How to parse XML comments in Groovy?

Is there any way to parse XML comments in Groovy?

Both XMLParser and XMLSluprer don't seem to support comments nodes.

Suppose following file (example.html):

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>title</title>
<body>
<table cellpadding="1" cellspacing="1" border="1">
<thead>
<tr><td rowspan="1" colspan="3">title</td></tr>
</thead><tbody>
<!--I cannot be seen-->
<tr>
	<td>x</td>
	<td>x</td>
	<td>x</td>
</tr>
</tbody></table>
</body>
</html>

Here is my code:

def parser = new XmlSlurper(false, false)
parser.setFeature("http://apache.org/xml/features/disallow-doctype-decl", false)
parser.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false)

def response = parser.parse('example.html')

And when I use

println XmlUtil.serialize(response)

to output the file, no comment can be seen.

Solution

as soon as you have html - it's possible to use jsoup to parse

@Grab(group='org.jsoup', module='jsoup', version='1.11.3')
import org.jsoup.Jsoup
import org.jsoup.nodes.Document

def html = '''<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>title</title>
<body>
<table cellpadding="1" cellspacing="1" border="1">
<thead>
<tr><td rowspan="1" colspan="3">title</td></tr>
</thead><tbody>
<!--I cannot be seen-->
<tr>
    <td>x</td>
    <td>x</td>
    <td>x</td>
</tr>
</tbody></table>
</body>
</html>'''

Document doc = Jsoup.parse(html)
println doc.select('html body table tbody').first()?.childNodes()?.find{it.nodeName()=='#comment'}?.getData()