buildnumber plugin problem: Class cast exception when doUpdate is true
----------------------------------------------------------------------
Key: MOJO-1404
URL: http://jira.codehaus.org/browse/MOJO-1404
Project: Mojo
Issue Type: Bug
Components: buildnumber
Affects Versions: buildnumber-maven-plugin-1.0-beta-3
Environment: Maven 2.0.9 on either Windows or Mac OSX
Reporter: Pat Podenski
For a simple Maven project when the build number plugin is configured so that
doUpdate is true and the javasvn provider is specified, the build fails with a
class cast exception.
The configuration for build number plugin is as follows:
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>buildnumber-maven-plugin</artifactId>
<version>1.0-beta-3</version>
<dependencies>
<dependency>
<groupId>com.sun.jna</groupId>
<artifactId>jna</artifactId>
<version>3.0.1</version>
</dependency>
</dependencies>
<executions>
<execution>
<phase>validate</phase>
<goals>
<goal>create</goal>
</goals>
</execution>
</executions>
<configuration>
<doCheck>true</doCheck>
<doUpdate>true</doUpdate>
<providerImplementations>
<svn>javasvn</svn>
</providerImplementations>
</configuration>
</plugin>
This is the class cast exception that results when doUpdate is true:
[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] org.apache.maven.scm.command.update.UpdateScmResult
[INFO] ------------------------------------------------------------------------
[INFO] Trace
java.lang.ClassCastException:
org.apache.maven.scm.command.update.UpdateScmResult
at org.codehaus.mojo.build.CreateMojo.update(CreateMojo.java:528)
at org.codehaus.mojo.build.CreateMojo.execute(CreateMojo.java:398)
at
org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:451)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:558)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:499)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:478)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:330)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:291)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:142)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:336)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:287)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
[INFO] ------------------------------------------------------------------------
If I set doUpdate to false, the build succeeds and the Subversion revision
number is correctly placed in jar manifest file (using jar plugin).
I took a look at the source code for the build number plugin and I didn't see
how the UpdateScmResult can get instantiated as a UpdateScmResultWithRevision.
This would of course be essential if the class cast (on line 528) is to succeed
in the following lines of code (526 - 531) from the CreateMojo:
if ( scmProvider instanceof AbstractSvnScmProvider )
{
String revision = ( (UpdateScmResultWithRevision) result
).getRevision();
getLog().info( "Got a revision during update: " + revision );
this.revision = revision;
}
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