ConcurrentModificationException
I have some markup:
<f:view>
<a4j:form styleClass="general_form">
<fieldset class="general_form_fieldset">
<legend class="general_form_legend">
<h:outputText value="#{messages.booking_fieldset_resources}" />
</legend>
<s:validateAll>
<div>
<center>
<rich:dataTable id="resourceAddedTable" var="eachResource" value="#{bookingResources}">
<rich:column>
<f:facet name="header">
<h:outputText value="#{messages.booking_resource_column_header}" />
</f:facet>
<h:outputText value="#{messages[eachResource.inlLabel]}" />
</rich:column>
<rich:column>
<f:facet name="header">
<h:outputText value="#{messages.booking_action_column_header}" />
</f:facet>
<a4j:commandButton styleClass="general_form_button"
action="#{bookingController.removeResource(eachResource)}"
value="#{messages.general_button_remove}" type="submit" reRender="resourceAddedTable">
</a4j:commandButton>
</rich:column>
</rich:dataTable>
</center>
</div>
<div>
<rich:messages id="resourceAdditionAttemptMessages" errorClass="error" warnClass="warn"
infoClass="info" for="resourceAddedTable" />
</div>
<div>
<br />
</div>
<div>
<a4j:commandButton id="addResidentTrainer" value="#{messages.resource_resident_trainer}"
action="#{bookingController.addResource('resource_resident_trainer')}"
reRender="resourceAddedTable, resourceAdditionAttemptMessages" />
The table is simple updated by the back end when you click add.
When you click remove its supposed to remove the item from the list.
However.. I get
Caused by: java.util.ConcurrentModificationException at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372) at java.util.AbstractList$Itr.next(AbstractList.java:343)
@DataModel
private List<ResourceKind> bookingResources;
...
/* (non-Javadoc)
* @see nz.co.selwynequestriancentre.action.booking.BookingController#addResource(java.lang.String)
*/
public String addResource(String resource) {
log.info(">addResource " + resource);
ResourceKind resourceKind = resourceHelper.getResourceKind(resource);
boolean isAlreadyAdded = false;
for (ResourceKind eachExistingResourceKind : bookingResources) {
if (resourceKind.getInlLabel().equalsIgnoreCase(eachExistingResourceKind.getInlLabel())) {
facesMessages.addToControlFromResourceBundle("resourceAdditionAttemptMessages", FacesMessage.SEVERITY_ERROR, "booking_resource_already_added");
isAlreadyAdded = true;
}
}
if (!isAlreadyAdded) {
bookingResources.add(resourceKind);
}
log.info("<addResource");
return null;
}
/* (non-Javadoc)
* @see nz.co.selwynequestriancentre.action.booking.BookingController#removeResource(nz.co.selwynequestriancentre.model.entity.Resource.ResourceKind)
*/
public String removeResource(ResourceKind resourceKind) {
for (ResourceKind eachExistingResourceKind : bookingResources) {
if (resourceKind.getInlLabel().equalsIgnoreCase(eachExistingResourceKind.getInlLabel())) {
bookingResources.remove(resourceKind);
}
}
return null;
}
...
Any ideas?