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Re: [FreeMarker-user] Detect invalid directives

Daniel Dekany

2011-10-19

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Wednesday, October 19, 2011, 5:55:18 AM, John Todd wrote:

> Hello,
>
>  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.

That's not possible, unless you pre-process the templates with a
custom TemplateLoader that replaces "[#blah]" with "[[#-- --]#blah]"
or like.

Out of curiosity, why do you need this?

> and the code:
>
> public class App {
>
>   public static void main(String[] args) throws Exception {
>      Configuration cfg = new Configuration();
>      cfg.setTagSyntax(Configuration.SQUARE_BRACKET_TAG_SYNTAX);
>    
>      cfg.setDirectoryForTemplateLoading(new
> File(System.getProperty("user.dir")));
>    
>      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?
>
> Thanks,
>
> John T.

--
Best regards,
Daniel Dekany


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