CheckSum for RAW datatype.

[Ravindra Nandyala]

Hi All,

Can somebody please give me an idea on how to calculate checksum on RAW datatypes. I have a prog that calculats checksum on BLOB and CLOB datatypes but I am trying to figure out what to do with RAW Type. here is peice of code for your reference.

int columnCount = rs.getMetaData().getColumnCount();
			Object obj = new Object();
			logMessage("Number of Columns Retireved for Table : " + tname  + "are : " + columnCount  ,LogWriter.INFO);
			 while (rs.next())
			 {	 for(int col=1; col<= columnCount; col++ )
				 {
					 obj = rs.getObject(col);

					 	if((obj == null))
					 	{
					 		continue;
					 	}
					 	if(obj instanceof Blob)
					 	{
					 		    Blob b = (Blob)obj;
					 	        long blobSize = b.length();
					 	        for (int block = 0; block < blobSize/blockSize; block++) {
					 	         bytes = b.getBytes(block*blockSize+1,blockSize);
					 	         digest.update(bytes); }
					 	        bytes = b.getBytes((blobSize/blockSize)*blockSize+1,(int)blobSize%blockSize);
						        digest.update(bytes);
					 	}
					 	if(obj instanceof Clob)
					 	{
					 		Clob c = (Clob)obj;
					        long clobSize = c.length();
					        for (int block = 0; block < clobSize/blockSize; block++) {
					          bytes = c.getSubString(block*blockSize+1,blockSize).getBytes();
					          digest.update(bytes);
					        }
					        bytes = c.getSubString((clobSize/blockSize)*blockSize+1,(int)(clobSize%blockSize)).getBytes();
					        digest.update(bytes);
					 	}

					 	
					 	else
					 	{
							bytes=obj.toString().getBytes();
					 		digest.update(bytes);
					 	}
					 }
			 }
			  bytes = digest.digest();

			  	StringBuffer hexString = new StringBuffer();
				for (int i= 0; i < bytes.length; i++) {
					hexString.append(Integer.toHexString(0xFF & bytes[i]));
				}
				System.out.println(tname + ": " + hexString.toString());
    

I would be thankfull if you can provide me some ideas.