[rules-users] How to use the value of a function in both the LHS and RHS side of the rule ?

Hi, I want to parse a file and match the file for several regular expressions. Based on what I match, I write more rules so that based on all the rules, I can set my results. Brute force method : Parse the entire file and add all the lines into the working memory. Write rules that check each line for some regular expression. This works great. I want to optimize the above, as we are checking each line, if we got we are looking for, then I want to get out. So, I wrote a function inside the rule file like the below function String getLine(BufferedReader fileReader) { String line; try { if ((line = fileReader.readLine()) != null) { return line.toLowerCase(); } else { System.out.println("This is an empty line."); } } catch (Exception ex) { } return line; } Now, I need to write the rules that will use this. rule "Generate New Line" when eval (getLine(fileReader) != null) then System.out.println("Generate new line"); //assert(getLine(fileReader)); // need to somehow assert the line specified in the eval condition end Also, I am confused, how to specify file end. rule "File End" when eval (getLine(fileReader) == null) then System.out.println("Reached end of file"); // I am assuming this is not needed since if all rules are executed, then it will get out of fireRules() anyways ? end Any help is appreciated. TIA, Krishnan (newbie) - Sivaramakrishna Iyer Krishnan (Anand) Never assume the obvious is true. - William Safire