[GROOVY-4285] XmlUtil.serialize doesn't seem to pick right method for GPathResult

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.7.3
• Fix Version/s: 1.7.4, 1.8-beta-1
• Component/s: groovy-jdk, XML Processing
• Assignee: Roshan Dawrani
• Reporter: Tim Yates
• Created: 01/Jul/10 02:33
• Updated: 22/Jul/10 17:32
• Resolved: 01/Jul/10 08:44

Description

The following gives an error:

import groovy.xml.XmlUtil
import groovy.xml.StreamingMarkupBuilder

def xmlStr = """<?xml version="1.0" encoding="UTF-8"?>
<stuff ver="1.0">
  <properties>
    <foo>bar</foo>
  </properties>
</stuff>"""

def gpr = new XmlSlurper().parseText( xmlStr )
println XmlUtil.serialize( gpr )

Gives the following error:

[Fatal Error] :1:1: Content is not allowed in prolog.
ERROR:  'Content is not allowed in prolog.'
<?xml version="1.0" encoding="UTF-8"?>

However if we change the println to:

println XmlUtil.serialize( (groovy.util.slurpersupport.GPathResult)gpr )

We get the correct output:

<?xml version="1.0" encoding="UTF-8"?>
<stuff ver="1.0">
  <properties>
    <foo>bar</foo>
  </properties>
</stuff>

Looks like Groovy is picking the wrong method somewhere... (though I can't see how)