Facing Null Pointer Exception while using BIRT
- by srikanth
Hi, I am using BIRT APIs in a java program.My code is :
package com.tecnotree.mdx.product.utils;
import java.util.HashMap;
import java.util.logging.Level;
import org.eclipse.birt.core.exception.BirtException;
import org.eclipse.birt.core.framework.Platform;
import org.eclipse.birt.report.engine.api.EngineConfig;
import org.eclipse.birt.report.engine.api.EngineConstants;
import org.eclipse.birt.report.engine.api.HTMLRenderOption;
import org.eclipse.birt.report.engine.api.IReportEngine;
import org.eclipse.birt.report.engine.api.IReportEngineFactory;
import org.eclipse.birt.report.engine.api.IReportRunnable;
import org.eclipse.birt.report.engine.api.IRunAndRenderTask;
import org.eclipse.birt.report.engine.api.ReportEngine;
public class ExampleReport {
public static void main(String[] args) {
// Variables used to control BIRT Engine instance
ReportEngine eng = null;
IReportRunnable design = null;
IRunAndRenderTask task = null;
HTMLRenderOption renderContext = null;
HashMap contextMap = null;
HTMLRenderOption options = null;
final EngineConfig conf = new EngineConfig();
conf
.setEngineHome("C:\\birt-runtime-2_5_2\\birt-runtime-2_5_2\\ReportEngine");
System.out.println("conf " + conf.getBIRTHome());
conf.setLogConfig(null, Level.FINE);
try {
Platform.startup(conf);
} catch (BirtException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
IReportEngineFactory factory = (IReportEngineFactory) Platform
.createFactoryObject(IReportEngineFactory.EXTENSION_REPORT_ENGINE_FACTORY);
System.out.println("Factory : " + factory.toString());
System.out.println(conf.toString());
IReportEngine engine = factory.createReportEngine(conf);
System.out.println("Engine : " + engine);
try {
design = eng
.openReportDesign("C:\\birt-runtime-2_5_2\\birt-runtime-2_5_2\\ReportEngine\\samples\\hello_world.rptdesign");
} catch (Exception e) {
System.err
.println("An error occured during the opening of the report file!");
e.printStackTrace();
System.exit(-1);
}
task = eng.createRunAndRenderTask(design);
renderContext = new HTMLRenderOption();
renderContext.setImageDirectory("image");
contextMap = new HashMap();
contextMap.put(EngineConstants.APPCONTEXT_HTML_RENDER_CONTEXT,
renderContext);
task.setAppContext(contextMap);
options = new HTMLRenderOption();
options.setOutputFileName("c:/temp/output.html");
options.setOutputFormat("html");
task.setRenderOption(options);
try {
task.run();
} catch (Exception e) {
System.err.println("An error occured while running the report!");
e.printStackTrace();
System.exit(-1);
}
System.out.println("All went well. Closing program!");
eng.destroy();
}
}
But i am facing NullPointerException while creating the report.
STACKTRACE :
Exception in thread "main" java.lang.NullPointerException
at org.eclipse.birt.report.engine.api.impl.ReportEngine$EngineExtensionManager.<init>(ReportEngine.java:784)
at org.eclipse.birt.report.engine.api.impl.ReportEngine.<init>(ReportEngine.java:109)
at org.eclipse.birt.report.engine.api.impl.ReportEngineFactory$1.run(ReportEngineFactory.java:18)
at org.eclipse.birt.report.engine.api.impl.ReportEngineFactory$1.run(ReportEngineFactory.java:1)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.birt.report.engine.api.impl.ReportEngineFactory.createReportEngine(ReportEngineFactory.java:14)
at com.tecnotree.mdx.product.utils.ExampleReport.main(ExampleReport.java:47)
Please help me regarding this... my project deadline has been reached...
Appreciate your Reply
Thanks in Advance
