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POGroovy: how to insert a node at the beginning of a list of elements in XML read in using XMLSlurper()
 

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  1. POGroovy: how to insert a node at the beginning of a list of elements in XML read in using XMLSlurper()
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    <p>I'm probably missing something obvious, as I'm a noob with Groovy, but I've searched but haven't found quite what I'm looking for. I have a test class where I'm reading in some XML; I want to insert an element <strong>at the beginning</strong> of a series of elements. I have figured out how to <em>replace</em> the first element, and I've figured out how to <em>append</em> a node to the end of the list, but I can't seem to grok how to insert an element at the beginning of the list (or ideally, any arbitrary position).</p> <p>For example:</p> <pre><code>@Test void foo() { def xml = """&lt;container&gt; &lt;listofthings&gt; &lt;thing id="100" name="foo"/&gt; &lt;/listofthings&gt; &lt;/container&gt;""" def root = new XmlSlurper().parseText(xml) root.listofthings.thing[0].replaceNode ( { thing(id:101, name:'bar') }) root.listofthings.appendNode ( { thing(id:102, name:'baz') }) def outputBuilder = new groovy.xml.StreamingMarkupBuilder() String result = outputBuilder.bind { mkp.yield root } print result } </code></pre> <p>which yields:</p> <pre><code>&lt;container&gt; &lt;listofthings&gt; &lt;thing id='101' name='bar'/&gt; &lt;thing id='102' name='baz'/&gt; &lt;/listofthings&gt; &lt;/container&gt; </code></pre> <p>What I really want is to insert a node at the <strong>beginning</strong> of <em>listofthings</em>, i.e. something to replace the call to <em>replaceNode</em> that would instead insert the thing with id 101 before the thing with id 100. I would also be nice if say, I had a longer list, to insert a node after the n'th element.</p> <p>(Incidentally, is there a way to get the output in a more readable format? The output from StreamingMarkupBuilder all ends up as a single line of text; I reformatted it for clarity above)</p> <p>Edit: I'm using 1.7.5, that's bundled with Eclipse, if it matters.</p>
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