Get Field Names for a Structure Property

Ruby example to list the field names for a structure property.

Download Ruby Programming Example Scripts

# file: xmpGetArray.rb

require 'chilkat'

# Get XMP structure property field names
xmp = Chilkat::CkXmp.new()
success = xmp.UnlockComponent("Anything for 30-day trial")
if not success
	xmp.SaveLastError("errorLog.txt")
	exit
end

success = xmp.LoadAppFile("images/xmpExample.jpg")
if not success
	xmp.SaveLastError("errorLog.txt")
	exit
end

# How many embedded XMP documents in the image file?
numEmbedded = xmp.get_NumEmbedded()
if (numEmbedded == 0) 
	print "This JPG does not have embedded XMP metadata\n"
	exit
end

# Retrieve the 1st XMP document as a CkXml object.
# (There is usually only a single embedded XMP)
xml = xmp.GetEmbedded(0)

# CkStringArray is an object containing a collection of strings.
strArray = Chilkat::CkStringArray.new()

xmp.GetStructPropNames(xml,"Iptc4xmpCore:CreatorContactInfo",strArray)

n = strArray.get_Count();
    
for i in 0..n-1
	print strArray.strAt(i) + "\n"
end