String basepath = VaadinService.getCurrent().getBaseDirectory().getAbsolutePath();
  String fileName = basepath + "/WEB-INF/rep/test.jasper";

     JasperPrint print = JasperFillManager.fillReport("test.jasper", hm, con );
//   JasperPrint print = JasperFillManager.fillReport(fileName , hm, con );	  

java.lang.NullPointerException
	at org.codehaus.groovy.reflection.GeneratedMetaMethod$DgmMethodRecord.loadDgmInfo(GeneratedMetaMethod.java:163)
	at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.registerMethods(MetaClassRegistryImpl.java:230)
	at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.<init>(MetaClassRegistryImpl.java:92)
	at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.<init>(MetaClassRegistryImpl.java:70)
	at groovy.lang.GroovySystem.<clinit>(GroovySystem.java:33)
	at org.codehaus.groovy.runtime.InvokerHelper.<clinit>(InvokerHelper.java:62)
	at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.initMetaClass(ScriptBytecodeAdapter.java:774)
	at test_1384719878843_734379.$getStaticMetaClass(calculator_test_1384719878843_734379)
	at test_1384719878843_734379.<init>(calculator_test_1384719878843_734379:18)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
	at java.lang.Class.newInstance0(Class.java:355)
	at java.lang.Class.newInstance(Class.java:308)
	at net.sf.jasperreports.engine.design.JRAbstractJavaCompiler.loadEvaluator(JRAbstractJavaCompiler.java:112)
	at net.sf.jasperreports.engine.design.JRAbstractCompiler.loadEvaluator(JRAbstractCompiler.java:333)
	at net.sf.jasperreports.engine.JasperCompileManager.getEvaluator(JasperCompileManager.java:265)
	at net.sf.jasperreports.engine.fill.JRFillDataset.createCalculator(JRFillDataset.java:457)
	at net.sf.jasperreports.engine.fill.JRBaseFiller.<init>(JRBaseFiller.java:379)
	at net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:88)
	at net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:103)
	at net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:61)
	at net.sf.jasperreports.engine.fill.JRFiller.createFiller(JRFiller.java:153)
	at net.sf.jasperreports.engine.fill.JRFiller.fill(JRFiller.java:55)
	at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:446)
	at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:276)
	at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:745)
	at com.itap.vaadtest.ReportTest.GenerateReport(ReportTest.java:117)
	at com.itap.vaadtest.ReportTest.buttonClick(ReportTest.java:75)
	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:597)
	at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:508)
	at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:167)
	at com.vaadin.server.AbstractClientConnector.fireEvent(AbstractClientConnector.java:969)
	at com.vaadin.ui.Button.fireClick(Button.java:368)
	at com.vaadin.ui.Button$1.click(Button.java:57)
	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:597)
	at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:168)
	at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:118)
	at com.vaadin.server.communication.ServerRpcHandler.handleBurst(ServerRpcHandler.java:207)
	at com.vaadin.server.communication.ServerRpcHandler.handleRpc(ServerRpcHandler.java:111)
	at com.vaadin.server.communication.UidlRequestHandler.synchronizedHandleRequest(UidlRequestHandler.java:91)
	at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:37)
	at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1371)
	at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:238)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:662)
17.11.2013 22:29:25 com.vaadin.server.DefaultErrorHandler doDefault