private long generateExpirationDate(Date expirationDate) {

        long expirationInSeconds = expirationDate != null ? ((expirationDate
                .getTime() - clock.currentTimeMillis()) / 1000L)
                : PRESIGN_URL_MAX_EXPIRATION_SECONDS;

        if (expirationInSeconds > PRESIGN_URL_MAX_EXPIRATION_SECONDS) {
            throw new SdkClientException(
                    "Requests that are pre-signed by SigV4 algorithm are valid for at most 7 days. "
                            + "The expiration date set on the current request ["
                            + AWS4SignerUtils.formatTimestamp(expirationDate
                                    .getTime()) + "] has exceeded this limit.");
        }
        return expirationInSeconds;
    }
private long generateExpirationDate ( Date expirationDate ) { long expirationInSeconds = expirationDate != null ? ( ( expirationDate . getTime ( ) - clock . currentTimeMillis ( ) ) / 1000L ) : PRESIGN_URL_MAX_EXPIRATION_SECONDS ; if ( expirationInSeconds > PRESIGN_URL_MAX_EXPIRATION_SECONDS ) { throw new SdkClientException ( "Requests that are pre-signed by SigV4 algorithm are valid for at most 7 days. " + "The expiration date set on the current request [" + AWS4SignerUtils . formatTimestamp ( expirationDate . getTime ( ) ) + "] has exceeded this limit." ) ; } return expirationInSeconds ; }
Generates an expiration date for the presigned url. If user has specified
an expiration date, check if it is in the given limit.