Methods with parameter in Scala

[Mike Murray]

Hi,

I'm using Finatra which uses Mustache.java in Scala. I'm having trouble getting it to work with template functions that take a parameter. I'm not sure if it's a bug or if I'm misusing the library.

My view class that is fed to mustache.execute looks something like this:

class MyView {

  def paramTest(s: String): String = "You passed in: %s".format(s)

}

And I try to use the paramTest method in my template: {{#paramTest}}hello{{/paramTest}}

It *does not* work, nothing is printed out.

However, if I try a function without any parameters:

class MyView {

  def paramTest(): String = "You passed in: hardcoded"

}

And then use it like: {{paramTest}}

It *does* work as expected.

If this is a bug I will open an issue and create a test case, otherwise I would appreciate some pointers around what I'm doing wrong.

Also, in case it is relevant, Finatra sets the object handler to TwitterObjectHandler:

  mustacheFactory.setObjectHandler(new TwitterObjectHandler)

Thanks!

[Sam Pullara]

We don't support using methods with parameters directly. You will need to return a Function (Guava) object from the method if you want the content to be passed. Implement TemplateFunction if you want the return value to be reinterpreted as a template. 

Sam

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[onkar singh]

Hello Sam,

Does the guava function approach work ?  Because i am trying to make the function call happen, however it never gets executed.   I have omitted 'test' method because that has been taken from MustacheTest.java.  My output is always  "d"

public class CSSController {
   public static class CSS {
         public Function<String, String> c() {
             return new Function<String, String>() {

                  public String apply(String property) {
                       return "test";
                   }
          };
   }
 }

 @Test
 public void testMethodVariable() {
 CSS css = new CSS();
 test("bar", "{{#c}}d{{/c}}", css);
 }

[Sam]

Are you using 0.8 or 0.9? In 0.9 we have switched to  the Java 8 Function interface and dropped the dependency on guava.

Sam