XmlReader Plugin Behavior

Classic Servoy
1

What, exactly, does the following code return, if there are no child nodes?

nodes = XmlNode.getChildNodes( nodeObject )

The reason I am asking…

I wrote a method to traverse an xml data object using recursion (the method calls itself). The first thing the method checks is whether XmlNode[ 0 ].getChildNodes() returns a null value, and, if so, ends (returns) that instance of the method. The problem is that I get duplicate nodes. Empirically, I discovered that I must test the no-child node this way:

if ( arrayChildNodes[ 0 ].getName != '#text' )

to detect when getChildNodes() returns no child nodes.

The method works with the ‘fix’, but I am curious why it does not detect a null value.

Does anyone have any experience with this Plugin that could explain what is happening?

Thanks!

2

there is no such thing as XmlNode.getChildNodes( nodeObject )

but only

nodeObject.getChildNodes()

that one will return an empty array if there are no childs.

3

My apologies, my mistake in posting…the parent node is passed to the recursive method, the child nodes are extracted into an array, then the test follows:

This code works:

function getChildNode()
{
    var parentNode = arguments[ 0 ]
                             
    var arrayChildNodes = parentNode.getChildNodes()

   if ( arrayChildNodes[ 0 ].getName() == '#text' ) return

This code below does not work:

function getChildNode()
{
    var parentNode = arguments[ 0 ]
                             
    var arrayChildNodes = parentNode.getChildNodes()

   if ( arrayChildNodes == null ) return

The follwoing codes does not work, either.

function getChildNode()
{
    var parentNode = arguments[ 0 ]
                             
    var arrayChildNodes = parentNode.getChildNodes()

   if ( arrayChildNodes[ 0 ] == null ) return

If there are no child nodes, shouldn’t a null be returned?

4

f ( arrayChildNodes.length == 0 ) return

the childnodes are never null, only empty