request.java

 private static class RequestImpl implements Request {

            private final String uri;
                
            public RequestImpl(String uri) {
                this.uri = uri;
            }

            @Override
            public String getRequestURI() {
                return uri;
            }

            @Override
            public String getHeader(String name) {
                return null;
            }

            @Override
            public String getRemoteUser() {
                return null;
            }

            @Override
            public Enumeration getParameterNames() {
                return Collections.enumeration(Collections.EMPTY_LIST);
            }

            @Override
            public String[] getParameterValues(String name) {
                return new String[0];
            }

            @Override
            public Object getAttribute(String name) {
                return null;
            }
        }

request.scala

class RequestImpl(url: String) extends Request {
  override def getRequestURI = url
  override def getHeader(name: String) = null
  override def getRemoteUser = null
  override def getParameterNames = Collections.enumeration(Collections.EMPTY_LIST);
  override def getParameterValues(name: String) = Array[String]()
  override def getAttribute(name: String) = null
}