Creating nested xml in groovy

Question

I have an issue where I'm trying to dynamically create nested xml nodes in groovy. When I say dynamic, I mean using a StringTokenizer, so passing in a string "a.b", would give be a node like this:

<a>
  <b></b>
</a>

I already have the following code that can create a node with values and attributes (using a MarkupBuilder and StringWriter)

"${node.node_name}"(node.attributes, node.value);

If I were to replace this with

a{b()}

That would give be a nested node, but I need to create the node dynamically. I'm guessing that I'd use a StringTokenizer and do something like this

while(tokenizer.hasMoreElements()) {
    final String nodeName = tokenizer.nextToken();
     if(tokenizer.hasMoreElements()) {
         // create child node
     } else {
         // add value and attribute to final nested node
         "${nodeName}"(node.attributes, node.value);
     }
}

Thanks for any help.

tim_yates · Accepted Answer · 2015-08-10 11:46:20Z

1

You could do this with inject to build up a chain of Closures which when run generates the xml:

import groovy.xml.MarkupBuilder

def property = 'a.b.c.d.e.f'
def leafProperties = [id:10, something:'else']

def writer = new StringWriter()
new MarkupBuilder(writer).with { xml ->
    property.split(/\./).reverse().inject(null) { c, p ->
        c ? { x -> xml."$p"(c) } : { x -> xml."$p"(leafProperties) }
    }()
}

println writer.toString()

edited Aug 10, 2015 at 11:46

answered Aug 10, 2015 at 11:17

tim_yates

172k29 gold badges359 silver badges354 bronze badges

Sign up to request clarification or add additional context in comments.

5 Comments

wybourn Over a year ago

Thanks, that does successfully create a nested node. How would I go about adding attributes/values to the final node (most nested)? I tried adding them to a few places but kept getting errors.

tim_yates Over a year ago

Updated answer...is that what you mean?

wybourn Over a year ago

I tried that and I got a MissingMethodException:No signature of method: java.lang.String.call() is applicable for argument types: (java.util.LinkedHashMap, java.lang.String) values: [[:], 012] . Here I've passed in an empty map for the attributes, and a string for the value.

wybourn Over a year ago

Apoligies, I misread the update. That's all working now, thank you very much.

tim_yates Over a year ago

No worries! Have fun!

Collectives™ on Stack Overflow

Creating nested xml in groovy

1 Answer 1

5 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

5 Comments

Your Answer

Sign up or log in

Post as a guest

Related