I have a Tapestry 4 page that allows a user to select
a number between 1 to 5
from a PropertySelection component. For each new
selection, the page is redisplayed
with the selected number of TextFields using a For
component.
Clicking a button would compute the sum of the inputs.
This works in tapestry-4-beta-9, but not in
tapestry-4-beta-10.
With tapestry-4-beta-10, when I select a new number
from the drop down list and trigger a rewind,
I get the following error.
java.util.ConcurrentModificationException
Stack Trace:
*
java.util.AbstractList$Itr.checkForComodification(AbstractList.java:449)
*
java.util.AbstractList$Itr.next(AbstractList.java:420)
*
org.apache.tapestry.components.ForBean.findValueWithStringRepInIterator(ForBean.java:577)
*
org.apache.tapestry.components.ForBean.findValueWithStringRep(ForBean.java:550)
*
org.apache.tapestry.components.ForBean.getValueFromStringRep(ForBean.java:481)
*
org.apache.tapestry.components.ForBean$ReadSourceDataIterator.next(ForBean.java:311)
*
org.apache.tapestry.components.ForBean.renderComponent(ForBean.java:125)
*
org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:617)
*
org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:434)
*
org.apache.tapestry.form.FormSupportImpl.rewind(FormSupportImpl.java:542)
*
org.apache.tapestry.form.Form.renderComponent(Form.java:226)
*
org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:617)
*
org.apache.tapestry.form.Form.rewind(Form.java:327)
*
org.apache.tapestry.engine.RequestCycle.rewindForm(RequestCycle.java:441)
*
org.apache.tapestry.form.Form.trigger(Form.java:338)
The above mentioned page and source code is available
on
http://137.132.69.134/tapestry4Demo/app
under the section "sample code and technique".
I have noticed from the change log in Tapestry home
page, that the For component
has been changed in tapestry-4-beta-10. I have not had
time to look at the source code of
ForBean.java in detail yet. It would be appreciated if
someone could explain when has changed
in the For component from beta-9 to beta-10.
Thanks !
Shing
Home page :
http://uk.geocities.com/matmsh/index.html
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