Mapping problem in idoc

Question

Hi
  I had a source segment E1EDP20 (0---99 occurences), i need to pass a constant value to target field poitem.
  the requirement is
on every occurence of  E1EDP20, the constant value should be incremented by 1 and that constant should be passed to target field poitem.
Ex- on first occurence of E1EDP20 the constant value should be 1.
      on second occurence of E1EDP20 the constant value should be 2.
     on third occurence of E1EDP20 the constant value should be 3.
like this as long as on  E1EDP20 occurs the constant value should be incremented by 1.
the constant should be passed to targetfield poitem.
pls suggest what is the logic should i write for the above requirement.
regards
raghu

Answer 1

If your requirement is to make the string length to 4 padding with 0's before, then try the below udf.
public static String Pad(String input, String padChar, int iLength, String sPadDir) {
          StringBuffer strBuf = new StringBuffer(input);
          String sTemp = "";
          int iInputLen = input.length();
          if (iInputLen >= iLength)
               return input;
          if (sPadDir.length() != 0) {
               if (sPadDir.equalsIgnoreCase("right")) {
                    for (int j = 0; j < iLength - iInputLen; j++) {
                         sTemp = strBuf.append(padChar).toString();
               } else if (sPadDir.equalsIgnoreCase("left")) {
                    for (int h = 0; h < iLength - iInputLen; h++) {
                         sTemp = strBuf.insert(h, padChar).toString();
               } else {
                    sTemp = "Pad Direction Incorrect";
          } else {
               sTemp = "Pad Direction Does not exist";
          return sTemp;
constant value->UDF->Target
If you use the above UDF, you would get the output as 0xxx if your input is xxx,00xx for xx input,000x for x input.
Regards,
Swetha.