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    This happens when you try to instantiate a class that can't be instantiated, either because the class object is abstract, an interface, an array class, a primitive type, void, or because the class has no nullary constructor.

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via openxava by zballesta
, 1 year ago
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java.lang.InstantiationException: 	at sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:48)	at java.lang.reflect.Constructor.newInstance(Constructor.java:525)	at java.lang.Class.newInstance0(Class.java:372)	at java.lang.Class.newInstance(Class.java:325)	at org.openxava.model.impl.POJOPersistenceProviderBase.create(POJOPersistenceProviderBase.java:144)	at org.openxava.model.impl.MapFacadeBean.create(MapFacadeBean.java:725)	at org.openxava.model.impl.MapFacadeBean.createReturningKey(MapFacadeBean.java:598)	at org.openxava.model.impl.MapFacadeBean.createReturningKey(MapFacadeBean.java:256)	at org.openxava.model.impl.MapFacadeBean.createNotValidatingCollections(MapFacadeBean.java:285)	at org.openxava.model.MapFacade.createNotValidatingCollections(MapFacade.java:310)	at org.openxava.actions.SaveElementInCollectionAction.saveIfNotExists(SaveElementInCollectionAction.java:140)	at org.openxava.actions.SaveElementInCollectionAction.execute(SaveElementInCollectionAction.java:28)	at org.openxava.controller.ModuleManager.executeAction(ModuleManager.java:399)	at org.openxava.controller.ModuleManager.executeAction(ModuleManager.java:318)	at org.openxava.controller.ModuleManager.execute(ModuleManager.java:278)	at org.apache.jsp.xava.execute_jsp._jspService(execute_jsp.java:177)	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:551)	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:488)	at org.openxava.web.servlets.Servlets.getURIAsStream(Servlets.java:66)	at org.openxava.web.dwr.Module.getURIAsStream(Module.java:204)	at org.openxava.web.dwr.Module.request(Module.java:62)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:601)	at org.directwebremoting.impl.ExecuteAjaxFilter.doFilter(ExecuteAjaxFilter.java:34)	at org.directwebremoting.impl.DefaultRemoter$1.doFilter(DefaultRemoter.java:428)	at org.directwebremoting.impl.DefaultRemoter.execute(DefaultRemoter.java:431)	at org.directwebremoting.impl.DefaultRemoter.execute(DefaultRemoter.java:283)	at org.directwebremoting.servlet.PlainCallHandler.handle(PlainCallHandler.java:52)	at org.directwebremoting.servlet.UrlProcessor.handle(UrlProcessor.java:101)	at org.directwebremoting.servlet.DwrServlet.doPost(DwrServlet.java:146)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)	at java.lang.Thread.run(Thread.java:722)