Sort XML attribute value alphabetically

SortXMLAttrAlpha.groovy

def xmlStr = '''
<solutions>
    <solution solutionName="XYZ.1052">
        <settings/>
    </solution>
    <solution solutionName="XYZ.1012">
        <settings/>
    </solution>
    <solution solutionName="XYZ.1053">
        <settings/>
    </solution>
</solutions>
'''



def xml = new XmlParser().parseText(xmlStr)

xml.solution['@solutionName'].collect{it}.sort().eachWithIndex{ name, index ->
    xml.solution[index].@solutionName = name
}

new XmlNodePrinter(new PrintWriter(new FileWriter('sorted.xml'))).print(xml)