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From "tharanga wijethilake" <thara...@ee.oulu.fi>
Subject Re: How to resolve a NullPointerException
Date Fri, 27 Oct 2006 07:41:54 GMT
Hi,
I am running the following code to run this ant file. 
private void antRun(){

File buildFile = new File("C:\\Documents and Settings\\tharanga\\My Documents\\IBM\\wssitedev51\\workspace\\BundleDeployer\\build.xml");


if(buildFile.exists()){

Project p = new Project();

p.setUserProperty("ant.file", buildFile.getAbsolutePath());

DefaultLogger consoleLogger = new DefaultLogger();

consoleLogger.setErrorPrintStream(System.err);

consoleLogger.setOutputPrintStream(System.out);

consoleLogger.setMessageOutputLevel(Project.MSG_DEBUG);

p.addBuildListener(consoleLogger);

try {

p.fireBuildStarted(); 

p.init();

ProjectHelper helper = ProjectHelper.getProjectHelper();

p.addReference("ant.projectHelper", helper);

helper.parse(p, buildFile); 

p.executeTarget(p.getDefaultTarget());

}

catch (BuildException e) {

p.fireBuildFinished(e);

}

} else {

System.out.println(buildFile.getAbsolutePath()+" does not exists");

} 

After the verbose mode I recived the stacktrace as follows.
BUILD FAILED

C:\Documents and Settings\tharanga\My Documents\IBM\wssitedev51\workspace\BundleDeployer\build.xml:19:
java.lang.NullPointerException

at org.apache.tools.ant.Task.perform(Task.java:373)

at org.apache.tools.ant.Target.execute(Target.java:341)

at org.apache.tools.ant.Target.performTasks(Target.java:369)

at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1216)

at org.apache.tools.ant.Project.executeTarget(Project.java:1185)

at oulu.info.test.Runner.antRun(Runner.java:52)

at oulu.info.test.Runner.run(Runner.java:67)

at java.lang.Thread.run(Thread.java:513)

--- Nested Exception ---

java.lang.NullPointerException

at com.ibm.ive.eccomm.bde.tooling.SourceBundle.getStagingDirectory(SourceBundle.java:54)

at com.ibm.ive.eccomm.bde.ui.tooling.ant.SubmitBundle.execute(SubmitBundle.java:57)

at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)

at org.apache.tools.ant.Task.perform(Task.java:364)

at org.apache.tools.ant.Target.execute(Target.java:341)

at org.apache.tools.ant.Target.performTasks(Target.java:369)

at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1216)

at org.apache.tools.ant.Project.executeTarget(Project.java:1185)

at oulu.info.test.Runner.antRun(Runner.java:52)

at oulu.info.test.Runner.run(Runner.java:67)

at java.lang.Thread.run(Thread.java:513)

Total time: 8 seconds



Hello,

how do you run this programmatically ?

one common source of null pointer exceptions in Ant API use is to forget to set 
a project reference on task objects or datatypes. The null pointer exception 
happens then as soon as the task or the datatype tries to log something.

if you have a NPE when using command line Ant, run 

ant -verbose

(-verbose is a command line argument)

this will give you a stack trace.

Regards,

Antoine
-------- Original-Nachricht --------
Datum: Mon, 16 Oct 2006 17:41:07 +0300
Von: "tharanga wijethilake" <[EMAIL PROTECTED]>
An: "Ant Users List" <user@ant.apache.org>
Betreff: How to resolve a NullPointerException

> Hi all,
> I am tring to run this Ant file using a java program. 
> When I run this using "Ant run" option provided in eclipse it runs with
> out any trouble. 
> <project name="bundleRunner" default="submit_a_bundle" basedir=".">
> 
> <property name="ant.classpath" location="lib"/>
> 
> <taskdef name="smfbd.submitJarBundle"
> classname="com.ibm.ive.eccomm.bde.ui.tooling.ant.SubmitJarBundle"> 
> 
> <classpath>
> 
> <fileset dir="lib">
> 
> <include name="${ant.classpath}/smfbdTasks.jar"/>
> 
> <include name="${ant.classpath}/bde.jar"/>
> 
> </fileset> 
> 
> </classpath>
> 
> </taskdef>
> 
> <target name="submit_a_bundle"> 
> 
> <smfbd.submitJarBundle bundlepath="/HelloWorld" replace="true">
> 
> <bundleserver host="localhost" user="Admin" password="Admin" port="8080"
> webapp="/smf"/>
> 
> </smfbd.submitJarBundle>
> 
> </target>
> 
> </project>
> 
> 
> but when I try to run prgrammtically it gives a null pointer. Please Could
> someone tell me how am i supose to find from where the exception throws.
> submit_a_bundle:
> 
> BUILD FAILED
> 
> C:\Documents and Settings\tharanga\My
> Documents\IBM\wssitedev51\workspace\AntRunner\build.xml:12: 
> java.lang.NullPointerException
> 
> Total time: 2 seconds
> 
> 
>  It is line 12 but is it the "bundlepath" or is it because of the related
> class file for smfbd task is missing. Thank you very much.
> 
> 
> 

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