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From jburwell <>
Subject [GitHub] cloudstack pull request: Taking fast and efficient volume snapshot...
Date Mon, 11 Apr 2016 15:53:50 GMT
Github user jburwell commented on the pull request:
    @mike-tutkowski ``null`` values in a ``Map`` are extremely ugly.  It seems like filtering
them at the time a ``Map`` is created would make things simpler overall (i.e. no need to check
that every value retrieved is not ``null``.  Using Guava, you can filter a map cleanly as
        ImmutableMap<String, Object> copy = ImmutableMap.of(Maps.filterValues(map, new
Predicate<Object>() {
           apply(Object input) {
               return input != null;
    This type of operation seems like it would be useful across CloudStack.  Therefore, I
would further suggest creating a utility method in utils (e.g. ``copyMapToImmutableMap``)
to wrap this operation and properly unit test it.

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