VelocityRenderer.java

import org.apache.velocity.app.Velocity
import org.apache.velocity.VelocityContext
import java.io.StringWriter

public class VelocityRenderer {


  public String render(Map<String, String> map, String resource) {
    StringWriter stringWriter = new StringWriter();
    VelocityContext context = new VelocityContext(map);
    Velocity.evaluate(context, stringWriter, resource, getClass().getResourceFromStream(resource));
    return stringWriter.toString();
  }
}