XMPMeta does not have a constructor

[eyali_av]

Hi,

I've encountered the above error when doing

var xmp = new XMPMeta(xmpBlob);

The strange thing is, after I call other function with the exact code (which somehow works), calling the same code in the original function works.

I don't where to begin debug... it's not consistent.

Thanks!

[eyali_av · Accepted solution]

I think I found it!

I guess every time that some "services" or "dependencies" are going to be used (which one, I don't know ...) - you have to initialize it or declare it.

The code I used is:

if (ExternalObject.AdobeXMPScript === undefined) {
     ExternalObject.AdobeXMPScript = new ExternalObject('lib:AdobeXMPScript');
}

If only there was documentation... It'd be some much easier.

[petern55563219]

Thank you for sharing this information. Now it does not throw error about constructor but it does not read or set the value either.

here is what I am doing

if (ExternalObject.AdobeXMPScript === undefined) { 

     ExternalObject.AdobeXMPScript = new ExternalObject('lib:AdobeXMPScript'); 

} 

var docXmp = new XMPMeta(app.activeDocument.XMPString);

var nodeValue = docXmp.getProperty(XMPConst.NS_XMP, nodeName);

Do you see any obvious mistake?

[petern55563219]

found the gap : need to add .toString()

var nodeValue = xmp.getProperty(XMPConst.NS_XMP, nodeName).toString();