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Update JavaDoc in MtpDatabase.

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BUG=25162822

Change-Id: Icfd9391daa01846f5ec12d5ea7448ebc7444a05c
This commit is contained in:
Daichi Hirono
2015-10-28 16:43:32 +09:00
parent 85a808bf96
commit 59686f6c35
1 changed files with 9 additions and 2 deletions
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11
packages/MtpDocumentsProvider/src/com/android/mtp/MtpDatabase.java
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@@ -20,8 +20,15 @@ import java.nio.charset.StandardCharsets;
* Database for MTP objects.
* The object handle which is identifier for object in MTP protocol is not stable over sessions.
* When we resume the process, we need to remap our document ID with MTP's object handle.
* The database object remembers the map of document ID and fullpath, and helps to remap object
* handle and document ID by comparing fullpath.
*
* If the remote MTP device is backed by typical file system, the file name
* is unique among files in a directory. However, MTP protocol itself does
* not guarantee the uniqueness of name so we cannot use fullpath as ID.
*
* Instead of fullpath, we use artificial ID generated by MtpDatabase itself. The database object
* remembers the map of document ID and object handle, and remaps new object handle with document ID
* by comparing the directory structure and object name.
*
* TODO: Remove @VisibleForTesting annotation when we start to use this class.
*/
@VisibleForTesting