The class SortableDataProvider throws a NPE. The PersonService and the
GUIService that should be getting injected both end up being null values.
I've tried both annotations @Autowired and @SpringBean. Neither seems to
work.
I turned on logging and I can see in the log that SortableDataProvider being
injected but obviously it isn't happening.
Not sure how to diagnose this problem? Any Ideas?
Lee
Here is the SortableDataProvider Class:
package org.seelink.web2.ui.user;
import
org.apache.wicket.extensions.markup.html.repeater.util.SortableDataProvider;
import org.apache.wicket.model.IModel;
import org.seelink.web2.model.role.Person;
import org.seelink.web2.serv.GuiService;
import org.seelink.web2.serv.PersonService;
import org.seelink.web2.ui.appadm.DetachablePersonModel;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import java.io.Serializable;
import java.util.Iterator;
/**
* Created by IntelliJ IDEA.
* User: lchalupa
* Date: 1/12/11
* Time: 4:31 PM
* To change this template use File | Settings | File Templates.
*/
@Component("sortablePersonDataProvider")
public class SortablePersonDataProvider extends SortableDataProvider<Person>
implements Serializable{
@Autowired(required=true)
private PersonService personService;
@Autowired(required=true)
private GuiService guiService;
/**
* constructor
*/
public SortablePersonDataProvider() {
// set default sort
setSort("lastName", true);
}
/**
* @see
org.apache.wicket.markup.repeater.data.IDataProvider#iterator(int, int)
*/
public Iterator<Person> iterator(int first, int count) {
return getPersonService().findPersonSubset(first, count, getSort());
}
/**
* @see org.apache.wicket.markup.repeater.data.IDataProvider#size()
*/
public int size() {
if (personService == null ) throw new
RuntimeException("personService is null value");
return getPersonService().personCount();
}
/**
* @see
org.apache.wicket.markup.repeater.data.IDataProvider#model(java.lang.Object)
*/
public IModel<Person> model(Person object) {
return new DetachablePersonModel(object);
}
public PersonService getPersonService() {
System.out.println("Person Service getter");
return personService;
}
public void setPersonService(PersonService personService) {
this.personService = personService;
System.out.println("Person Service setter");
}
public GuiService getGuiService() {
System.out.println("Gui Service getter");
return guiService;
}
public void setGuiService(GuiService guiService) {
this.guiService = guiService;
System.out.println("Gui Service setter");
}
}
Here is the stackTrace:
Caused by: java.lang.NullPointerException
at
org.seelink.web2.ui.user.SortablePersonDataProvider.iterator(SortablePersonDataProvider.java:47)
at
org.apache.wicket.markup.repeater.data.DataViewBase$ModelIterator.<init>(DataViewBase.java:109)
at
org.apache.wicket.markup.repeater.data.DataViewBase.getItemModels(DataViewBase.java:76)
at
org.apache.wicket.markup.repeater.AbstractPageableView.getItemModels(AbstractPageableView.java:107)
at
org.apache.wicket.markup.repeater.RefreshingView.onPopulate(RefreshingView.java:94)
at
org.apache.wicket.markup.repeater.AbstractRepeater.onBeforeRender(AbstractRepeater.java:131)
at
org.apache.wicket.markup.repeater.AbstractPageableView.onBeforeRender(AbstractPageableView.java:121)
at
org.apache.wicket.Component.internalBeforeRender(Component.java:1073)
at org.apache.wicket.Component.beforeRender(Component.java:1107)
at
org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1753)
Here is the log entries that show the Beans getting injected:
DEBUG - DefaultListableBeanFactory - Creating shared instance of singleton
bean 'sortablePersonDataProvider'
DEBUG - DefaultListableBeanFactory - Creating instance of bean
'sortablePersonDataProvider'
DEBUG - InjectionMetadata - Found injected element on class
[org.seelink.web2.ui.user.SortablePersonDataProvider]: AutowiredFieldElement
for private org.seelink.web2.serv.PersonService
org.seelink.web2.ui.user.SortablePersonDataProvider.personService
DEBUG - InjectionMetadata - Found injected element on class
[org.seelink.web2.ui.user.SortablePersonDataProvider]: AutowiredFieldElement
for private org.seelink.web2.serv.GuiService
org.seelink.web2.ui.user.SortablePersonDataProvider.guiService
DEBUG - DefaultListableBeanFactory - Eagerly caching bean
'sortablePersonDataProvider' to allow for resolving potential circular
references
DEBUG - InjectionMetadata - Processing injected method of bean
'sortablePersonDataProvider': AutowiredFieldElement for private
org.seelink.web2.serv.PersonService
org.seelink.web2.ui.user.SortablePersonDataProvider.personService
DEBUG - DefaultListableBeanFactory - Returning cached instance of singleton
bean 'personService'
DEBUG - nnotationBeanPostProcessor - Autowiring by type from bean name
'sortablePersonDataProvider' to bean named 'personService'
DEBUG - InjectionMetadata - Processing injected method of bean
'sortablePersonDataProvider': AutowiredFieldElement for private
org.seelink.web2.serv.GuiService
org.seelink.web2.ui.user.SortablePersonDataProvider.guiService
DEBUG - DefaultListableBeanFactory - Returning cached instance of singleton
bean 'guiServiceImpl'
DEBUG - nnotationBeanPostProcessor - Autowiring by type from bean name
'sortablePersonDataProvider' to bean named 'guiServiceImpl'
DEBUG - DefaultListableBeanFactory - Returning cached instance of singleton
bean 'org.springframework.transaction.config.internalTransactionAdvisor'
DEBUG - DefaultListableBeanFactory - Finished creating instance of bean
'sortablePersonDataProvider'
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