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Editorial Team
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Asked: 2026-06-18T14:28:25+00:00

I’m using XmlParser to read in an XML document that has some content like

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I’m using XmlParser to read in an XML document that has some content like this:

<instructions size='1'>
   <instruction key='manifest'>
      Bundle-SymbolicName: org.slf4j.api&#xA;Bundle-Version: 1.6.4.v20120130-2120
   </instruction>
</instruction>

Notice on the 3rd line there is entity for newline, &#xA;

The problem is when I use Groovy’s XmlNodePrinter to print out this document (in my case I’ve made changes elsewhere to the document), the node printer will print out the text node and use a real newline instead of %#xA;

<instructions size='1'>
   <instruction key='manifest'>
      Bundle-SymbolicName: org.slf4j.api
Bundle-Version: 1.6.4.v20120130-2120
   </instruction>
</instruction>

I have set the trimWhitespace=false for the XmlParser object and also set preserveWhitespace=true for XmlNodePrinter however this doesn’t change the aforementioned behavior.

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1 Answer

  1. Editorial Team

    You can wrap the text inside <![CDATA...]]>:

    <instructions size='1'>

   <instruction key='manifest'> 
   <![CDATA[       
       Bundle-SymbolicName: org.slf4j.api&amp;#xA;Bundle-Version: 1.6.4.v20120130-2120 
   ]]>
   </instruction>
</instructions>

    I’m testing it using the following the code:

    def out = new StringWriter() 
def xml = new XmlParser().parseText(new File("file.xml").text) 
def printer = new XmlNodePrinter(new PrintWriter(out)) 
printer.print(xml) 
println out.toString()

    The output is as expected:

    <instructions size="1">
   <instruction key="manifest">
      Bundle-SymbolicName: org.slf4j.api&amp;#xA;Bundle-Version: 1.6.4.v20120130-2120
   </instruction>
</instructions>

    RESPOND TO COMMENT:

    If you really have no choice, than you can extends XmlNodePrinter (this is a Java class) and create Groovy code such as:

    class MyXmlNodePrinter extends XmlNodePrinter {
   MyXmlNodePrinter(PrintWriter out) {
      super(out)
   }

   void printSimpleItem(Object value) {
      value = value.replaceAll("\n", "&#xA;")
      out.print(value)
   }
}

def out = new StringWriter() 
def xml = new XmlParser().parseText(new File("file.xml").text) 
def printer = new MyXmlNodePrinter(new PrintWriter(out)) 
printer.print(xml) 
println out.toString()

    The output of this code is:

    <instructions size="1">
   <instruction key="manifest">
      Bundle-SymbolicName: org.slf4j.api&#xA;Bundle-Version: 1.6.4.v20120130-2120
   </instruction>
</instructions>

    That MyXmlNodePrinter is trivial and doesn’t perform escaping, so you may need to copy (and change) private void printEscaped(String s, boolean isAttributeValue) from XmlNodePrinter. You can find the source code of XmlNodePrinter in https://github.com/groovy/groovy-core/blob/master/subprojects/groovy-xml/src/main/java/groovy/util/XmlNodePrinter.java

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