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From "Thomas Mueller (JIRA)" <j...@apache.org>
Subject [jira] [Created] (OAK-264) MicroKernel.diff for depth limited, unspecified changes
Date Tue, 21 Aug 2012 09:45:37 GMT
Thomas Mueller created OAK-264:

             Summary: MicroKernel.diff for depth limited, unspecified changes
                 Key: OAK-264
                 URL: https://issues.apache.org/jira/browse/OAK-264
             Project: Jackrabbit Oak
          Issue Type: Bug
          Components: mk
            Reporter: Thomas Mueller

Currently the MicroKernel API specifies for the method "diff", if the depth parameter is used,
that unspecified changes below a certain path can be returned as:

  ^ "/some/path"

I would prefer the slightly more verbose:

  ^ "/some/path": {}

Reason: It is similar to how getNode() returns node names if the depth limited: "some":{"path":{}},
and it makes parsing unambiguous: there is always a ':' after the path, whether a property
was changed or a node was changed. Without the colon, the parser needs to look ahead to decide
whether a node was changed or a property was changed (the token after the path could be the
start of the next operation). And we could never ever support ':' as an operation because
that would make parsing ambiguous.

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