to mba fai

crc32sampul.java

private void validateCheckSum(DocumentUploadRequest documentUploadRequest) {
        long checksumValue = Utilities.checksum(documentUploadRequest.getDocument().getBytes());
        long checksumReq = Long.parseLong(documentUploadRequest.getDocumentChecksum());
        Logger.info("Checksum Document request " + checksumReq);
        Logger.info("Checksum Document calculate " + checksumValue);
        if (checksumReq != checksumValue) {
            Logger.info("Checksum Document calculate " + checksumValue);
            throw new ConstraintValidationException("Checksum vallidation failed");
        }
}
    
    
import java.util.zip.CRC32;
import java.util.zip.Checksum;

public static long checksum(byte[] file) {
        Checksum checksumHash = new CRC32();
        checksumHash.update(file, 0, file.length);
        return checksumHash.getValue();
    }