private void parseRenderer() {
    String rendererName = isMinimal() ? "minimal" :
        m_uriInfo.getQueryParameters().getFirst(QueryLexer.QUERY_FORMAT);
    m_renderer = m_resource.getResourceDefinition().
        getRenderer(rendererName);
  }
Parse the query string for the {@link QueryLexer#QUERY_FORMAT} property and obtain
a renderer from the associated resource definition based on this property value.
ambari-server/src/main/java/org/apache/ambari/server/api/services/BaseRequest.java