public Integer getExpirationInDays() {
        return this.expirationInDays;
    }
<p>
This argument specifies how long the S3 Glacier or S3 Glacier Deep Archive object remains available in Amazon S3.
S3 Initiate Restore Object jobs that target S3 Glacier and S3 Glacier Deep Archive objects require
<code>ExpirationInDays</code> set to 1 or greater.
</p>
<p>
Conversely, do <i>not</i> set <code>ExpirationInDays</code> when creating S3 Initiate Restore Object jobs that
target S3 Intelligent-Tiering Archive Access and Deep Archive Access tier objects. Objects in S3
Intelligent-Tiering archive access tiers are not subject to restore expiry, so specifying
<code>ExpirationInDays</code> results in restore request failure.
</p>
<p>
S3 Batch Operations jobs can operate either on S3 Glacier and S3 Glacier Deep Archive storage class objects or on
S3 Intelligent-Tiering Archive Access and Deep Archive Access storage tier objects, but not both types in the
same job. If you need to restore objects of both types you <i>must</i> create separate Batch Operations jobs.
</p>

@return This argument specifies how long the S3 Glacier or S3 Glacier Deep Archive object remains available in
        Amazon S3. S3 Initiate Restore Object jobs that target S3 Glacier and S3 Glacier Deep Archive objects
        require <code>ExpirationInDays</code> set to 1 or greater.</p>
        <p>
        Conversely, do <i>not</i> set <code>ExpirationInDays</code> when creating S3 Initiate Restore Object jobs
        that target S3 Intelligent-Tiering Archive Access and Deep Archive Access tier objects. Objects in S3
        Intelligent-Tiering archive access tiers are not subject to restore expiry, so specifying
        <code>ExpirationInDays</code> results in restore request failure.
        </p>
        <p>
        S3 Batch Operations jobs can operate either on S3 Glacier and S3 Glacier Deep Archive storage class
        objects or on S3 Intelligent-Tiering Archive Access and Deep Archive Access storage tier objects, but not
        both types in the same job. If you need to restore objects of both types you <i>must</i> create separate
        Batch Operations jobs.
aws-java-sdk-s3control/src/main/java/com/amazonaws/services/s3control/model/S3InitiateRestoreObjectOperation.java