That error can be caused by trying to define a class in classloader which
already contains a class with the same name. I believe that Tapestry does
some magic with the component base classes when it is extending them...
maybe there is something causing Tapestry to try and recreate the base class
twice?
On Dec 21, 2007 10:37 AM, Britske <[EMAIL PROTECTED]> wrote:
>
> As an addition:
>
> also pointing out what type of errors are likely to cause these errors
> would
> help.
> I know that mixing injection with components can give loader constraints,
> which is why i created an interface for SuperPage. Moreover, I can
> mimagine
> that cyclic references would cause errors as well. Are there any others
> that
> I should track in my code?
>
> Thanks again,
> Geert-Jan
>
>
> Britske wrote:
> >
> > I'm going slightly insane on this one..
> > that's because everything worked fine, and after some slight
> modifications
> > (none that could cause such errors I believe) I can't backtrack anymore
> > where things went wrong.
> >
> > The error I'm getting is this:
> >
> > Could not convert 'page.quickNavigation' into a component parameter
> > binding: java.lang.LinkageError: Class
> > com/wrappt/aroer/base/AbstractNavigationContainer violates loader
> > constraints.
> > for full stack-trace see entirely below.
> >
> > location
> > classpath:com/wrappt/aroer/components/BaseLayout.tml, line 122,
> column
> > 77
> > 117 <div class="h plain">
> > 118 <h2>Verfijn de resultaten</h2>
> > 119 </div>
> > 120 <div class="c">
> > 121 <!-- <t:quickForm t:id="quickForm"/>-->
> > 122 <t:delegate t:id="quickFormDelegate" t:to="
> page.quickNavigation"/>
> > <-- here it happens
> > 123 </div>
> > 124 <div class="f"> </div>
> > 125 </div>
> > 126 </div>
> > 127 </div>
> >
> > the setup is not that simple, but here it goes anyway:
> >
> > - baselayout is a basic layout that wraps all pages as implemented in an
> > abstract class called superPage.
> > - all pages extend SuperPage.
> > - SuperPage implements ISuperPage (for mixing services with components)
> > - all pages have a quicknavigation component , although their
> > implementation can be different.
> > - each quickNavigation-component inherits from
> AbstractNavigationContainer
> > (which is where the loader constraint happens)
> >
> > the relevant parts:
> >
> > BaseLayout
> > ----------------------
> > @Parameter(required = true)
> > private ISuperPage page;
> > public ISuperPage getPage()
> > {
> > return (ISuperPage)page;
> > }
> >
> >
> > SuperPage (implements ISuperPage)
> > --------------
> > @Component(parameters={"page=this"})
> > private BaseLayout bl;
> >
> > public abstract AbstractNavigationContainer getQuickNavigation();
> >
> > Aanbiedingen extends SuperPage
> > ----------------------------------
> > @Component private QuickFormAllResults quickNavigation;
> > public QuickFormAllResults getQuickNavigation() {
> > return this.quickNavigation;
> > }
> >
> > Aanbiedingen.tml
> > ----------------------
> > <t:baselayout t:id="bl"
> > xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd";>
> > <t:block>
> > <t:quickformallresults t:id="quickNavigation"/>
> > </t:block>
> > ...
> > </t:baselayout>
> >
> > and finally:
> > QuickFormAllResults extends AbstractNavigationContainer
> > ---------------------
> > // nothing intersteing here
> >
> >
> > AbstractNavigationContainer
> > -------------------------------
> > public SuperPage getPage()
> > {
> > ..... //uses componentresources to recursively traverse the tree
> upwards
> > until it finds a componet
> > of type SuperPage and returns that..
> > }
> >
> >
> > I'm really out of options, as I can't seem to comment enough lines to
> make
> > it work: when i comment quicknavigation in baselayout.tml the error
> > simply shifts to another component that implements
> > AbstractNavigationContainer
> >
> > Thanks a lot for any help!
> > Geert-Jan
> >
> > p.s: i was on 5.0.7 SNAPSHOT and now back on 5.0.6
> >
> > stacktrace:
> > Caused by: java.lang.LinkageError: Class
> > com/wrappt/aroer/base/AbstractNavigationContainer violates loader
> > constraints
> > at java.lang.ClassLoader.defineClass1(Native Method)
> > at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
> > at
> > java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
> > at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
> > at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
> > at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
> > at java.security.AccessController.doPrivileged(Native Method)
> > at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
> > at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
> > at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
> > at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
> > at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
> > at java.lang.Class.getDeclaredMethods0(Native Method)
> > at java.lang.Class.privateGetDeclaredMethods(Class.java:2395)
> > at java.lang.Class.getDeclaredMethods(Class.java:1763)
> > at java.beans.Introspector$1.run(Introspector.java:1265)
> > at java.security.AccessController.doPrivileged(Native Method)
> > at
> > java.beans.Introspector.getPublicDeclaredMethods(Introspector.java:1263)
> > at java.beans.Introspector.getTargetMethodInfo(Introspector.java
> :1129)
> > at java.beans.Introspector.getBeanInfo(Introspector.java:387)
> > at java.beans.Introspector.getBeanInfo(Introspector.java:159)
> > at
> >
> org.apache.tapestry.ioc.internal.services.PropertyAccessImpl.buildAdapter(
> PropertyAccessImpl.java:85)
> > ... 72 more
> >
>
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