builder.startObject("mappings");
for (Map.Entry<String, CompressedString> entry : indexMetaData.mappings().entrySet()) {
byte[] mappingSource = entry.getValue().uncompressed();
XContentParser parser = XContentFactory.xContent(mappingSource).createParser(mappingSource);
Map<String, Object> mapping = parser.map();
if (mapping.size() == 1 && mapping.containsKey(entry.getKey())) {
// the type name is the root value, reduce it
mapping = (Map<String, Object>) mapping.get(entry.getKey());
}
builder.field(entry.getKey());