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Bryan CutlerWes McKinney
2f2a0c139a9
Bryan Cutler authored and Wes McKinney committed 1926bdc9786
ARROW-1613: [Java] Alternative ArrowReader close to free resources but leave ReadChannel open

This adds an alternative `ArrowReader.close(boolean closeReadChannel)` that if called with `false` will close reader resources such as vectors/dictionaries but leave the `ReadChannel` open. The behavior of the default `ArrowReader.close()` is unchanged.

Author: Bryan Cutler <cutlerb@gmail.com>

Closes #1138 from BryanCutler/java-ArrowRead-not-close-input-ARROW-1613 and squashes the following commits:

028f2cd5 [Bryan Cutler] Added docs to ArrowReader
a9125dda [Bryan Cutler] revert test that manually closed ReadChannel
103a4192 [Bryan Cutler] changed to alternate close
b735135f [Bryan Cutler] Removed closing of ReadChannel from ArrowReader.close() and updated usage in tests to close things correctly