Support update-aware sub-configurations for the configurationsAt() method
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Key: CONFIGURATION-333
URL:
https://issues.apache.org/jira/browse/CONFIGURATION-333 Project: Commons Configuration
Issue Type: New Feature
Affects Versions: 1.5
Reporter: Oliver Heger
Assignee: Oliver Heger
Priority: Minor
Fix For: 2.0
The configurationAt() method of hierarchical configurations has a supportsUpdates parameter. If set to true, the sub-configuration returned is aware of updates of its parent configuration. The configurationsAt() method should support a similar mechanism, too.
Checking for updates of the parent configuration requires the sub-configuration to be constructed with a unique key. So far it was not possible to determine such a key in the configurationsAt() method because the key passed to this method can select multiple nodes. So a way has to be implemented to determine a unique key for a given configuration node.
Having unique keys for all properties defined could be useful for other use cases, too. Maybe an extended version of the getKeys() method makes sense that returns unique keys? So each key returned by this method is guaranteed to map to exactly one node.
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