[
https://issues.apache.org/jira/browse/ISIS-483?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jeroen van der Wal updated ISIS-483:
------------------------------------
Description:
Create a repository that inherits from a "generic" one, which implements a
"generic" function like this:
{code}
public abstract class MyAbstractDomainObjectRepositoryAndFactory<DO extends
MyAbstractDomainObject>
extends AbstractFactoryAndRepository {
public List<DO> listAll() {
return this.allInstances(this.domainObjectClass);
}
...
}
{code}
Create a concrete implementation of the previous repository like this one,
which introduces a new action/method:
{code}
public class DomainEntityClassCustomRepository extends
AbstractMultiTenantEntityRepositoryAndFactory<DomainEntityClass> {
...
public List<RiskRegister> listAllRiskRegisters() {
return this.listAll();
}
...
}
{code}
And:
DomainEntityClass inherits from MyAbstractDomainObject.
If the "listAllRiskRegisters" action is invoked from the Wicket viewer it works
perfectly, and a list of DomainEntityClass'es is shown.
And if the list only contains 1 element, the "listAll" action also shows that
element.
But if the "listAll" action is invoked and the list contains more than 1
element the following exception is thrown:
{code}
org.apache.wicket.WicketRuntimeException
Can't instantiate page using constructor 'public
org.apache.isis.viewer.wicket.ui.pages.action.ActionPage(org.apache.wicket.request.mapper.parameter.PageParameters)'
and argument 'pageType=[ACTION], actionSingleResultsMode=[REDIRECT],
objectOid=[com.company.DomainEntityClassCustomRepository:1], actionType=[USER],
actionOwningSpec=[com.company.DomainEntityClassCustomRepository],
actionId=[listAll()], pageTitle=[List All], actionMode=[RESULTS]'. Might be it
doesn't exist, may be it is not visible (public).
org.apache.wicket.session.DefaultPageFactory#newPage(DefaultPageFactory.java:193)
org.apache.wicket.session.DefaultPageFactory#newPage(DefaultPageFactory.java:98)
org.apache.wicket.DefaultMapperContext#newPageInstance(DefaultMapperContext.java:137)
org.apache.wicket.core.request.handler.PageProvider#resolvePageInstance(PageProvider.java:268)
org.apache.wicket.core.request.handler.PageProvider#getPageInstance(PageProvider.java:166)
org.apache.wicket.request.handler.render.PageRenderer#getPage(PageRenderer.java:78)
org.apache.wicket.request.handler.render.WebPageRenderer#renderPage(WebPageRenderer.java:94)
org.apache.wicket.request.handler.render.WebPageRenderer#respond(WebPageRenderer.java:196)
org.apache.wicket.core.request.handler.RenderPageRequestHandler#respond(RenderPageRequestHandler.java:165)
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor#respond(RequestCycle.java:854)
org.apache.wicket.request.RequestHandlerStack#execute(RequestHandlerStack.java:64)
org.apache.wicket.request.cycle.RequestCycle#execute(RequestCycle.java:254)
org.apache.wicket.request.cycle.RequestCycle#processRequest(RequestCycle.java:211)
org.apache.wicket.request.cycle.RequestCycle#processRequestAndDetach(RequestCycle.java:282)
org.apache.wicket.protocol.http.WicketFilter#processRequestCycle(WicketFilter.java:259)
org.apache.wicket.protocol.http.WicketFilter#processRequest(WicketFilter.java:201)
org.apache.wicket.protocol.http.WicketFilter#doFilter(WicketFilter.java:282)
org.eclipse.jetty.servlet.ServletHandler$CachedChain#doFilter(ServletHandler.java:1326)
org.apache.shiro.web.servlet.AbstractShiroFilter#executeChain(AbstractShiroFilter.java:449)
org.apache.shiro.web.servlet.AbstractShiroFilter$1#call(AbstractShiroFilter.java:365)
org.apache.shiro.subject.support.SubjectCallable#doCall(SubjectCallable.java:90)
org.apache.shiro.subject.support.SubjectCallable#call(SubjectCallable.java:83)
org.apache.shiro.subject.support.DelegatingSubject#execute(DelegatingSubject.java:383)
org.apache.shiro.web.servlet.AbstractShiroFilter#doFilterInternal(AbstractShiroFilter.java:362)
org.apache.shiro.web.servlet.OncePerRequestFilter#doFilter(OncePerRequestFilter.java:125)
org.eclipse.jetty.servlet.ServletHandler$CachedChain#doFilter(ServletHandler.java:1326)
org.eclipse.jetty.servlet.ServletHandler#doHandle(ServletHandler.java:479)
org.eclipse.jetty.server.handler.ScopedHandler#handle(ScopedHandler.java:119)
org.eclipse.jetty.security.SecurityHandler#handle(SecurityHandler.java:520)
org.eclipse.jetty.server.session.SessionHandler#doHandle(SessionHandler.java:227)
org.eclipse.jetty.server.handler.ContextHandler#doHandle(ContextHandler.java:940)
org.eclipse.jetty.servlet.ServletHandler#doScope(ServletHandler.java:409)
org.eclipse.jetty.server.session.SessionHandler#doScope(SessionHandler.java:186)
org.eclipse.jetty.server.handler.ContextHandler#doScope(ContextHandler.java:874)
org.eclipse.jetty.server.handler.ScopedHandler#handle(ScopedHandler.java:117)
org.eclipse.jetty.server.handler.ContextHandlerCollection#handle(ContextHandlerCollection.java:250)
org.eclipse.jetty.server.handler.HandlerCollection#handle(HandlerCollection.java:149)
org.eclipse.jetty.server.handler.HandlerWrapper#handle(HandlerWrapper.java:110)
org.eclipse.jetty.server.Server#handle(Server.java:349)
org.eclipse.jetty.server.HttpConnection#handleRequest(HttpConnection.java:441)
org.eclipse.jetty.server.HttpConnection$RequestHandler#headerComplete(HttpConnection.java:904)
org.eclipse.jetty.http.HttpParser#parseNext(HttpParser.java:565)
org.eclipse.jetty.http.HttpParser#parseAvailable(HttpParser.java:217)
org.eclipse.jetty.server.AsyncHttpConnection#handle(AsyncHttpConnection.java:46)
org.eclipse.jetty.io.nio.SelectChannelEndPoint#handle(SelectChannelEndPoint.java:545)
org.eclipse.jetty.io.nio.SelectChannelEndPoint$1#run(SelectChannelEndPoint.java:43)
org.eclipse.jetty.util.thread.QueuedThreadPool#runJob(QueuedThreadPool.java:598)
org.eclipse.jetty.util.thread.QueuedThreadPool$3#run(QueuedThreadPool.java:533)
java.lang.Thread#run(Thread.java:680)
java.lang.reflect.InvocationTargetException
sun.reflect.NativeConstructorAccessorImpl#newInstance0(NativeConstructorAccessorImpl.java:-2)
sun.reflect.NativeConstructorAccessorImpl#newInstance(NativeConstructorAccessorImpl.java:39)
sun.reflect.DelegatingConstructorAccessorImpl#newInstance(DelegatingConstructorAccessorImpl.java:27)
java.lang.reflect.Constructor#newInstance(Constructor.java:513)
org.apache.wicket.session.DefaultPageFactory#newPage(DefaultPageFactory.java:170)
org.apache.wicket.session.DefaultPageFactory#newPage(DefaultPageFactory.java:98)
org.apache.wicket.DefaultMapperContext#newPageInstance(DefaultMapperContext.java:137)
org.apache.wicket.core.request.handler.PageProvider#resolvePageInstance(PageProvider.java:268)
org.apache.wicket.core.request.handler.PageProvider#getPageInstance(PageProvider.java:166)
org.apache.wicket.request.handler.render.PageRenderer#getPage(PageRenderer.java:78)
org.apache.wicket.request.handler.render.WebPageRenderer#renderPage(WebPageRenderer.java:94)
org.apache.wicket.request.handler.render.WebPageRenderer#respond(WebPageRenderer.java:196)
org.apache.wicket.core.request.handler.RenderPageRequestHandler#respond(RenderPageRequestHandler.java:165)
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor#respond(RequestCycle.java:854)
org.apache.wicket.request.RequestHandlerStack#execute(RequestHandlerStack.java:64)
org.apache.wicket.request.cycle.RequestCycle#execute(RequestCycle.java:254)
org.apache.wicket.request.cycle.RequestCycle#processRequest(RequestCycle.java:211)
org.apache.wicket.request.cycle.RequestCycle#processRequestAndDetach(RequestCycle.java:282)
org.apache.wicket.protocol.http.WicketFilter#processRequestCycle(WicketFilter.java:259)
org.apache.wicket.protocol.http.WicketFilter#processRequest(WicketFilter.java:201)
org.apache.wicket.protocol.http.WicketFilter#doFilter(WicketFilter.java:282)
org.eclipse.jetty.servlet.ServletHandler$CachedChain#doFilter(ServletHandler.java:1326)
org.apache.shiro.web.servlet.AbstractShiroFilter#executeChain(AbstractShiroFilter.java:449)
org.apache.shiro.web.servlet.AbstractShiroFilter$1#call(AbstractShiroFilter.java:365)
org.apache.shiro.subject.support.SubjectCallable#doCall(SubjectCallable.java:90)
org.apache.shiro.subject.support.SubjectCallable#call(SubjectCallable.java:83)
org.apache.shiro.subject.support.DelegatingSubject#execute(DelegatingSubject.java:383)
org.apache.shiro.web.servlet.AbstractShiroFilter#doFilterInternal(AbstractShiroFilter.java:362)
org.apache.shiro.web.servlet.OncePerRequestFilter#doFilter(OncePerRequestFilter.java:125)
org.eclipse.jetty.servlet.ServletHandler$CachedChain#doFilter(ServletHandler.java:1326)
org.eclipse.jetty.servlet.ServletHandler#doHandle(ServletHandler.java:479)
org.eclipse.jetty.server.handler.ScopedHandler#handle(ScopedHandler.java:119)
org.eclipse.jetty.security.SecurityHandler#handle(SecurityHandler.java:520)
org.eclipse.jetty.server.session.SessionHandler#doHandle(SessionHandler.java:227)
org.eclipse.jetty.server.handler.ContextHandler#doHandle(ContextHandler.java:940)
org.eclipse.jetty.servlet.ServletHandler#doScope(ServletHandler.java:409)
org.eclipse.jetty.server.session.SessionHandler#doScope(SessionHandler.java:186)
org.eclipse.jetty.server.handler.ContextHandler#doScope(ContextHandler.java:874)
org.eclipse.jetty.server.handler.ScopedHandler#handle(ScopedHandler.java:117)
org.eclipse.jetty.server.handler.ContextHandlerCollection#handle(ContextHandlerCollection.java:250)
org.eclipse.jetty.server.handler.HandlerCollection#handle(HandlerCollection.java:149)
org.eclipse.jetty.server.handler.HandlerWrapper#handle(HandlerWrapper.java:110)
org.eclipse.jetty.server.Server#handle(Server.java:349)
org.eclipse.jetty.server.HttpConnection#handleRequest(HttpConnection.java:441)
org.eclipse.jetty.server.HttpConnection$RequestHandler#headerComplete(HttpConnection.java:904)
org.eclipse.jetty.http.HttpParser#parseNext(HttpParser.java:565)
org.eclipse.jetty.http.HttpParser#parseAvailable(HttpParser.java:217)
org.eclipse.jetty.server.AsyncHttpConnection#handle(AsyncHttpConnection.java:46)
org.eclipse.jetty.io.nio.SelectChannelEndPoint#handle(SelectChannelEndPoint.java:545)
org.eclipse.jetty.io.nio.SelectChannelEndPoint$1#run(SelectChannelEndPoint.java:43)
org.eclipse.jetty.util.thread.QueuedThreadPool#runJob(QueuedThreadPool.java:598)
org.eclipse.jetty.util.thread.QueuedThreadPool$3#run(QueuedThreadPool.java:533)
java.lang.Thread#run(Thread.java:680)
java.lang.NullPointerException
org.apache.isis.viewer.wicket.model.models.EntityCollectionModel#createStandalone(EntityCollectionModel.java:152)
org.apache.isis.viewer.wicket.ui.components.actions.ActionPanel$ResultType$2#addOrReplaceCollectionResultsPanel(ActionPanel.java:361)
org.apache.isis.viewer.wicket.ui.components.actions.ActionPanel$ResultType$2#addResults(ActionPanel.java:357)
org.apache.isis.viewer.wicket.ui.components.actions.ActionPanel#executeActionOnTargetAndProcessResults(ActionPanel.java:186)
org.apache.isis.viewer.wicket.ui.components.actions.ActionPanel#executeActionAndProcessResults(ActionPanel.java:138)
org.apache.isis.viewer.wicket.ui.components.actions.ActionPanel#buildGui(ActionPanel.java:96)
org.apache.isis.viewer.wicket.ui.components.actions.ActionPanel#<init>(ActionPanel.java:89)
org.apache.isis.viewer.wicket.ui.components.actions.ActionPanelFactory#createComponent(ActionPanelFactory.java:49)
org.apache.isis.viewer.wicket.ui.ComponentFactoryAbstract#createComponent(ComponentFactoryAbstract.java:82)
org.apache.isis.viewer.wicket.viewer.registries.components.ComponentFactoryRegistryDefault#createComponent(ComponentFactoryRegistryDefault.java:120)
org.apache.isis.viewer.wicket.viewer.registries.components.ComponentFactoryRegistryDefault#addOrReplaceComponent(ComponentFactoryRegistryDefault.java:105)
org.apache.isis.viewer.wicket.ui.pages.PageAbstract#addComponent(PageAbstract.java:266)
org.apache.isis.viewer.wicket.ui.pages.PageAbstract#addChildComponents(PageAbstract.java:261)
org.apache.isis.viewer.wicket.ui.pages.action.ActionPage#<init>(ActionPage.java:54)
sun.reflect.NativeConstructorAccessorImpl#newInstance0(NativeConstructorAccessorImpl.java:-2)
sun.reflect.NativeConstructorAccessorImpl#newInstance(NativeConstructorAccessorImpl.java:39)
sun.reflect.DelegatingConstructorAccessorImpl#newInstance(DelegatingConstructorAccessorImpl.java:27)
java.lang.reflect.Constructor#newInstance(Constructor.java:513)
org.apache.wicket.session.DefaultPageFactory#newPage(DefaultPageFactory.java:170)
org.apache.wicket.session.DefaultPageFactory#newPage(DefaultPageFactory.java:98)
org.apache.wicket.DefaultMapperContext#newPageInstance(DefaultMapperContext.java:137)
org.apache.wicket.core.request.handler.PageProvider#resolvePageInstance(PageProvider.java:268)
org.apache.wicket.core.request.handler.PageProvider#getPageInstance(PageProvider.java:166)
org.apache.wicket.request.handler.render.PageRenderer#getPage(PageRenderer.java:78)
org.apache.wicket.request.handler.render.WebPageRenderer#renderPage(WebPageRenderer.java:94)
org.apache.wicket.request.handler.render.WebPageRenderer#respond(WebPageRenderer.java:196)
org.apache.wicket.core.request.handler.RenderPageRequestHandler#respond(RenderPageRequestHandler.java:165)
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor#respond(RequestCycle.java:854)
org.apache.wicket.request.RequestHandlerStack#execute(RequestHandlerStack.java:64)
org.apache.wicket.request.cycle.RequestCycle#execute(RequestCycle.java:254)
org.apache.wicket.request.cycle.RequestCycle#processRequest(RequestCycle.java:211)
org.apache.wicket.request.cycle.RequestCycle#processRequestAndDetach(RequestCycle.java:282)
org.apache.wicket.protocol.http.WicketFilter#processRequestCycle(WicketFilter.java:259)
org.apache.wicket.protocol.http.WicketFilter#processRequest(WicketFilter.java:201)
org.apache.wicket.protocol.http.WicketFilter#doFilter(WicketFilter.java:282)
org.eclipse.jetty.servlet.ServletHandler$CachedChain#doFilter(ServletHandler.java:1326)
org.apache.shiro.web.servlet.AbstractShiroFilter#executeChain(AbstractShiroFilter.java:449)
org.apache.shiro.web.servlet.AbstractShiroFilter$1#call(AbstractShiroFilter.java:365)
org.apache.shiro.subject.support.SubjectCallable#doCall(SubjectCallable.java:90)
org.apache.shiro.subject.support.SubjectCallable#call(SubjectCallable.java:83)
org.apache.shiro.subject.support.DelegatingSubject#execute(DelegatingSubject.java:383)
org.apache.shiro.web.servlet.AbstractShiroFilter#doFilterInternal(AbstractShiroFilter.java:362)
org.apache.shiro.web.servlet.OncePerRequestFilter#doFilter(OncePerRequestFilter.java:125)
org.eclipse.jetty.servlet.ServletHandler$CachedChain#doFilter(ServletHandler.java:1326)
org.eclipse.jetty.servlet.ServletHandler#doHandle(ServletHandler.java:479)
org.eclipse.jetty.server.handler.ScopedHandler#handle(ScopedHandler.java:119)
org.eclipse.jetty.security.SecurityHandler#handle(SecurityHandler.java:520)
org.eclipse.jetty.server.session.SessionHandler#doHandle(SessionHandler.java:227)
org.eclipse.jetty.server.handler.ContextHandler#doHandle(ContextHandler.java:940)
org.eclipse.jetty.servlet.ServletHandler#doScope(ServletHandler.java:409)
org.eclipse.jetty.server.session.SessionHandler#doScope(SessionHandler.java:186)
org.eclipse.jetty.server.handler.ContextHandler#doScope(ContextHandler.java:874)
org.eclipse.jetty.server.handler.ScopedHandler#handle(ScopedHandler.java:117)
org.eclipse.jetty.server.handler.ContextHandlerCollection#handle(ContextHandlerCollection.java:250)
org.eclipse.jetty.server.handler.HandlerCollection#handle(HandlerCollection.java:149)
org.eclipse.jetty.server.handler.HandlerWrapper#handle(HandlerWrapper.java:110)
org.eclipse.jetty.server.Server#handle(Server.java:349)
org.eclipse.jetty.server.HttpConnection#handleRequest(HttpConnection.java:441)
org.eclipse.jetty.server.HttpConnection$RequestHandler#headerComplete(HttpConnection.java:904)
org.eclipse.jetty.http.HttpParser#parseNext(HttpParser.java:565)
org.eclipse.jetty.http.HttpParser#parseAvailable(HttpParser.java:217)
org.eclipse.jetty.server.AsyncHttpConnection#handle(AsyncHttpConnection.java:46)
org.eclipse.jetty.io.nio.SelectChannelEndPoint#handle(SelectChannelEndPoint.java:545)
org.eclipse.jetty.io.nio.SelectChannelEndPoint$1#run(SelectChannelEndPoint.java:43)
org.eclipse.jetty.util.thread.QueuedThreadPool#runJob(QueuedThreadPool.java:598)
org.eclipse.jetty.util.thread.QueuedThreadPool$3#run(QueuedThreadPool.java:533)
java.lang.Thread#run(Thread.java:680)
{code}
So it seems that Isis is not properly recognizing the type enclosed on the List
represented by <DO>.
was:
Create a repository that inherits from a "generic" one, which implements a
"generic" function like this:
public abstract class MyAbstractDomainObjectRepositoryAndFactory<DO extends
MyAbstractDomainObject>
extends AbstractFactoryAndRepository {
public List<DO> listAll() {
return this.allInstances(this.domainObjectClass);
}
...
}
Create a concrete implementation of the previous repository like this one,
which introduces a new action/method:
public class DomainEntityClassCustomRepository extends
AbstractMultiTenantEntityRepositoryAndFactory<DomainEntityClass> {
...
public List<RiskRegister> listAllRiskRegisters() {
return this.listAll();
}
...
}
And DomainEntityClass inherits from MyAbstractDomainObject.
If the "listAllRiskRegisters" action is invoked from the Wicket viewer it works
perfectly, and a list of DomainEntityClass'es is shown.
And if the list only contains 1 element, the "listAll" action also shows that
element.
But if the "listAll" action is invoked and the list contains more than 1
element the following exception is thrown:
org.apache.wicket.WicketRuntimeException
Can't instantiate page using constructor 'public
org.apache.isis.viewer.wicket.ui.pages.action.ActionPage(org.apache.wicket.request.mapper.parameter.PageParameters)'
and argument 'pageType=[ACTION], actionSingleResultsMode=[REDIRECT],
objectOid=[com.company.DomainEntityClassCustomRepository:1], actionType=[USER],
actionOwningSpec=[com.company.DomainEntityClassCustomRepository],
actionId=[listAll()], pageTitle=[List All], actionMode=[RESULTS]'. Might be it
doesn't exist, may be it is not visible (public).
org.apache.wicket.session.DefaultPageFactory#newPage(DefaultPageFactory.java:193)
org.apache.wicket.session.DefaultPageFactory#newPage(DefaultPageFactory.java:98)
org.apache.wicket.DefaultMapperContext#newPageInstance(DefaultMapperContext.java:137)
org.apache.wicket.core.request.handler.PageProvider#resolvePageInstance(PageProvider.java:268)
org.apache.wicket.core.request.handler.PageProvider#getPageInstance(PageProvider.java:166)
org.apache.wicket.request.handler.render.PageRenderer#getPage(PageRenderer.java:78)
org.apache.wicket.request.handler.render.WebPageRenderer#renderPage(WebPageRenderer.java:94)
org.apache.wicket.request.handler.render.WebPageRenderer#respond(WebPageRenderer.java:196)
org.apache.wicket.core.request.handler.RenderPageRequestHandler#respond(RenderPageRequestHandler.java:165)
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor#respond(RequestCycle.java:854)
org.apache.wicket.request.RequestHandlerStack#execute(RequestHandlerStack.java:64)
org.apache.wicket.request.cycle.RequestCycle#execute(RequestCycle.java:254)
org.apache.wicket.request.cycle.RequestCycle#processRequest(RequestCycle.java:211)
org.apache.wicket.request.cycle.RequestCycle#processRequestAndDetach(RequestCycle.java:282)
org.apache.wicket.protocol.http.WicketFilter#processRequestCycle(WicketFilter.java:259)
org.apache.wicket.protocol.http.WicketFilter#processRequest(WicketFilter.java:201)
org.apache.wicket.protocol.http.WicketFilter#doFilter(WicketFilter.java:282)
org.eclipse.jetty.servlet.ServletHandler$CachedChain#doFilter(ServletHandler.java:1326)
org.apache.shiro.web.servlet.AbstractShiroFilter#executeChain(AbstractShiroFilter.java:449)
org.apache.shiro.web.servlet.AbstractShiroFilter$1#call(AbstractShiroFilter.java:365)
org.apache.shiro.subject.support.SubjectCallable#doCall(SubjectCallable.java:90)
org.apache.shiro.subject.support.SubjectCallable#call(SubjectCallable.java:83)
org.apache.shiro.subject.support.DelegatingSubject#execute(DelegatingSubject.java:383)
org.apache.shiro.web.servlet.AbstractShiroFilter#doFilterInternal(AbstractShiroFilter.java:362)
org.apache.shiro.web.servlet.OncePerRequestFilter#doFilter(OncePerRequestFilter.java:125)
org.eclipse.jetty.servlet.ServletHandler$CachedChain#doFilter(ServletHandler.java:1326)
org.eclipse.jetty.servlet.ServletHandler#doHandle(ServletHandler.java:479)
org.eclipse.jetty.server.handler.ScopedHandler#handle(ScopedHandler.java:119)
org.eclipse.jetty.security.SecurityHandler#handle(SecurityHandler.java:520)
org.eclipse.jetty.server.session.SessionHandler#doHandle(SessionHandler.java:227)
org.eclipse.jetty.server.handler.ContextHandler#doHandle(ContextHandler.java:940)
org.eclipse.jetty.servlet.ServletHandler#doScope(ServletHandler.java:409)
org.eclipse.jetty.server.session.SessionHandler#doScope(SessionHandler.java:186)
org.eclipse.jetty.server.handler.ContextHandler#doScope(ContextHandler.java:874)
org.eclipse.jetty.server.handler.ScopedHandler#handle(ScopedHandler.java:117)
org.eclipse.jetty.server.handler.ContextHandlerCollection#handle(ContextHandlerCollection.java:250)
org.eclipse.jetty.server.handler.HandlerCollection#handle(HandlerCollection.java:149)
org.eclipse.jetty.server.handler.HandlerWrapper#handle(HandlerWrapper.java:110)
org.eclipse.jetty.server.Server#handle(Server.java:349)
org.eclipse.jetty.server.HttpConnection#handleRequest(HttpConnection.java:441)
org.eclipse.jetty.server.HttpConnection$RequestHandler#headerComplete(HttpConnection.java:904)
org.eclipse.jetty.http.HttpParser#parseNext(HttpParser.java:565)
org.eclipse.jetty.http.HttpParser#parseAvailable(HttpParser.java:217)
org.eclipse.jetty.server.AsyncHttpConnection#handle(AsyncHttpConnection.java:46)
org.eclipse.jetty.io.nio.SelectChannelEndPoint#handle(SelectChannelEndPoint.java:545)
org.eclipse.jetty.io.nio.SelectChannelEndPoint$1#run(SelectChannelEndPoint.java:43)
org.eclipse.jetty.util.thread.QueuedThreadPool#runJob(QueuedThreadPool.java:598)
org.eclipse.jetty.util.thread.QueuedThreadPool$3#run(QueuedThreadPool.java:533)
java.lang.Thread#run(Thread.java:680)
java.lang.reflect.InvocationTargetException
sun.reflect.NativeConstructorAccessorImpl#newInstance0(NativeConstructorAccessorImpl.java:-2)
sun.reflect.NativeConstructorAccessorImpl#newInstance(NativeConstructorAccessorImpl.java:39)
sun.reflect.DelegatingConstructorAccessorImpl#newInstance(DelegatingConstructorAccessorImpl.java:27)
java.lang.reflect.Constructor#newInstance(Constructor.java:513)
org.apache.wicket.session.DefaultPageFactory#newPage(DefaultPageFactory.java:170)
org.apache.wicket.session.DefaultPageFactory#newPage(DefaultPageFactory.java:98)
org.apache.wicket.DefaultMapperContext#newPageInstance(DefaultMapperContext.java:137)
org.apache.wicket.core.request.handler.PageProvider#resolvePageInstance(PageProvider.java:268)
org.apache.wicket.core.request.handler.PageProvider#getPageInstance(PageProvider.java:166)
org.apache.wicket.request.handler.render.PageRenderer#getPage(PageRenderer.java:78)
org.apache.wicket.request.handler.render.WebPageRenderer#renderPage(WebPageRenderer.java:94)
org.apache.wicket.request.handler.render.WebPageRenderer#respond(WebPageRenderer.java:196)
org.apache.wicket.core.request.handler.RenderPageRequestHandler#respond(RenderPageRequestHandler.java:165)
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor#respond(RequestCycle.java:854)
org.apache.wicket.request.RequestHandlerStack#execute(RequestHandlerStack.java:64)
org.apache.wicket.request.cycle.RequestCycle#execute(RequestCycle.java:254)
org.apache.wicket.request.cycle.RequestCycle#processRequest(RequestCycle.java:211)
org.apache.wicket.request.cycle.RequestCycle#processRequestAndDetach(RequestCycle.java:282)
org.apache.wicket.protocol.http.WicketFilter#processRequestCycle(WicketFilter.java:259)
org.apache.wicket.protocol.http.WicketFilter#processRequest(WicketFilter.java:201)
org.apache.wicket.protocol.http.WicketFilter#doFilter(WicketFilter.java:282)
org.eclipse.jetty.servlet.ServletHandler$CachedChain#doFilter(ServletHandler.java:1326)
org.apache.shiro.web.servlet.AbstractShiroFilter#executeChain(AbstractShiroFilter.java:449)
org.apache.shiro.web.servlet.AbstractShiroFilter$1#call(AbstractShiroFilter.java:365)
org.apache.shiro.subject.support.SubjectCallable#doCall(SubjectCallable.java:90)
org.apache.shiro.subject.support.SubjectCallable#call(SubjectCallable.java:83)
org.apache.shiro.subject.support.DelegatingSubject#execute(DelegatingSubject.java:383)
org.apache.shiro.web.servlet.AbstractShiroFilter#doFilterInternal(AbstractShiroFilter.java:362)
org.apache.shiro.web.servlet.OncePerRequestFilter#doFilter(OncePerRequestFilter.java:125)
org.eclipse.jetty.servlet.ServletHandler$CachedChain#doFilter(ServletHandler.java:1326)
org.eclipse.jetty.servlet.ServletHandler#doHandle(ServletHandler.java:479)
org.eclipse.jetty.server.handler.ScopedHandler#handle(ScopedHandler.java:119)
org.eclipse.jetty.security.SecurityHandler#handle(SecurityHandler.java:520)
org.eclipse.jetty.server.session.SessionHandler#doHandle(SessionHandler.java:227)
org.eclipse.jetty.server.handler.ContextHandler#doHandle(ContextHandler.java:940)
org.eclipse.jetty.servlet.ServletHandler#doScope(ServletHandler.java:409)
org.eclipse.jetty.server.session.SessionHandler#doScope(SessionHandler.java:186)
org.eclipse.jetty.server.handler.ContextHandler#doScope(ContextHandler.java:874)
org.eclipse.jetty.server.handler.ScopedHandler#handle(ScopedHandler.java:117)
org.eclipse.jetty.server.handler.ContextHandlerCollection#handle(ContextHandlerCollection.java:250)
org.eclipse.jetty.server.handler.HandlerCollection#handle(HandlerCollection.java:149)
org.eclipse.jetty.server.handler.HandlerWrapper#handle(HandlerWrapper.java:110)
org.eclipse.jetty.server.Server#handle(Server.java:349)
org.eclipse.jetty.server.HttpConnection#handleRequest(HttpConnection.java:441)
org.eclipse.jetty.server.HttpConnection$RequestHandler#headerComplete(HttpConnection.java:904)
org.eclipse.jetty.http.HttpParser#parseNext(HttpParser.java:565)
org.eclipse.jetty.http.HttpParser#parseAvailable(HttpParser.java:217)
org.eclipse.jetty.server.AsyncHttpConnection#handle(AsyncHttpConnection.java:46)
org.eclipse.jetty.io.nio.SelectChannelEndPoint#handle(SelectChannelEndPoint.java:545)
org.eclipse.jetty.io.nio.SelectChannelEndPoint$1#run(SelectChannelEndPoint.java:43)
org.eclipse.jetty.util.thread.QueuedThreadPool#runJob(QueuedThreadPool.java:598)
org.eclipse.jetty.util.thread.QueuedThreadPool$3#run(QueuedThreadPool.java:533)
java.lang.Thread#run(Thread.java:680)
java.lang.NullPointerException
org.apache.isis.viewer.wicket.model.models.EntityCollectionModel#createStandalone(EntityCollectionModel.java:152)
org.apache.isis.viewer.wicket.ui.components.actions.ActionPanel$ResultType$2#addOrReplaceCollectionResultsPanel(ActionPanel.java:361)
org.apache.isis.viewer.wicket.ui.components.actions.ActionPanel$ResultType$2#addResults(ActionPanel.java:357)
org.apache.isis.viewer.wicket.ui.components.actions.ActionPanel#executeActionOnTargetAndProcessResults(ActionPanel.java:186)
org.apache.isis.viewer.wicket.ui.components.actions.ActionPanel#executeActionAndProcessResults(ActionPanel.java:138)
org.apache.isis.viewer.wicket.ui.components.actions.ActionPanel#buildGui(ActionPanel.java:96)
org.apache.isis.viewer.wicket.ui.components.actions.ActionPanel#<init>(ActionPanel.java:89)
org.apache.isis.viewer.wicket.ui.components.actions.ActionPanelFactory#createComponent(ActionPanelFactory.java:49)
org.apache.isis.viewer.wicket.ui.ComponentFactoryAbstract#createComponent(ComponentFactoryAbstract.java:82)
org.apache.isis.viewer.wicket.viewer.registries.components.ComponentFactoryRegistryDefault#createComponent(ComponentFactoryRegistryDefault.java:120)
org.apache.isis.viewer.wicket.viewer.registries.components.ComponentFactoryRegistryDefault#addOrReplaceComponent(ComponentFactoryRegistryDefault.java:105)
org.apache.isis.viewer.wicket.ui.pages.PageAbstract#addComponent(PageAbstract.java:266)
org.apache.isis.viewer.wicket.ui.pages.PageAbstract#addChildComponents(PageAbstract.java:261)
org.apache.isis.viewer.wicket.ui.pages.action.ActionPage#<init>(ActionPage.java:54)
sun.reflect.NativeConstructorAccessorImpl#newInstance0(NativeConstructorAccessorImpl.java:-2)
sun.reflect.NativeConstructorAccessorImpl#newInstance(NativeConstructorAccessorImpl.java:39)
sun.reflect.DelegatingConstructorAccessorImpl#newInstance(DelegatingConstructorAccessorImpl.java:27)
java.lang.reflect.Constructor#newInstance(Constructor.java:513)
org.apache.wicket.session.DefaultPageFactory#newPage(DefaultPageFactory.java:170)
org.apache.wicket.session.DefaultPageFactory#newPage(DefaultPageFactory.java:98)
org.apache.wicket.DefaultMapperContext#newPageInstance(DefaultMapperContext.java:137)
org.apache.wicket.core.request.handler.PageProvider#resolvePageInstance(PageProvider.java:268)
org.apache.wicket.core.request.handler.PageProvider#getPageInstance(PageProvider.java:166)
org.apache.wicket.request.handler.render.PageRenderer#getPage(PageRenderer.java:78)
org.apache.wicket.request.handler.render.WebPageRenderer#renderPage(WebPageRenderer.java:94)
org.apache.wicket.request.handler.render.WebPageRenderer#respond(WebPageRenderer.java:196)
org.apache.wicket.core.request.handler.RenderPageRequestHandler#respond(RenderPageRequestHandler.java:165)
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor#respond(RequestCycle.java:854)
org.apache.wicket.request.RequestHandlerStack#execute(RequestHandlerStack.java:64)
org.apache.wicket.request.cycle.RequestCycle#execute(RequestCycle.java:254)
org.apache.wicket.request.cycle.RequestCycle#processRequest(RequestCycle.java:211)
org.apache.wicket.request.cycle.RequestCycle#processRequestAndDetach(RequestCycle.java:282)
org.apache.wicket.protocol.http.WicketFilter#processRequestCycle(WicketFilter.java:259)
org.apache.wicket.protocol.http.WicketFilter#processRequest(WicketFilter.java:201)
org.apache.wicket.protocol.http.WicketFilter#doFilter(WicketFilter.java:282)
org.eclipse.jetty.servlet.ServletHandler$CachedChain#doFilter(ServletHandler.java:1326)
org.apache.shiro.web.servlet.AbstractShiroFilter#executeChain(AbstractShiroFilter.java:449)
org.apache.shiro.web.servlet.AbstractShiroFilter$1#call(AbstractShiroFilter.java:365)
org.apache.shiro.subject.support.SubjectCallable#doCall(SubjectCallable.java:90)
org.apache.shiro.subject.support.SubjectCallable#call(SubjectCallable.java:83)
org.apache.shiro.subject.support.DelegatingSubject#execute(DelegatingSubject.java:383)
org.apache.shiro.web.servlet.AbstractShiroFilter#doFilterInternal(AbstractShiroFilter.java:362)
org.apache.shiro.web.servlet.OncePerRequestFilter#doFilter(OncePerRequestFilter.java:125)
org.eclipse.jetty.servlet.ServletHandler$CachedChain#doFilter(ServletHandler.java:1326)
org.eclipse.jetty.servlet.ServletHandler#doHandle(ServletHandler.java:479)
org.eclipse.jetty.server.handler.ScopedHandler#handle(ScopedHandler.java:119)
org.eclipse.jetty.security.SecurityHandler#handle(SecurityHandler.java:520)
org.eclipse.jetty.server.session.SessionHandler#doHandle(SessionHandler.java:227)
org.eclipse.jetty.server.handler.ContextHandler#doHandle(ContextHandler.java:940)
org.eclipse.jetty.servlet.ServletHandler#doScope(ServletHandler.java:409)
org.eclipse.jetty.server.session.SessionHandler#doScope(SessionHandler.java:186)
org.eclipse.jetty.server.handler.ContextHandler#doScope(ContextHandler.java:874)
org.eclipse.jetty.server.handler.ScopedHandler#handle(ScopedHandler.java:117)
org.eclipse.jetty.server.handler.ContextHandlerCollection#handle(ContextHandlerCollection.java:250)
org.eclipse.jetty.server.handler.HandlerCollection#handle(HandlerCollection.java:149)
org.eclipse.jetty.server.handler.HandlerWrapper#handle(HandlerWrapper.java:110)
org.eclipse.jetty.server.Server#handle(Server.java:349)
org.eclipse.jetty.server.HttpConnection#handleRequest(HttpConnection.java:441)
org.eclipse.jetty.server.HttpConnection$RequestHandler#headerComplete(HttpConnection.java:904)
org.eclipse.jetty.http.HttpParser#parseNext(HttpParser.java:565)
org.eclipse.jetty.http.HttpParser#parseAvailable(HttpParser.java:217)
org.eclipse.jetty.server.AsyncHttpConnection#handle(AsyncHttpConnection.java:46)
org.eclipse.jetty.io.nio.SelectChannelEndPoint#handle(SelectChannelEndPoint.java:545)
org.eclipse.jetty.io.nio.SelectChannelEndPoint$1#run(SelectChannelEndPoint.java:43)
org.eclipse.jetty.util.thread.QueuedThreadPool#runJob(QueuedThreadPool.java:598)
org.eclipse.jetty.util.thread.QueuedThreadPool$3#run(QueuedThreadPool.java:533)
java.lang.Thread#run(Thread.java:680)
So it seems that Isis is not properly recognizing the type enclosed on the List
represented by <DO>.
> Not properly recognizing Collections of generics as Action return type
> ----------------------------------------------------------------------
>
> Key: ISIS-483
> URL: https://issues.apache.org/jira/browse/ISIS-483
> Project: Isis
> Issue Type: Bug
> Components: Core
> Affects Versions: core-1.2.0
> Reporter: Oscar Bou
> Assignee: Oscar Bou
> Fix For: core-2.0.0
>
>
> Create a repository that inherits from a "generic" one, which implements a
> "generic" function like this:
> {code}
> public abstract class MyAbstractDomainObjectRepositoryAndFactory<DO extends
> MyAbstractDomainObject>
> extends AbstractFactoryAndRepository {
> public List<DO> listAll() {
> return this.allInstances(this.domainObjectClass);
> }
> ...
> }
> {code}
> Create a concrete implementation of the previous repository like this one,
> which introduces a new action/method:
> {code}
> public class DomainEntityClassCustomRepository extends
>
> AbstractMultiTenantEntityRepositoryAndFactory<DomainEntityClass> {
> ...
> public List<RiskRegister> listAllRiskRegisters() {
> return this.listAll();
> }
> ...
> }
> {code}
> And:
> DomainEntityClass inherits from MyAbstractDomainObject.
> If the "listAllRiskRegisters" action is invoked from the Wicket viewer it
> works perfectly, and a list of DomainEntityClass'es is shown.
> And if the list only contains 1 element, the "listAll" action also shows that
> element.
> But if the "listAll" action is invoked and the list contains more than 1
> element the following exception is thrown:
> {code}
> org.apache.wicket.WicketRuntimeException
> Can't instantiate page using constructor 'public
> org.apache.isis.viewer.wicket.ui.pages.action.ActionPage(org.apache.wicket.request.mapper.parameter.PageParameters)'
> and argument 'pageType=[ACTION], actionSingleResultsMode=[REDIRECT],
> objectOid=[com.company.DomainEntityClassCustomRepository:1],
> actionType=[USER],
> actionOwningSpec=[com.company.DomainEntityClassCustomRepository],
> actionId=[listAll()], pageTitle=[List All], actionMode=[RESULTS]'. Might be
> it doesn't exist, may be it is not visible (public).
> org.apache.wicket.session.DefaultPageFactory#newPage(DefaultPageFactory.java:193)
> org.apache.wicket.session.DefaultPageFactory#newPage(DefaultPageFactory.java:98)
> org.apache.wicket.DefaultMapperContext#newPageInstance(DefaultMapperContext.java:137)
> org.apache.wicket.core.request.handler.PageProvider#resolvePageInstance(PageProvider.java:268)
> org.apache.wicket.core.request.handler.PageProvider#getPageInstance(PageProvider.java:166)
> org.apache.wicket.request.handler.render.PageRenderer#getPage(PageRenderer.java:78)
> org.apache.wicket.request.handler.render.WebPageRenderer#renderPage(WebPageRenderer.java:94)
> org.apache.wicket.request.handler.render.WebPageRenderer#respond(WebPageRenderer.java:196)
> org.apache.wicket.core.request.handler.RenderPageRequestHandler#respond(RenderPageRequestHandler.java:165)
> org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor#respond(RequestCycle.java:854)
> org.apache.wicket.request.RequestHandlerStack#execute(RequestHandlerStack.java:64)
> org.apache.wicket.request.cycle.RequestCycle#execute(RequestCycle.java:254)
> org.apache.wicket.request.cycle.RequestCycle#processRequest(RequestCycle.java:211)
> org.apache.wicket.request.cycle.RequestCycle#processRequestAndDetach(RequestCycle.java:282)
> org.apache.wicket.protocol.http.WicketFilter#processRequestCycle(WicketFilter.java:259)
> org.apache.wicket.protocol.http.WicketFilter#processRequest(WicketFilter.java:201)
> org.apache.wicket.protocol.http.WicketFilter#doFilter(WicketFilter.java:282)
> org.eclipse.jetty.servlet.ServletHandler$CachedChain#doFilter(ServletHandler.java:1326)
> org.apache.shiro.web.servlet.AbstractShiroFilter#executeChain(AbstractShiroFilter.java:449)
> org.apache.shiro.web.servlet.AbstractShiroFilter$1#call(AbstractShiroFilter.java:365)
> org.apache.shiro.subject.support.SubjectCallable#doCall(SubjectCallable.java:90)
> org.apache.shiro.subject.support.SubjectCallable#call(SubjectCallable.java:83)
> org.apache.shiro.subject.support.DelegatingSubject#execute(DelegatingSubject.java:383)
> org.apache.shiro.web.servlet.AbstractShiroFilter#doFilterInternal(AbstractShiroFilter.java:362)
> org.apache.shiro.web.servlet.OncePerRequestFilter#doFilter(OncePerRequestFilter.java:125)
> org.eclipse.jetty.servlet.ServletHandler$CachedChain#doFilter(ServletHandler.java:1326)
> org.eclipse.jetty.servlet.ServletHandler#doHandle(ServletHandler.java:479)
> org.eclipse.jetty.server.handler.ScopedHandler#handle(ScopedHandler.java:119)
> org.eclipse.jetty.security.SecurityHandler#handle(SecurityHandler.java:520)
> org.eclipse.jetty.server.session.SessionHandler#doHandle(SessionHandler.java:227)
> org.eclipse.jetty.server.handler.ContextHandler#doHandle(ContextHandler.java:940)
> org.eclipse.jetty.servlet.ServletHandler#doScope(ServletHandler.java:409)
> org.eclipse.jetty.server.session.SessionHandler#doScope(SessionHandler.java:186)
> org.eclipse.jetty.server.handler.ContextHandler#doScope(ContextHandler.java:874)
> org.eclipse.jetty.server.handler.ScopedHandler#handle(ScopedHandler.java:117)
> org.eclipse.jetty.server.handler.ContextHandlerCollection#handle(ContextHandlerCollection.java:250)
> org.eclipse.jetty.server.handler.HandlerCollection#handle(HandlerCollection.java:149)
> org.eclipse.jetty.server.handler.HandlerWrapper#handle(HandlerWrapper.java:110)
> org.eclipse.jetty.server.Server#handle(Server.java:349)
> org.eclipse.jetty.server.HttpConnection#handleRequest(HttpConnection.java:441)
> org.eclipse.jetty.server.HttpConnection$RequestHandler#headerComplete(HttpConnection.java:904)
> org.eclipse.jetty.http.HttpParser#parseNext(HttpParser.java:565)
> org.eclipse.jetty.http.HttpParser#parseAvailable(HttpParser.java:217)
> org.eclipse.jetty.server.AsyncHttpConnection#handle(AsyncHttpConnection.java:46)
> org.eclipse.jetty.io.nio.SelectChannelEndPoint#handle(SelectChannelEndPoint.java:545)
> org.eclipse.jetty.io.nio.SelectChannelEndPoint$1#run(SelectChannelEndPoint.java:43)
> org.eclipse.jetty.util.thread.QueuedThreadPool#runJob(QueuedThreadPool.java:598)
> org.eclipse.jetty.util.thread.QueuedThreadPool$3#run(QueuedThreadPool.java:533)
> java.lang.Thread#run(Thread.java:680)
> java.lang.reflect.InvocationTargetException
> sun.reflect.NativeConstructorAccessorImpl#newInstance0(NativeConstructorAccessorImpl.java:-2)
> sun.reflect.NativeConstructorAccessorImpl#newInstance(NativeConstructorAccessorImpl.java:39)
> sun.reflect.DelegatingConstructorAccessorImpl#newInstance(DelegatingConstructorAccessorImpl.java:27)
> java.lang.reflect.Constructor#newInstance(Constructor.java:513)
> org.apache.wicket.session.DefaultPageFactory#newPage(DefaultPageFactory.java:170)
> org.apache.wicket.session.DefaultPageFactory#newPage(DefaultPageFactory.java:98)
> org.apache.wicket.DefaultMapperContext#newPageInstance(DefaultMapperContext.java:137)
> org.apache.wicket.core.request.handler.PageProvider#resolvePageInstance(PageProvider.java:268)
> org.apache.wicket.core.request.handler.PageProvider#getPageInstance(PageProvider.java:166)
> org.apache.wicket.request.handler.render.PageRenderer#getPage(PageRenderer.java:78)
> org.apache.wicket.request.handler.render.WebPageRenderer#renderPage(WebPageRenderer.java:94)
> org.apache.wicket.request.handler.render.WebPageRenderer#respond(WebPageRenderer.java:196)
> org.apache.wicket.core.request.handler.RenderPageRequestHandler#respond(RenderPageRequestHandler.java:165)
> org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor#respond(RequestCycle.java:854)
> org.apache.wicket.request.RequestHandlerStack#execute(RequestHandlerStack.java:64)
> org.apache.wicket.request.cycle.RequestCycle#execute(RequestCycle.java:254)
> org.apache.wicket.request.cycle.RequestCycle#processRequest(RequestCycle.java:211)
> org.apache.wicket.request.cycle.RequestCycle#processRequestAndDetach(RequestCycle.java:282)
> org.apache.wicket.protocol.http.WicketFilter#processRequestCycle(WicketFilter.java:259)
> org.apache.wicket.protocol.http.WicketFilter#processRequest(WicketFilter.java:201)
> org.apache.wicket.protocol.http.WicketFilter#doFilter(WicketFilter.java:282)
> org.eclipse.jetty.servlet.ServletHandler$CachedChain#doFilter(ServletHandler.java:1326)
> org.apache.shiro.web.servlet.AbstractShiroFilter#executeChain(AbstractShiroFilter.java:449)
> org.apache.shiro.web.servlet.AbstractShiroFilter$1#call(AbstractShiroFilter.java:365)
> org.apache.shiro.subject.support.SubjectCallable#doCall(SubjectCallable.java:90)
> org.apache.shiro.subject.support.SubjectCallable#call(SubjectCallable.java:83)
> org.apache.shiro.subject.support.DelegatingSubject#execute(DelegatingSubject.java:383)
> org.apache.shiro.web.servlet.AbstractShiroFilter#doFilterInternal(AbstractShiroFilter.java:362)
> org.apache.shiro.web.servlet.OncePerRequestFilter#doFilter(OncePerRequestFilter.java:125)
> org.eclipse.jetty.servlet.ServletHandler$CachedChain#doFilter(ServletHandler.java:1326)
> org.eclipse.jetty.servlet.ServletHandler#doHandle(ServletHandler.java:479)
> org.eclipse.jetty.server.handler.ScopedHandler#handle(ScopedHandler.java:119)
> org.eclipse.jetty.security.SecurityHandler#handle(SecurityHandler.java:520)
> org.eclipse.jetty.server.session.SessionHandler#doHandle(SessionHandler.java:227)
> org.eclipse.jetty.server.handler.ContextHandler#doHandle(ContextHandler.java:940)
> org.eclipse.jetty.servlet.ServletHandler#doScope(ServletHandler.java:409)
> org.eclipse.jetty.server.session.SessionHandler#doScope(SessionHandler.java:186)
> org.eclipse.jetty.server.handler.ContextHandler#doScope(ContextHandler.java:874)
> org.eclipse.jetty.server.handler.ScopedHandler#handle(ScopedHandler.java:117)
> org.eclipse.jetty.server.handler.ContextHandlerCollection#handle(ContextHandlerCollection.java:250)
> org.eclipse.jetty.server.handler.HandlerCollection#handle(HandlerCollection.java:149)
> org.eclipse.jetty.server.handler.HandlerWrapper#handle(HandlerWrapper.java:110)
> org.eclipse.jetty.server.Server#handle(Server.java:349)
> org.eclipse.jetty.server.HttpConnection#handleRequest(HttpConnection.java:441)
> org.eclipse.jetty.server.HttpConnection$RequestHandler#headerComplete(HttpConnection.java:904)
> org.eclipse.jetty.http.HttpParser#parseNext(HttpParser.java:565)
> org.eclipse.jetty.http.HttpParser#parseAvailable(HttpParser.java:217)
> org.eclipse.jetty.server.AsyncHttpConnection#handle(AsyncHttpConnection.java:46)
> org.eclipse.jetty.io.nio.SelectChannelEndPoint#handle(SelectChannelEndPoint.java:545)
> org.eclipse.jetty.io.nio.SelectChannelEndPoint$1#run(SelectChannelEndPoint.java:43)
> org.eclipse.jetty.util.thread.QueuedThreadPool#runJob(QueuedThreadPool.java:598)
> org.eclipse.jetty.util.thread.QueuedThreadPool$3#run(QueuedThreadPool.java:533)
> java.lang.Thread#run(Thread.java:680)
> java.lang.NullPointerException
> org.apache.isis.viewer.wicket.model.models.EntityCollectionModel#createStandalone(EntityCollectionModel.java:152)
> org.apache.isis.viewer.wicket.ui.components.actions.ActionPanel$ResultType$2#addOrReplaceCollectionResultsPanel(ActionPanel.java:361)
> org.apache.isis.viewer.wicket.ui.components.actions.ActionPanel$ResultType$2#addResults(ActionPanel.java:357)
> org.apache.isis.viewer.wicket.ui.components.actions.ActionPanel#executeActionOnTargetAndProcessResults(ActionPanel.java:186)
> org.apache.isis.viewer.wicket.ui.components.actions.ActionPanel#executeActionAndProcessResults(ActionPanel.java:138)
> org.apache.isis.viewer.wicket.ui.components.actions.ActionPanel#buildGui(ActionPanel.java:96)
> org.apache.isis.viewer.wicket.ui.components.actions.ActionPanel#<init>(ActionPanel.java:89)
> org.apache.isis.viewer.wicket.ui.components.actions.ActionPanelFactory#createComponent(ActionPanelFactory.java:49)
> org.apache.isis.viewer.wicket.ui.ComponentFactoryAbstract#createComponent(ComponentFactoryAbstract.java:82)
> org.apache.isis.viewer.wicket.viewer.registries.components.ComponentFactoryRegistryDefault#createComponent(ComponentFactoryRegistryDefault.java:120)
> org.apache.isis.viewer.wicket.viewer.registries.components.ComponentFactoryRegistryDefault#addOrReplaceComponent(ComponentFactoryRegistryDefault.java:105)
> org.apache.isis.viewer.wicket.ui.pages.PageAbstract#addComponent(PageAbstract.java:266)
> org.apache.isis.viewer.wicket.ui.pages.PageAbstract#addChildComponents(PageAbstract.java:261)
> org.apache.isis.viewer.wicket.ui.pages.action.ActionPage#<init>(ActionPage.java:54)
> sun.reflect.NativeConstructorAccessorImpl#newInstance0(NativeConstructorAccessorImpl.java:-2)
> sun.reflect.NativeConstructorAccessorImpl#newInstance(NativeConstructorAccessorImpl.java:39)
> sun.reflect.DelegatingConstructorAccessorImpl#newInstance(DelegatingConstructorAccessorImpl.java:27)
> java.lang.reflect.Constructor#newInstance(Constructor.java:513)
> org.apache.wicket.session.DefaultPageFactory#newPage(DefaultPageFactory.java:170)
> org.apache.wicket.session.DefaultPageFactory#newPage(DefaultPageFactory.java:98)
> org.apache.wicket.DefaultMapperContext#newPageInstance(DefaultMapperContext.java:137)
> org.apache.wicket.core.request.handler.PageProvider#resolvePageInstance(PageProvider.java:268)
> org.apache.wicket.core.request.handler.PageProvider#getPageInstance(PageProvider.java:166)
> org.apache.wicket.request.handler.render.PageRenderer#getPage(PageRenderer.java:78)
> org.apache.wicket.request.handler.render.WebPageRenderer#renderPage(WebPageRenderer.java:94)
> org.apache.wicket.request.handler.render.WebPageRenderer#respond(WebPageRenderer.java:196)
> org.apache.wicket.core.request.handler.RenderPageRequestHandler#respond(RenderPageRequestHandler.java:165)
> org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor#respond(RequestCycle.java:854)
> org.apache.wicket.request.RequestHandlerStack#execute(RequestHandlerStack.java:64)
> org.apache.wicket.request.cycle.RequestCycle#execute(RequestCycle.java:254)
> org.apache.wicket.request.cycle.RequestCycle#processRequest(RequestCycle.java:211)
> org.apache.wicket.request.cycle.RequestCycle#processRequestAndDetach(RequestCycle.java:282)
> org.apache.wicket.protocol.http.WicketFilter#processRequestCycle(WicketFilter.java:259)
> org.apache.wicket.protocol.http.WicketFilter#processRequest(WicketFilter.java:201)
> org.apache.wicket.protocol.http.WicketFilter#doFilter(WicketFilter.java:282)
> org.eclipse.jetty.servlet.ServletHandler$CachedChain#doFilter(ServletHandler.java:1326)
> org.apache.shiro.web.servlet.AbstractShiroFilter#executeChain(AbstractShiroFilter.java:449)
> org.apache.shiro.web.servlet.AbstractShiroFilter$1#call(AbstractShiroFilter.java:365)
> org.apache.shiro.subject.support.SubjectCallable#doCall(SubjectCallable.java:90)
> org.apache.shiro.subject.support.SubjectCallable#call(SubjectCallable.java:83)
> org.apache.shiro.subject.support.DelegatingSubject#execute(DelegatingSubject.java:383)
> org.apache.shiro.web.servlet.AbstractShiroFilter#doFilterInternal(AbstractShiroFilter.java:362)
> org.apache.shiro.web.servlet.OncePerRequestFilter#doFilter(OncePerRequestFilter.java:125)
> org.eclipse.jetty.servlet.ServletHandler$CachedChain#doFilter(ServletHandler.java:1326)
> org.eclipse.jetty.servlet.ServletHandler#doHandle(ServletHandler.java:479)
> org.eclipse.jetty.server.handler.ScopedHandler#handle(ScopedHandler.java:119)
> org.eclipse.jetty.security.SecurityHandler#handle(SecurityHandler.java:520)
> org.eclipse.jetty.server.session.SessionHandler#doHandle(SessionHandler.java:227)
> org.eclipse.jetty.server.handler.ContextHandler#doHandle(ContextHandler.java:940)
> org.eclipse.jetty.servlet.ServletHandler#doScope(ServletHandler.java:409)
> org.eclipse.jetty.server.session.SessionHandler#doScope(SessionHandler.java:186)
> org.eclipse.jetty.server.handler.ContextHandler#doScope(ContextHandler.java:874)
> org.eclipse.jetty.server.handler.ScopedHandler#handle(ScopedHandler.java:117)
> org.eclipse.jetty.server.handler.ContextHandlerCollection#handle(ContextHandlerCollection.java:250)
> org.eclipse.jetty.server.handler.HandlerCollection#handle(HandlerCollection.java:149)
> org.eclipse.jetty.server.handler.HandlerWrapper#handle(HandlerWrapper.java:110)
> org.eclipse.jetty.server.Server#handle(Server.java:349)
> org.eclipse.jetty.server.HttpConnection#handleRequest(HttpConnection.java:441)
> org.eclipse.jetty.server.HttpConnection$RequestHandler#headerComplete(HttpConnection.java:904)
> org.eclipse.jetty.http.HttpParser#parseNext(HttpParser.java:565)
> org.eclipse.jetty.http.HttpParser#parseAvailable(HttpParser.java:217)
> org.eclipse.jetty.server.AsyncHttpConnection#handle(AsyncHttpConnection.java:46)
> org.eclipse.jetty.io.nio.SelectChannelEndPoint#handle(SelectChannelEndPoint.java:545)
> org.eclipse.jetty.io.nio.SelectChannelEndPoint$1#run(SelectChannelEndPoint.java:43)
> org.eclipse.jetty.util.thread.QueuedThreadPool#runJob(QueuedThreadPool.java:598)
> org.eclipse.jetty.util.thread.QueuedThreadPool$3#run(QueuedThreadPool.java:533)
> java.lang.Thread#run(Thread.java:680)
> {code}
> So it seems that Isis is not properly recognizing the type enclosed on the
> List represented by <DO>.
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