Sort elements of arbitrary XML document recursively

Sort elements of arbitrary XML document recursively

I'm trying to sort and canonicalize some XML documents. The desired end
result is that:
every element's children are in alphabetical order
every elements attributes are in alphabetical order
comments are removed
all elements are properly spaced (i.e. "pretty print").
I have achieved all of these goals except #1.
I have been using this answer as my template. Here is what I have so far:
import javax.xml.transform.stream.StreamResult
import javax.xml.transform.stream.StreamSource
import javax.xml.transform.TransformerFactory
import org.apache.xml.security.c14n.Canonicalizer
// Initialize the security library
org.apache.xml.security.Init.init()
// Create some variables
// Get arguments
// Make sure required arguments have been provided
if(!error) {
// Create some variables
def ext = fileInName.tokenize('.').last()
fileOutName = fileOutName ?: "${fileInName.lastIndexOf('.').with {it
!= -1 ? fileInName[0..<it] :
fileInName}}_CANONICALIZED_AND_SORTED.${ext}"
def fileIn = new File(fileInName)
def fileOut = new File(fileOutName)
def xsltFile = new File(xsltName)
def temp1 = new File("./temp1")
def temp2 = new File("./temp2")
def os
def is
// Sort the XML attributes, remove comments, and remove extra whitespace
println "Canonicalizing..."
Canonicalizer c =
Canonicalizer.getInstance(Canonicalizer.ALGO_ID_C14N_OMIT_COMMENTS)
os = temp1.newOutputStream()
c.setWriter(os)
c.canonicalize(fileIn.getBytes())
os.close()
// Sort the XML elements
println "Sorting..."
def factory = TransformerFactory.newInstance()
is = xsltFile.newInputStream()
def transformer = factory.newTransformer(new StreamSource(is))
is.close()
is = temp1.newInputStream()
os = temp2.newOutputStream()
transformer.transform(new StreamSource(is), new StreamResult(os))
is.close()
os.close()
// Write the XML output in "pretty print"
println "Beautifying..."
def parser = new XmlParser()
def printer = new XmlNodePrinter(new
IndentPrinter(fileOut.newPrintWriter(), " ", true))
printer.print parser.parseText(temp2.getText())
// Cleanup
temp1.delete()
temp2.delete()
println "Done!"
}
Full script is here.
XSLT:
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="node()|@*">
<xsl:copy>
<xsl:apply-templates select="node()|@*"/>
</xsl:copy>
</xsl:template>
<xsl:template match="foo">
<foo>
<xsl:apply-templates>
<xsl:sort select="name()"/>
</xsl:apply-templates>
</foo>
</xsl:template>
</xsl:stylesheet>
Sample Input XML:
<foo b="b" a="a" c="c">
<qwer>
<zxcv c="c" b="b"/>
<vcxz c="c" b="b"/>
</qwer>
<baz e="e" d="d"/>
<bar>
<fdsa g="g" f="f"/>
<asdf g="g" f="f"/>
</bar>
</foo>
Desired Output XML:
<foo a="a" b="b" c="c">
<bar>
<asdf f="f" g="g"/>
<fdsa f="f" g="g"/>
</bar>
<baz d="d" e="e"/>
<qwer>
<vcxz b="b" c="c"/>
<zxcv b="b" c="c"/>
</qwer>
</foo>
How can I make the transform apply to all elements so all of an element's
children will be in alphabetical order?