How to do Schema complaince using groovy scripting?

import javax.xml.XMLConstants
import javax.xml.transform.stream.StreamSource
import javax.xml.validation.SchemaFactory

//Load the XSD from a file
def xsd = new File('/path/to/schema.xsd').text

//Get the XML from the response
def xmlHolder = new com.eviware.soapui.support.XmlHolder( messageExchange.responseContentAsXml )
def xml = xmlHolder['//result']

def factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI)
def schema = factory.newSchema(new StreamSource(new StringReader(xsd)))
def validator = schema.newValidator()

try {
 validator.validate(new StreamSource(new StringReader(xml)))
} catch( e ) {
 assert false
}