code: public String getSQL92LikePattern() throws IllegalArgumentException {
  		if (escape.length() != 1) {
  			throw new IllegalArgumentException("Like Pattern --> escape char should be of length exactly 1");
  		}
  		if (wildcardSingle.length() != 1) {
  			throw new IllegalArgumentException("Like Pattern --> wildcardSingle char should be of length exactly 1");
  		}
  		if (wildcardMulti.length() != 1) {
  			throw new IllegalArgumentException("Like Pattern --> wildcardMulti char should be of length exactly 1");
  		}
  		return LikeFilterImpl.convertToSQL92(escape.charAt(0), wildcardMulti.charAt(0), wildcardSingle.charAt(0),
  				isMatchingCase(), pattern);
  	}
docs: See convertToSQL92.
  
  @return SQL like sub-expression
  @throws IllegalArgumentException oops