Maven Ant Task problem when used with Ant 1.7.0

Wed, 10 Jan 2007 10:55:01 -0800 

Hi,
I have submitted the following problem to the Maven mailing list which redirected me to this Ant mailing list. 

The problem occurs when I use the maven ant task 2.0.4 with Ant 1.7.0.

The fileset created by the <maven:dependencies> task raises a 
NullPointerException when used in the Ant <pathconvert> task.


The following code :


       <!-- The Artifact to be looked for with the maven dependencies 
task -->

       <property name="artifact.groupid" value="junit"/>

       <property name="artifact.id" value="junit"/>               
       <property name="artifact.version" value="3.8.1"/>


      <!-- Try retrieving the artifact as a fileset -->
       <maven:dependencies filesetId="dependency.files">
           <dependency groupId="${artifact.groupid}"
               artifactId="${artifact.id}"

               version="${artifact.version}"/>                   
</maven:dependencies>      
       <!-- The following does not fail, showing that a fileset 
reference has

            actually been defined -->

       <fail message="Reference 'dependency.files' has not been set or 
is not a fileset reference.">

           <condition>

               <not><isreference refid="dependency.files" 
type="fileset"/></not>

           </condition>
       </fail>
       <!-- But the following task throws a NullPointerException -->

       <pathconvert property="echo.dependency.files" 
refid="dependency.files"/>


Raises the following NullPointerException:

java.lang.NullPointerException

       at 
org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:115)

       at org.apache.tools.ant.Task.perform(Task.java:348)
       at org.apache.tools.ant.Target.execute(Target.java:357)
       at org.apache.tools.ant.Target.performTasks(Target.java:385)

       at 
org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329)

       at org.apache.tools.ant.Project.executeTarget(Project.java:1298)

       at 
org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)

       at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
       at org.apache.tools.ant.Main.runBuild(Main.java:698)
       at org.apache.tools.ant.Main.startAnt(Main.java:199)
       at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
       at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)
Caused by: java.lang.NullPointerException

       at 
org.apache.tools.ant.types.AbstractFileSet.setupDirectoryScanner(AbstractFileSet.java:464)
       at 
org.apache.tools.ant.types.AbstractFileSet.getDirectoryScanner(AbstractFileSet.java:430)

       at org.apache.tools.ant.types.FileSet.iterator(FileSet.java:69)

       at 
org.apache.tools.ant.types.resources.Union.getCollection(Union.java:105)

       at org.apache.tools.ant.types.resources.Union.list(Union.java:67)

       at 
org.apache.tools.ant.taskdefs.PathConvert.execute(PathConvert.java:339)
       at 
org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)

       at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)

       at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

       at java.lang.reflect.Method.invoke(Method.java:585)

       at 
org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105)

       ... 11 more
--- Nested Exception ---
java.lang.NullPointerException

       at 
org.apache.tools.ant.types.AbstractFileSet.setupDirectoryScanner(AbstractFileSet.java:464)
       at 
org.apache.tools.ant.types.AbstractFileSet.getDirectoryScanner(AbstractFileSet.java:430)

       at org.apache.tools.ant.types.FileSet.iterator(FileSet.java:69)

       at 
org.apache.tools.ant.types.resources.Union.getCollection(Union.java:105)

       at org.apache.tools.ant.types.resources.Union.list(Union.java:67)

       at 
org.apache.tools.ant.taskdefs.PathConvert.execute(PathConvert.java:339)
       at 
org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)

       at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)

       at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

       at java.lang.reflect.Method.invoke(Method.java:585)

       at 
org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105)

       at org.apache.tools.ant.Task.perform(Task.java:348)
       at org.apache.tools.ant.Target.execute(Target.java:357)
       at org.apache.tools.ant.Target.performTasks(Target.java:385)

       at 
org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329)

       at org.apache.tools.ant.Project.executeTarget(Project.java:1298)

       at 
org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)

       at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
       at org.apache.tools.ant.Main.runBuild(Main.java:698)
       at org.apache.tools.ant.Main.startAnt(Main.java:199)
       at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
       at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)

Any idea if this is an incompatibility introduced with Ant 1.7.0 ?

Thanks

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