I can't get the ternary statement you provided to compile correctly
using 1.4-M1. The error I get is:
The type AbstractChoice<T,E> is not visible
Due to the fact that the common ancestor for ListMultipleChoice and
ListChoice is the inaccessible package protected object AbstractChoice.
This is caused by the behavior of ternary assignment where, if the
second and third operands are of different reference types, then it must
be possible to convert one of the types to the other type (call this
latter type T) by assignment conversion; the type of the conditional
expression is T. It is a compile-time error if neither type is
assignment compatible with the other type. This is copied verbatim from
http://java.sun.com/docs/books/jls/second_edition/html/expressions.doc.h
tml#290293
Casting one of the new statements to FormComponent allows the statement
to compile and run without error for me:
FormComponent o = false
? (FormComponent) new ListMultipleChoice("",
new Model(), Collections.EMPTY_LIST, (IChoiceRenderer) null)
: new ListChoice("",
new Model(), Collections.EMPTY_LIST, (IChoiceRenderer)
null).setNullValid(true);
I imagine it may correct the runtime error you are seeing too.
-----Original Message-----
From: Martin Makundi [mailto:[EMAIL PROTECTED]
Sent: Sunday, May 18, 2008 3:56 AM
To: users@wicket.apache.org
Subject: Re: Wicket java.lang.IllegalAccessError bug?
Yap. If you rephrase it into ifs (or change ternary false state into
true) it works fine.
**
Martin
2008/5/18 Johan Compagner <[EMAIL PROTECTED]>:
> I have no idea what could cause that suddenly in 1.4
> Maybe something that java 5 source compiler does?
> But a simple if works fine?
>
> On 5/17/08, Martin Makundi <[EMAIL PROTECTED]> wrote:
>> Hi!
>>
>> I just upgraded from 1.3.1 to 1.4-m1 and I received the strangest of
errors.
>>
>> Has anyone had the same experience below? This occurs only with the
>> ternary operator, probably because both elements get initialized at
>> runtime:
>>
>> public class AnyPage extends WebPage {
>>
>> public AnyPage() {
>> // I wanted to use a ternary operator to choose between rendering
>> a listchoice or a multiplelistchoice.
>> // This worked in 1.3.1 but not in 1.4-m1 anymore. The JVM used
is
>> 1.6.0_04 with jetty 6.1.0
>>
>> // ....
>>
>> Object o = false
>> ? new ListMultipleChoice("",
>> new Model(), Collections.EMPTY_LIST, (IChoiceRenderer) null)
>> : new ListChoice("",
>> new Model(), Collections.EMPTY_LIST, (IChoiceRenderer)
>> null).setNullValid(true);
>>
>> // ....
>> }
>> }
>>
>> Throws a nasty exception:
>>
>> 2008-05-17 16:57:23,531 67447 [btpool0-8] ERROR RequestCycle - Can't
>> instantiate page using constructor public wicket.quickstart.AnyPage()
>> org.apache.wicket.WicketRuntimeException: Can't instantiate page
using
>> constructor public wicket.quickstart.AnyPage()
>> at
>>
org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.
java:168)
>> at
>>
org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.
java:58)
>> at
>>
org.apache.wicket.request.target.component.BookmarkablePageRequestTarget
.newPage(BookmarkablePageRequestTarget.java:262)
>> at
>>
org.apache.wicket.request.target.component.BookmarkablePageRequestTarget
.getPage(BookmarkablePageRequestTarget.java:283)
>> at
>>
org.apache.wicket.request.target.component.BookmarkablePageRequestTarget
.processEvents(BookmarkablePageRequestTarget.java:210)
>> at
>>
org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(Ab
stractRequestCycleProcessor.java:91)
>> at
>>
org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java
:1174)
>> at org.apache.wicket.RequestCycle.step(RequestCycle.java:1251)
>> at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1352)
>> at
org.apache.wicket.RequestCycle.request(RequestCycle.java:499)
>> at
>>
org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:375
)
>> at
>>
org.apache.wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:1
24)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
>> at
>>
wicket.quickstart.SessionLeakWorkaroundServlet.service(SessionLeakWorkar
ound.java:57)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
>> at
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:491)
>> at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:367)
>> at
>>
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:1
85)
>> at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>> at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:689)
>> at
org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:391)
>> at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
>> at org.mortbay.jetty.Server.handle(Server.java:285)
>> at
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:457)
>> at
>>
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConne
ction.java:751)
>> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:500)
>> at
org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:209)
>> at
org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:357)
>> at
>>
org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.jav
a:217)
>> at
>>
org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.ja
va:442)
>> Caused by: java.lang.reflect.InvocationTargetException
>> at
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>> at
sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
>> at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown
>> Source)
>> at java.lang.reflect.Constructor.newInstance(Unknown Source)
>> at
>>
org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.
java:149)
>> ... 29 more
>> Caused by: java.lang.IllegalAccessError: tried to access class
>> org.apache.wicket.markup.html.form.AbstractChoice from class
>> wicket.quickstart.AnyPage
>> at wicket.quickstart.AnyPage.<init>(AnyPage.java:69)
>> ... 34 more
>>
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