[groovy-user] groovy wicket please tell me the problem
fachhoch
here is my groovy file
package gov.hhs.acf.web.util;
import java.util.ArrayList;
import java.util.List;
import org.apache.wicket.Component;
import org.apache.wicket.MarkupContainer;
import org.apache.wicket.markup.IMarkupResourceStreamProvider;
import org.apache.wicket.markup.html.link.Link;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.util.resource.IResourceStream;
import org.apache.wicket.util.resource.StringResourceStream;
class UserMenuItems implements MenuItems {
List<Component> components ;
void myInit(){
components= new ArrayList<Component>();
components.add (new OMBCircularPanel());
components.add (new SendComments());
}
@Override
public List<Component> getComponents() {
myInit();
return components;
}
private abstract class CustomPanel extends Panel implements
IMarkupResourceStreamProvider{
public CustomPanel() {
super(MenuItems.menuItemId);
}
public IResourceStream getMarkupResourceStream(MarkupContainer
container,Class<?> containerClass){
return new StringResourceStream(getMarkUp());
}
protected abstract String getMarkUp();
}
private class OMBCircularPanel extends CustomPanel {
public OMBCircularPanel() {
super();
}
@Override
protected String getMarkUp() {
return """
<wicket:panel>
http://www.whitehouse.gov/sites/default/files/omb/assets/a133/a133_revised_2007.pdf
A-133 OMB Circular
</wicket:panel>
""";
}
}
private class SendComments extends CustomPanel {
public SendComments() {
super();
}
@Override
protected String getMarkUp() {
return """
<wicket:panel>
mailto:comm...@gmail.com Send Comments
</wicket:panel>
""";
}
}
}
this is a simple class creating some wicket panels .
When I call getComponents , I get this exception
Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
at
gov.hhs.acf.web.util.UserMenuItems$OMBCircularPanel.<init>(UserMenuItems.groovy:48)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at
org.codehaus.groovy.reflection.CachedConstructor.invoke(CachedConstructor.java:77)
at
org.codehaus.groovy.runtime.callsite.ConstructorSite$ConstructorSiteNoUnwrapNoCoerce.callConstructor(ConstructorSite.java:107)
at
org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallConstructor(CallSiteArray.java:52)
at
org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:192)
at
org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:200)
at gov.hhs.acf.web.util.UserMenuItems.myInit(UserMenuItems.groovy:24)
at gov.hhs.acf.web.util.UserMenuItems$myInit.callCurrent(Unknown Source)
at
org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:44)
at
org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:143)
at
org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:147)
at
gov.hhs.acf.web.util.UserMenuItems.getComponents(UserMenuItems.groovy:30)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.wicket.proxy.LazyInitProxyFactory$JdkHandler.invoke(LazyInitProxyFactory.java:416)
at org.apache.wicket.proxy.$Proxy142.getComponents(Unknown Source)
at gov.hhs.acf.web.pages.common.BasePage.basePageInit(BasePage.java:164)
at gov.hhs.acf.web.pages.common.BasePage.<init>(BasePage.java:60)
at gov.hhs.acf.web.pages.common.HomePage.<init>(HomePage.java:40)
... 48 more
please somebody help me what is the error referring to, I donot have any
method called init I tried debugger and noticed the exception is thrown
before it reaches super class constructor
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Roshan Dawrani
fachhoch
with 1.7.2
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Paul King
>
> with 1.7.2
And which version of wicket?
Paul.
Paul King
>
> with 1.7.2
<init> is the constructor.
Running below on trunk in the GroovyConsole (i.e. not a web container)
fails as per the message below. I am not familiar with the wicket
lifecycle but it certainly seems to be getting to the super constructor
and the error not unreasonable given I haven't got a web container
in place.
Paul.
//////////////////////////
@Grab('org.apache.wicket:wicket:1.4.9')
@Grab('org.slf4j:slf4j-jdk14:1.6.1')
import org.apache.wicket.Component
import org.apache.wicket.MarkupContainer
import org.apache.wicket.markup.IMarkupResourceStreamProvider
import org.apache.wicket.markup.html.panel.Panel
import org.apache.wicket.util.resource.IResourceStream
import org.apache.wicket.util.resource.StringResourceStream
interface MenuItems { String menuItemId = 'dummy' }
class UserMenuItems implements MenuItems {
List<Component> components
void myInit(){
components = [new OMBCircularPanel(), new SendComments()]
}
List<Component> getComponents() {
myInit()
return components
}
private abstract class CustomPanel extends Panel implements IMarkupResourceStreamProvider {
public CustomPanel() {
super(MenuItems.menuItemId)
}
IResourceStream getMarkupResourceStream(MarkupContainer container, Class<?> containerClass){
return new StringResourceStream(getMarkUp())
}
protected abstract String getMarkUp()
}
private class OMBCircularPanel extends CustomPanel {
public OMBCircularPanel() {
super()
}
protected String getMarkUp() {
return """
<wicket:panel>
http://www.whitehouse.gov/sites/default/files/omb/assets/a133/a133_revised_2007.pdf
A-133 OMB Circular
</wicket:panel>
"""
}
}
private class SendComments extends CustomPanel {
public SendComments() {
super()
}
protected String getMarkUp() {
return """
<wicket:panel>
mailto:comm...@gmail.com Send Comments
</wicket:panel>
"""
}
}
}
println new UserMenuItems().components
//////////////////////////
produces this result:
org.apache.wicket.WicketRuntimeException: There is no application attached to current thread Thread-17
at org.apache.wicket.Application.get(Application.java:179)
at org.apache.wicket.Component.getApplication(Component.java:1323)
at org.apache.wicket.Component.<init>(Component.java:920)
at org.apache.wicket.MarkupContainer.<init>(MarkupContainer.java:113)
at org.apache.wicket.markup.html.WebMarkupContainer.<init>(WebMarkupContainer.java:49)
at org.apache.wicket.markup.html.WebMarkupContainerWithAssociatedMarkup.<init>(WebMarkupContainerWithAssociatedMarkup.java:51)
at org.apache.wicket.markup.html.WebMarkupContainerWithAssociatedMarkup.<init>(WebMarkupContainerWithAssociatedMarkup.java:43)
at org.apache.wicket.markup.html.panel.Panel.<init>(Panel.java:76)
at UserMenuItems$CustomPanel.<init>(ConsoleScript14:27)
...
fachhoch
wicket version 1.4.8
that error is from wicket becasue, Components cannot be instanaited without
an Application instantiated .
it is supposed to be called after Application is instantiated.
I call the getComponents method inside a page (this means Applciation is
instantiated),
the same code works when I make it .java why is it not working with groovy
?
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fachhoch
the code works when I make it .java and does not work with .groovy , I want
this as groovy becasue I want to dynamically load MenuItems and chaange
them without restarting the server , please help me wicket -groovy gurus
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fachhoch
I changed the code
instead of using OMBCircularPanel I changed it to
Panel panel= new CustomPanel(){
protected String getMarkUp() {return """
<wicket:panel>
http://www.whitehouse.gov/sites/default/files/omb/assets/a133/a133_revised_2007.pdf
A-133 OMB Circular
</wicket:panel>
"""};
}
and then call components.add (panel); and the code works without any
problems
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