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 /*
  * Copyright 2013-2015 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
  *
  *  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.services.s3.transfer;

The status of a pause operation initiated on a Upload/ Download.
public enum PauseStatus {

    
transfer successfully paused (and therefore the return information can be used to resume the transfer later on)
    SUCCESS,

    
pause is not yet applicable since transfer has not started; so no action taken
    NOT_STARTED,

    
pause is not yet applicable since transfer has not started AND cancel was requested; so we cancel it
    CANCELLED_BEFORE_START,

    
pause is not possible while transfer is already in progress; so no action taken
    NO_EFFECT,

    
pause is not possible while transfer is already in progress AND cancel was requested; so we cancel it
    CANCELLED, ;

    
Returns true if the transfer is paused else false.
    public boolean isPaused() {
        return this == ;
    }

    
Returns true if the transfer is cancelled else false.
    public boolean isCancelled() {
        return this ==  || this == ;
    }

    
Returns true if the transfer is not started or the pause operation has no effect on the transfer.
    public boolean unchanged() {
        return this ==  || this == ;
    }
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