JCR2SPI does not provide actual size on RangeIterator.getSize()
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                 Key: JCR-1166
                 URL: https://issues.apache.org/jira/browse/JCR-1166
             Project: Jackrabbit
          Issue Type: Improvement
          Components: SPI
            Reporter: Julian Reschke


Currently, JCR2SPI always returns -1 on RangeIterator.getSize().

This return value is legal (meaning "unknown"), but may cause clients to simply 
iterate through the whole list when what they really want is simply the count.

Use case:

"The use case is to count the number of members of a NT_FOLDER without having 
to open up the NT_FOLDER and count all the members (and I assume load them into 
memory) "

To make this happen we probably need to move away from simple Iterators on the 
SPI level, and put quite some additional work into JCR2SPI.

Feedback appreciated.

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