←  package.scala 

package ru.circumflex

import core._, freemarker._, web._
import java.io._
import _root_.freemarker.template._

The ftl package

Package ftl contains rendering methods, ftl for use in Circumflex Web Framework and ftl2xxx to render an FTL template into xxx. It also maintains Freemarker configuration, use ftlConfig to access it if you need custom operations, or use ftl.configuration configuration parameter to provide your own implementation of FreeMarker Configuration.

You should import this package to use Circumflex FreeMarker Helper in your application:

import ru.circumflex.freemarker._
 
package object freemarker {

  val ftlConfig: Configuration = cx.instantiate[Configuration](
    "ftl.configuration", new DefaultConfiguration)

  def ftl(template: String, data: Any = ctx): Nothing =
    response.body(r => ftlConfig.getTemplate(template).process(data, r.getWriter)).flush_!

  def ftl2string(template: String, root: Any = ctx): String = {
    val result = new StringWriter
    ftlConfig.getTemplate(template).process(root, result)
    return result.toString
  }

Configuring Object Wrapper

Circumflex FreeMarker Helper provides facilities to make Scala objects available inside FreeMarker templates. These facilities are implemented inside ScalaObjectWrapper.

There are couple of things which can be configured:

  • by default, all public fields can be resolved on any object (e.g. ${myObj.myField}); to disable this, set ftl.wrapper.resolveFields configuration parameter to false;
  • by default, all public methods can be resolved on any object (e.g. ${myObj.myMethod("Hello")}); to disable this, set ftl.wrapper.resolveMethods configuration parameter to false;
  • you can set ftl.wrapper.delegateToDefault configuration parameter to true in order to delegate resolving to FreeMarker's default object wrapper (ObjectWrapper.DEFAULT_WRAPPER); this can be useful if you work with Java types in your Scala applications (e.g. Java lists or maps); by default the delegation does not occur (null is returned if resolving fails).
 
  val resolveFields = cx.get("ftl.wrapper.resolveFields") match {
    case Some(b: Boolean) => b
    case Some(s: String) => s.toBoolean
    case _ => true
  }
  val resolveMethods = cx.get("ftl.wrapper.resolveMethods") match {
    case Some(b: Boolean) => b
    case Some(s: String) => s.toBoolean
    case _ => true
  }
  val delegateToDefault = cx.get("ftl.wrapper.delegateToDefault") match {
    case Some(b: Boolean) => b
    case Some(s: String) => s.toBoolean
    case _ => false
  }

}