/**
* Copyright 2015-2016 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
*
* http://aws.amazon.com/apache2.0
*
* 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.
*/
package com.amazonaws.mobileconnectors.s3.transferutility;
import com.amazonaws.services.s3.AmazonS3;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* A holder of S3 clients for {@link TransferUtility} to pass a reference of
* AmazonS3 to {@link TransferService}. Usually objects are passed to a service
* via intent in a parcelable form. A S3 client has too many elements to
* capture. Instead, this serves as an alternative approach, not ideal though.
*/
class S3ClientReference {
private static Map<String, AmazonS3> map = new ConcurrentHashMap<String, AmazonS3>();
public static void put(String key, AmazonS3 s3) {
map.put(key, s3);
}
/**
* Retrieves the AmazonS3 client on the given key.
*
* @param key key of the client
* @return an AmazonS3 instance, or null if the key doesn't exist
*/
public static AmazonS3 get(String key) {
return map.remove(key);
}
/**
* Clears all references.
*/
public static void clear() {
map.clear();
}
}