[FLEX-24564] HierarchicalViewCursor.get current only catches RangeError, but ListCollectionView throws Error

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: Adobe Flex SDK 3.6 (Release)
• Component/s: Collections
• Environment: Affected OS(s): All OS Platforms; Language Found: English
• Assignee: Unassigned
• Reporter: Adobe JIRA
• Created: 21/Jul/10 20:12
• Updated: 21/Jul/10 20:12

Description

Sorry for not attaching example code, but the exact problem can be shown in the source code itself:

If HierarchicalViewCursor has its childNodes property set to be a ListCollectionView, and its currentChildIndex is -1, then on internal refresh, an error will be thrown that the developer cannot catch.

Error: Unknown Property: '-1'.
at mx.collections::ListCollectionView/http://www.adobe.com/2006/actionscript/flash/proxy::getProperty()[C:\autobuild\3.x\frameworks\projects\framework\src\mx\collections\ListCollectionView.as:740]
at mx.controls.treeClasses::HierarchicalViewCursor/get current()[C:\autobuild\3.x\frameworks\projects\framework\src\mx\controls\treeClasses\HierarchicalViewCursor.as:207]
at mx.controls.treeClasses::HierarchicalViewCursor/collectionChangeHandler()[C:\autobuild\3.x\frameworks\projects\framework\src\mx\controls\treeClasses\HierarchicalViewCursor.as:864]
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.controls.treeClasses::HierarchicalCollectionView/nestedCollectionChangeHandler()[C:\autobuild\3.x\frameworks\projects\framework\src\mx\controls\treeClasses\HierarchicalCollectionView.as:696]
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.collections::ListCollectionView/dispatchEvent()[C:\autobuild\3.x\frameworks\projects\framework\src\mx\collections\ListCollectionView.as:879]
at mx.collections::ListCollectionView/handlePropertyChangeEvents()[C:\autobuild\3.x\frameworks\projects\framework\src\mx\collections\ListCollectionView.as:1248]
at mx.collections::ListCollectionView/listChangeHandler()[C:\autobuild\3.x\frameworks\projects\framework\src\mx\collections\ListCollectionView.as:1120]
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.collections::ArrayList/internalDispatchEvent()[C:\autobuild\3.x\frameworks\projects\framework\src\mx\collections\ArrayList.as:528]
at mx.collections::ArrayList/itemUpdateHandler()[C:\autobuild\3.x\frameworks\projects\framework\src\mx\collections\ArrayList.as:554]

HierarchicalViewCursor only catches RangeError:
public function get current():Object
{
try
{
if (childIndexStack.length == 0)

{ return modelCursor.current; }

else

{ return childNodes[currentChildIndex]; }

}
catch(e:RangeError)
{
}
return null;
}

ListCollectionView throws Error if index is -1:
override flash_proxy function getProperty(name:):
{
if (name is QName)
name = name.localName;

var index:int = -1;
try

{ // If caller passed in a number such as 5.5, it will be floored. var n:Number = parseInt(String(name)); if (!isNaN(n)) index = int(n); }

catch(e:Error) // localName was not a number
{
}

if (index == -1)

{ var message:String = resourceManager.getString( "collections", "unknownProperty", [ name ]); throw new Error(message); }

else

{ return getItemAt(index); }

}