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Posted to user@ant.apache.org by James Huang <ju...@hotmail.com> on 2004/08/07 20:53:14 UTC
Help: NPE from DefBase.java
This test program fails with Ant-1.6.2 but works with Ant-1.5.4:
8< ------------------------------------------------------
import org.apache.tools.ant.*;
public class AntTest
{
public static void main(String args[]) {
try {
Project proj = new Project();
proj.init();
proj.addBuildListener(new DefaultLogger());
Task task = proj.createTask("taskdef");
IntrospectionHelper helper =
IntrospectionHelper.getHelper(task.getClass());
helper.setAttribute(proj, task, "name", "judo");
helper.setAttribute(proj, task, "classname",
"com.judoscript.AntJudoScriptTask");
task.execute();
} catch(Exception e) {
e.printStackTrace();
}
}
}
------------------------------------------------------ >8
java.lang.NullPointerException
at
org.apache.tools.ant.taskdefs.DefBase.createLoader(DefBase.java:132)
at org.apache.tools.ant.taskdefs.Definer.execute(Definer.java:169)
at AntTest.main(AntTest.java:17)
In DefBase.java:
protected ClassLoader createLoader() {
if (getAntlibClassLoader() != null) {
return getAntlibClassLoader();
}
if (createdLoader == null) {
createdLoader = this.cpDelegate.getClassLoader(); <-- line 132
However, the build.xml works with both Ant-1.6.2/1.5.4:
<project>
<taskdef name="judo" classname="com.judoscript.AntJudoScriptTask"/>
</project>
I don't know if it's a bug or something extra I need to do in 1.6.2. Please
advise.
Thanks,
-James
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