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https://issues.apache.org/jira/browse/GROOVY-8206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17839681#comment-17839681
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Simon Ceder commented on GROOVY-8206:
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[~paulk] I have a use case were this matters. I currently have to wrap the
cloned node in a placeholder in a real world scenario.
My use case is that I receive a big XML file which needs to be preserved for
history. I also need to split this big XML file into smaller files. To do this
I am using XmlParser to get and clone the nodes that needs to be split into new
files. All good so far. Now I also need to edit the new files by replacing some
of the child nodes. This can't be done without a parent assigned to the child
node otherwise I receive this error:
{code:java}
java.lang.UnsupportedOperationException: Replacing the root node is not
supported {code}
As such I first have to wrap the cloned nodes in a placeholder node before I
can edit them and save them to a new file. I really don't see the reason for
the cloned nodes children having no parent set?
> Groovy clone node with new parent reference in child nodes
> ----------------------------------------------------------
>
> Key: GROOVY-8206
> URL: https://issues.apache.org/jira/browse/GROOVY-8206
> Project: Groovy
> Issue Type: Improvement
> Components: groovy-jdk
> Reporter: Manish Yadav
> Priority: Major
>
> As of now groovy supports clone node feature without storing parent
> reference(i.e. the new clone nodes) in child nodes.
> We can add following custom methods in some util class to make cloning more
> advanced :
> 1:
> {code}
> private Node cloneNode(Node node, Node parentNode) {
> Object newValue = node.value()
> Node clonedNode = new Node(null, node.name(), new
> HashMap(node.attributes()), newValue)
> if (newValue instanceof NodeList) {
> NodeList nodes = (NodeList) newValue
> newValue = cloneNodeList(nodes, clonedNode)
> }
> clonedNode.setValue(newValue)
> clonedNode.setParent(parentNode)
> return clonedNode
> }
> {code}
> 2:
> {code}
> private NodeList cloneNodeList(NodeList nodeList, Node parentNode) {
> NodeList result = new NodeList(nodeList.size())
> for (int i = 0; i < nodeList.size(); i++) {
> Object next = nodeList.get(i)
> if (next instanceof Node) {
> result.add(cloneNode((Node) next, parentNode))
> } else {
> result.add(next)
> }
> }
> return result
> }
> {code}
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