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From "Nico Krijnen (JIRA)" <>
Subject [jira] Created: (MYFACES-753) HtmlDataList.processDecodes processes its children twice
Date Wed, 26 Oct 2005 08:21:56 GMT
HtmlDataList.processDecodes processes its children twice

         Key: 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"
		<h:commandLink action="#{myBean.addItem}">
			<h:outputText value="add within list" />

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() && != item; pos++)
		orderItems.add(pos + 1, newItem);
	} else {

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