* Copyright 2010-2015 Amazon.com, Inc. or its affiliates. All Rights Reserved.
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
* This method is called for every file that is uploaded by <code>TransferManager</code>
* and gives an opportunity to specify the metadata for the file.
* @param file
* The file being uploaded.
* @param metadata
* The default metadata for the file. You can modify this object to specify
* your own metadata.