[Solved] Change an empty node value with DocumentBuilder

[Mr.Dandy]

Come back with a new issue

My XML is

Code: Select all

<?xml version="1.0" encoding="UTF-8"?>
<item>
 <state>true</state>
 <name/>
 <location>A</location>
 <version>13</version>
 <features>None</features>
</item>

Change an existing value works but not if this is empty

Code: Select all

Sub Main
	sURL = ConvertToUrl("c:\Temp\test.xml")
	XmlChangeValue(sURL, "version", 14) 'works
	XmlChangeValue(sURL, "name", "Foo") 'failed
	
End Sub

Function XmlChangeValue(sURL, sNode, sValue)
	oDocBuilder = createUnoService("com.sun.star.xml.dom.DocumentBuilder")
	oDom = oDocBuilder.parseURI(sURL)
	oDom.normalize()
	
	oXmlNode = oDom.getElementsByTagName(sNode)
	nNode = oXmlNode.getLength()
	for i = 0 To nNode - 1
		oChildNode = oXmlNode.item(i).getChildNodes()
		if oChildNode.Length > 0 then
			oElem = oChildNode.item(0)
			oElem.normalize()
			oElem.deleteData(0, Len(oElem.getData() )
			oElem.setData(sValue)
		else
			oElem = oXmlNode.item(0)
			oElem.normalize()
			'mri oElem
			oElem.setNodeValue(sValue)
		endif
	next i

	oSFA = createUNOService ("com.sun.star.ucb.SimpleFileAccess") 
	'oOutStream = oSFA.openFileWrite(sURL) 
	oOutStream = oSFA.openFileWrite("c:\Temp\test2.xml") 'keep origin
	oDom.setOutputStream(oOutStream) 
	oDom.start
	oOutStream.closeOutput()

End function

setNodeValue occurs an exception
Did you have an advice or (better) a fix?
Thanks

[JeJe]

https://www.openoffice.org/api/docs/com ... nType.html

[Mr.Dandy]

I don't understand what I do with this page
The c.s.s.xml.dom.DOMException returns no message:

capture.png (116.06 KiB) Viewed 2328 times

[JeJe]

Using MRI I see its an element node - they don't have a node value, hence an exception. See the table on this page pointed to by the setNodeValue documentation:

https://www.openoffice.org/api/docs/com ... tNodeValue

[Mr.Dandy]

However I see a NodeValue property

capture.gif (96.11 KiB) Viewed 2274 times

[JeJe]

Yes, and the documentation says its null for an element node and that setNodeValue will return the error you get. It is all explained, and as expected.

[Bidouille]

Rather than beating about the bush

Instead of

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oElem.setNodeValue(sValue)

Replace by

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oElem.appendChild(oDom.createTextNode(sValue))

[Mr.Dandy]

Rather than beating about the bush

Indeed

Thanks for the code: solved!