@Override
    public int hashCode() {
        final int prime = 31;
        int hashCode = 1;

        hashCode = prime * hashCode + ((getCsv() == null) ? 0 : getCsv().hashCode());
        hashCode = prime * hashCode + ((getJson() == null) ? 0 : getJson().hashCode());
        hashCode = prime * hashCode + ((getCompressionType() == null) ? 0 : getCompressionType().hashCode());
        return hashCode;
    }
Specifies object's compression format. Valid values: NONE, GZIP. Default Value: NONE.
aws-java-sdk-s3/src/main/java/com/amazonaws/services/s3/model/InputSerialization.java