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  1. yangtools
  2. YANGTOOLS-711

XPath: provide an evaluator on top of DataTreeCandidate

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    • Resolution: Unresolved
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      In order to efficiently propagate state to applications, we want to expose a utility method, which can evaluate a chain of incoming DataTreeCandidates and accurately translate them to a chain of changes to an expression's return values.

      The way this should work is:

      XPath xpath = ...;
XPathDelta delta = XPathDeltaFactory.initial(xpath);

Collection<DataTreeCandiates> candidates = ...;
for (DataTreeCandidate c : candidates) {
  final Optional<XPathResult> res = delta.apply(c);
  if (res.isPresent()) {
    // Should not result in duplicates printed
    LOG.debug("XPath {} changed result to {}", xpath, res.get());
  }
}
// If no state has been applied, this will return Optional.empty()
Optional<XPathResult> currentResult = delta.current();
LOG.debug("Current XPath {} result is {}", xpath, currentResult);

       

            Unassigned Unassigned
            rovarga Robert Varga
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              Created:
              Updated: