hi,
i have a form with a ForEach, and i would like to dynamically add/remove
elements from the underlying list. Adding an element works fine, but when
removing an element from the middle of the list, i get a
ConcurrentModificationException. I understand why this would occur - i'm
messing up the iterator that the ForEach is using.. However, i don't see
the way out from this. The Table component does something similar, but
it's a little complicated for me to figure it out based on it's
implementation...
any suggestions would be appreciated...
viktor
here's the page's source and definition (i cut out irrelevant details):
public class AddTimeslots extends BasePage {
private List timeslots;
private int selectedTimeslotIndex;
protected void initialize() {
super.initialize();
this.timeslots = new ArrayList();
this.timeslots.add( new DlvTimeslotModel() );
}
public void addTimeslot(IRequestCycle cycle){
if (this.validateTimeslots()) {
this.timeslots.add( new DlvTimeslotModel() );
}
}
public void setSelectedTimeslotIndex(int selectedTimeslotIndex) {
this.selectedTimeslotIndex = selectedTimeslotIndex;
}
public void deleteTimeslot(IRequestCycle cycle){
this.timeslots.remove(this.selectedTimeslotIndex);
}
private boolean validateTimeslots() {
// ... do validation
}
public List getTimeslots() {
return timeslots;
}
public int getTimeslotCount() {
return this.timeslots.size();
}
public void setTimeslotCount(int timeslotCount) {
this.timeslots.clear();
for (int i=0; i<timeslotCount; i++) {
this.timeslots.add( new DlvTimeslotModel() );
}
}
}
<page-specification class="com.freshdirect.dlvadmin.AddTimeslots">
<bean name="delegate" class="net.sf.tapestry.valid.ValidationDelegate"
lifecycle="request"/>
<component id="border" type="Border">
<static-binding name="title">Add Timeslot</static-binding>
</component>
<component id="forEachTimeslot" type="Foreach">
<binding name="source" expression='timeslots'/>
</component>
<component id="formAddSlot" type="Form">
<binding name="delegate" expression='beans.delegate'/>
<binding name="stateful" expression='false'/>
</component>
<component id="submitAddTimeslot" type="Submit">
<binding name="listener" expression='listeners.addTimeslot'/>
</component>
<component id="submitDeleteTimeslot" type="Submit">
<binding name="listener" expression='listeners.deleteTimeslot'/>
<binding name="selected" expression='selectedTimeslotIndex'/>
<binding name="tag" expression='components.forEachTimeslot.index'/>
</component>
<component id="timeslotCount" type="Hidden">
<binding name="value" expression='timeslotCount'/>
</component>
</page-specification>
--
[EMAIL PROTECTED]
--
http://fastmail.fm - Access your email from home and the web
-------------------------------------------------------
This sf.net email is sponsored by:ThinkGeek
Welcome to geek heaven.
http://thinkgeek.com/sf
_______________________________________________
Tapestry-developer mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/tapestry-developer
