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https://issues.apache.org/jira/browse/CONFIGURATION-254?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Oliver Heger updated CONFIGURATION-254:
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Fix Version/s: 1.4
> Wrong creation of XMLFileConfigurationDelegate in XMLConfiguration.clone()
> --------------------------------------------------------------------------
>
> Key: CONFIGURATION-254
> URL: https://issues.apache.org/jira/browse/CONFIGURATION-254
> Project: Commons Configuration
> Issue Type: Bug
> Affects Versions: 1.3
> Environment: Java 1.4.2, Windows XP, Shale
> Reporter: Carsten Kaiser
> Assigned To: Oliver Heger
> Fix For: 1.4
>
>
> The clone() operation on a XMLConfiguration does not work correctly due to
> the following problem:
> private class XMLFileConfigurationDelegate extends FileConfigurationDelegate
> {
> public void load(InputStream in) throws ConfigurationException
> {
> XMLConfiguration.this.load(in);
> }
> }
> Obviously the delegate references the XMLConfiguration instance it is created
> in. Thus when calling
> public Object clone()
> {
> XMLConfiguration copy = (XMLConfiguration) super.clone();
> // clear document related properties
> copy.document = null;
> copy.setDelegate(createDelegate());
> // clear all references in the nodes, too
> copy.getRoot().visit(new NodeVisitor()
> {
> public void visitBeforeChildren(Node node, ConfigurationKey key)
> {
> node.setReference(null);
> }
> }, null);
>
> return copy;
> }
>
> the delegate still references the original XMLConfiguration, thus will save
> the content of the original one
> to file instead of the clone as expected! Changing the code like this
> copy.setDelegate(copy.createDelegate());
> solves the problem! Now the cloned XMLConfiguration with all its applied
> changes can be saved!
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