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https://issues.apache.org/jira/browse/CONFIGURATION-287?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Oliver Heger updated CONFIGURATION-287:
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Fix Version/s: 1.5
Assignee: Oliver Heger
> XMLConfiguration.addNodes() problem using other configuration Nodes
> -------------------------------------------------------------------
>
> Key: CONFIGURATION-287
> URL: https://issues.apache.org/jira/browse/CONFIGURATION-287
> Project: Commons Configuration
> Issue Type: Bug
> Affects Versions: 1.4
> Reporter: Ruben Silva
> Assignee: Oliver Heger
> Fix For: 1.5
>
>
> Trying to use the method XMLConfiguration.addNodes() to add a tree of
> configuration properties to a node in other tree fails.
> Example:
> public static void main(String ...args){
> try{
> configDestination = new XMLConfiguration("output.xml");
> configSource = new XMLConfiguration("input.xml");
> }
> catch(ConfigurationException cex){
> System.out.println("File not found");
> }
> Collection collection = new ArrayList();
> collection = configSource.getRoot().getChildren();
> configDestination.addNodes("newNodes", collection);
>
> try {
> configDestination.save();
> } catch (ConfigurationException e) {
> System.out.println("Error saving");
> }
> }
> The XML files:
> input.xml
> <rootNode>
> <newNodeChild>
> <newNodeChildChild>child value</newNodeChildChild>
> <newNodeChildChild>child value 2</newNodeChildChild>
> <newNodeChildChild>child value 3</newNodeChildChild>
> </newNodeChild>
> </rootNode>
> output.xml
> <testRootNode>
> <test>TEST</test>
> </testRootNode>
> output.xml after running the code:
> <testRootNode>
> <test>TEST</test>
> <newNodes/>
> </testRootNode>
> Expected output.xml:
> <testRootNode>
> <test>TEST</test>
> <newNodes>
> <newNodeChild>
> <newNodeChildChild>child value</newNodeChildChild>
> <newNodeChildChild>child value 2</newNodeChildChild>
> <newNodeChildChild>child value 3</newNodeChildChild>
> </newNodeChild>
> <newNodes/>
> </testRootNode>
> Apparently "the copied nodes still contain a reference to their old
> configuration (because you directly fetched them from the root node of the
> source configuration). Because of this reference they are not detected as new
> nodes when the destination configuration is saved, and hence not written to
> disk.
> I think addNodes() should reset this reference, so that the added nodes can
> be detected as new nodes. (But then you have to be aware that you break the
> source configuration because a node can only be contained in exactly one
> configuration.) "
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