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[FreeMarker-user] Detect invalid directives

John Todd


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I would like to handle invalid directives however they are just
passing through the templating engine as text, e.g. using the following
FTL "blah.ftl":

This is [#blah]content[/#blah]. This is [#fu] content.

and the code:

public class App {

  public static void main(String[] args) throws Exception {
    Configuration cfg = new Configuration();
    System.out.println("Compiling template: blah.ftl");
    FileReader reader = new
FileReader(System.getProperty("user.dir") + "/blah.ftl");
    // Expect ParseException
    Template template = new Template("blah.ftl", reader, cfg);

    System.out.println("Getting template from Configuration.");
    // Also expect ParseException
    template = cfg.getTemplate("blah.ftl");
    StringWriter writer = new StringWriter();
    template.process(new HashMap(), writer);
    System.out.println("Output: " + writer.toString());

I get the output:

This is [#blah]content[/#blah]. This is [#fu] content.

In each Template reference, I'm expecting a compilation error w/
"Unknown directive" per the FMParser.jj grammar. Any suggestions?


John T.

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