in src/main/java/org/apache/sling/servlets/get/impl/DefaultGetServlet.java [213:227]
private Renderer getDefaultRenderer(final String type) {
Renderer renderer = null;
if (EXT_RES.equals(type)) {
renderer = new StreamRenderer(index, indexFiles, getServletContext());
} else if (EXT_HTML.equals(type)) {
renderer = HtmlRenderer.INSTANCE;
} else if (EXT_TXT.equals(type)) {
renderer = new PlainTextRenderer();
} else if (EXT_JSON.equals(type)) {
renderer = new JsonRenderer(jsonMaximumResults, enableEcmaSupport);
} else if (EXT_XML.equals(type)) {
renderer = new XMLRenderer();
}
return renderer;
}