Hi. Maybe you can check the TemplateTool in the experimental section :
http://svn.apache.org/repos/asf/jakarta/velocity/engine/trunk/experimental/templatetool/TemplateTool.java Claude Le mercredi 15 mars 2006 à 11:07 +0100, Holger Willebrandt a écrit : > Hello everybody, > > i would like to parse a velocity template and collect information about > all variables that are used within it. > Therefore, i use the Parser class in the following way: > > //here a reader for the template and a collector for the variables > //will be supplied > public static void findVariables(Reader reader, List collector) > throws ParseException { > VelocityCharStream cstream = new VelocityCharStream(reader, 0, 0); > Parser parser = new Parser(cstream); > findVariables(parser.process(), collector); //call method below > } > > //this method will recursively collect the variables and store them > //in the collector. > public static void findVariables(Node startNode, List collector) { > if (startNode.getClass().equals(ASTReference.class)) { > if (!collector.contains(startNode.literal())) { > collector.add(startNode.literal()); > } > } > for (int i = 0; i < startNode.jjtGetNumChildren(); i++) { > findVariables(startNode.jjtGetChild(i), collector); > } > } > > The code is working as long as the template does not contain a #foreach > statement. > Whenever i try to parse velocity code with a #foreach, i get the following > error: > > java.lang.NullPointerException > at > org.apache.velocity.runtime.parser.Parser.Directive(Parser.java:628) > at > org.apache.velocity.runtime.parser.Parser.Statement(Parser.java:319) > at org.apache.velocity.runtime.parser.Parser.process(Parser.java:258) > > Looking into velocity's source code, revealed that the Parser is missing a > RuntimeServices instance, resp. a template name. > > It would be nice to have a way of collecting all variables and validating the > synatx (a ParseException would indicate a syntax error) at once. > > Any kind of help or advice is welcome. > > Thanks, Holger > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
