HtmlDataList.processDecodes processes its children twice
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Key: MYFACES-753
URL: http://issues.apache.org/jira/browse/MYFACES-753
Project: MyFaces
Type: Bug
Components: Tomahawk
Versions: 1.1.0, Nightly
Environment: MyFaces and Tomahawk 1.1.0 (and nightly build), Tiles
Reporter: Nico Krijnen
When using commandLinks in a dataList, their action methods are executed twice.
The problem seems to be caused by the processDecodes method in
org.apache.myfaces.custom.datalist.HtmlDataList. This method processes the
events for its children and then calls super.processDecodes, causing its
superclass to process its children once more. This way two action events are
queued.
When I comment out the call to super.processDecodes it all works as it should,
but I am unsure whether that might have any side effects.
processUpdates and processValidators seem to have the same processing
behaviour, I did not test them though, so I don't know if that causes any
problems.
The bug occurs in the following setup:
<t:dataList id="orderTest"
value="#{myBean.items}" var="item"
layout="unorderedList">
<h:column>
<h:commandLink action="#{myBean.addItem}">
<h:outputText value="add within list" />
</h:commandLink>
</h:column>
</t:dataList>
With the following corresponding methods in my backing bean:
public void addItem() {
SomeObject item = (SomeObject) FacesUtils.getManagedBean("item");
List items = getItems();
if (item != null) {
int pos = 0;
for (Iterator iter = items.iterator(); iter.hasNext() &&
iter.next() != item; pos++) {
}
orderItems.add(pos + 1, newItem);
} else {
orderItems.add(newItem);
}
}
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