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Regular expressions can be a very powerful tool. You can use them to validate email addresses, check whether a value starts with a capital, etc, etc.

You can implement a UDF in SAP PI that does regex matching for you:


Pattern r = Pattern.compile(regex);

Matcher m = r.matcher(theText);

return “”+m.matches();

This UDF will return ‘true’ if a match is found between the text in the first argument and the regular expression in the second; otherwise it returns ‘false’.

An example

The input message contains a list of values, and in your mapping you want to pick the one that is an email address.

  • A regular expression to check whether a string is an email address is


For more information on the format of regular expressions, see

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