How to use hash in talend

[dwhdeveloper]

I am inserting data in a table from another.
I would like to add a column hash which has hash of all the columns of each row being inserted. 
How would I do that in Talend? 
 

[Anonymous]

Can you please explain better what do you want to produce?

[TRF]

Hi,
1st, define a routine for conversion (here, mine is called GetHashCode and convert to MD5):

package routines;
import java.security.*;
public class GetHashCode {
	public static String getMD5(String strCode) {
		java.security.MessageDigest msg;
		String digest1 = "";
		try {
			msg = java.security.MessageDigest.getInstance("MD5");
			msg.update(strCode.getBytes(), 0, strCode.length());
			digest1 = new java.math.BigInteger(1, msg.digest()).toString(32);
		}
		catch (NoSuchAlgorithmException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return digest1.toUpperCase();
	}
}

In tMap, add the desired field to your schema, then call the routine passing the input fields concateneted, and push the result to the new field (here is an example):

GetHashCode.getMD5(row1.col1 + row1.col2 + row1.col3)

Hope this helps,
TRF

[offcourse2]

Hi

I used this code and it worked perfectly. Is it possible to fix the number of character of the hash?

Currently it ranges between 23 and 26 characters, and I'd like to fix that, ensuring I have no duplicates.

Thanks