptor.PluginDescriptor.getId(PluginDescriptor.java:112)
at
org.apache.maven.plugin.DefaultPluginManager.componentDiscovered(DefaultPluginManager.java:130)
which is a lot more helpful to me.
I thought I'd share this with you, hoping you'll find it useful enough to
incorporate it.
By the way, this exception is triggered in a new NullpointerException (in
DefaultPluginManager)
warning about the PluginDescriptor's version being null; while constructing
this message another
exception is triggered, so the original error doesn't get through at all.
For the record, I tried to enhance Plexus' ComponentSetDescriptor, but found I
could only access
the source (parameter) in 2 out of 5 places without API modification, so I
abandoned this approach,
but it might prove wise to include the source there, rather than in the special
case of maven's PluginManager.
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