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2013-03-04T14:04:50.070
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You can build your XML with <code>groovy.xml.StreamingMarkupBuilder</code> by walking recursively through the node map. The map you create in your second step loses all the attributes defined in <code>trees</code> though. To keep them you will have to change that part first: <pre><code>// An empty map. Default value for nonexistent elements is an empty map. def struc = {[:].withDefault{owner.call()}}() trees.each { key, val -> // iterate through the tokenized path and create missing elements along the way def substruc = struc val.path.tokenize('/').each { // if substruc.nodes does not exist it will be created as an empty map // if substruc.nodes[it] does not exist it will be created as an empty map substruc = substruc.nodes[it] } // assign the attributes to the map in .attr val.each{ attrKey, attrVal -> substruc.attr[attrKey] = attrVal } } </code></pre> This will result in a map like this: <pre><code>[nodes: [ROOT: [nodes: [folder1: [attr: [id:1, ...], nodes: [...]]]]] </code></pre> The closure that will be used in the <code>StreamingMarkupBuilder</code> will use another closure to iterate through the nodes in <code>struc</code> recursively while assigning <code>.attr</code> as the node's attributes and <code>.nodes</code> as the node's child nodes. <pre><code>// we will use this builder to create our XML def builder = new groovy.xml.StreamingMarkupBuilder() builder.encoding = "UTF-8" // closure for our xml structure def xml = { // closure to be recursively called for each element in the nodes maps def xmlEach xmlEach = { key, val -> out << { "${key}"(val.attr) { val.nodes.each(xmlEach) } } } struc.nodes.each(xmlEachClosure) } println builder.bind(xml) </code></pre> As output you get XML simliar to the following: <pre><code><ROOT> <folder1 id='1' path='ROOT/folder1' name='folder1' isFolder='true'> <folder1.1 id='2' path='ROOT/folder1/folder1.1' name='folder1.1' isFolder='true'> <folder1.1.1 id='3' path='ROOT/folder1/folder1.1/folder1.1.1' name='folder1.1.1' isFolder='true'></folder1.1.1> </folder1.1> </folder1> ... </ROOT> </code></pre>
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