A Groovy script that can strip XML attributes from a XML file

stripAttributes.groovy

:: related to this Gist: https://gist.github.com/2790685
import java.io.File; 
import java.io.IOException; 
import java.io.StringWriter; 
import java.util.HashSet; 
import java.util.Set; 
 
import javax.xml.parsers.DocumentBuilderFactory; 
import javax.xml.parsers.ParserConfigurationException; 
import javax.xml.transform.OutputKeys; 
import javax.xml.transform.Transformer; 
import javax.xml.transform.TransformerConfigurationException; 
import javax.xml.transform.TransformerException; 
import javax.xml.transform.TransformerFactory; 
import javax.xml.transform.TransformerFactoryConfigurationError; 
import javax.xml.transform.dom.DOMSource; 
import javax.xml.transform.stream.StreamResult; 
import javax.xml.xpath.XPathConstants; 
import javax.xml.xpath.XPathExpression; 
import javax.xml.xpath.XPathExpressionException; 
import javax.xml.xpath.XPathFactory; 
 
import org.w3c.dom.*; 
import org.xml.sax.SAXException;


String attributeKey = "siteKey"
String xmlFileName = args[0]

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance()
factory.setNamespaceAware(true)
Document doc = null
NodeList nodes = null
Set<String> ids = null
File xmlFile = new File( xmlFileName )

try {
	doc = factory.newDocumentBuilder().parse( xmlFile )
	XPathExpression expr = XPathFactory.newInstance().newXPath().compile("//@" + attributeKey)
	ids = new HashSet<String>()
	nodes = (NodeList) expr.evaluate(doc, XPathConstants.NODESET)
} catch (SAXException e) {
	e.printStackTrace()
} catch (IOException e) {
	e.printStackTrace()
} catch (ParserConfigurationException e) {
	e.printStackTrace()
} catch (XPathExpressionException e) {
	e.printStackTrace()
} 

for (int i = 0; i < nodes.getLength(); i++) { 
   print(".") //progress indicator 
   println()
   Element el = ((Attr) nodes.item(i)).getOwnerElement(); 
   if ( el.hasAttribute( attributeKey ) ) el.removeAttribute( attributeKey ); 
} 

Transformer transformer
StreamResult result = null
try {
	transformer = TransformerFactory.newInstance().newTransformer()
	transformer.setOutputProperty( OutputKeys.INDENT, "yes" )
	result = new StreamResult(new StringWriter());
	DOMSource source = new DOMSource(doc)
	transformer.transform(source, result)
} catch (TransformerConfigurationException e) {
	e.printStackTrace()
} catch (TransformerFactoryConfigurationError e) {
	e.printStackTrace()
} catch (TransformerException e) {
	e.printStackTrace()
} 

String xmlString = result.getWriter().toString()
println(xmlString)

try {
  BufferedWriter out = new BufferedWriter(new FileWriter( xmlFileName ))
  out.write( xmlString )
  out.close()
} 
catch (IOException e) 
{ 
  System.out.println("Exception ")
}