public static MetaData fromXContent(XContentParser parser) throws IOException { Builder builder = new Builder(); // we might get here after the meta-data element, or on a fresh parser XContentParser.Token token = parser.currentToken(); String currentFieldName = parser.currentName(); if (!"meta-data".equals(currentFieldName)) { token = parser.nextToken(); if (token == XContentParser.Token.START_OBJECT) { // move to the field name (meta-data) token = parser.nextToken(); if (token != XContentParser.Token.FIELD_NAME) { throw new IllegalArgumentException("Expected a field name but got " + token); } // move to the next object token = parser.nextToken(); } currentFieldName = parser.currentName(); } if (!"meta-data".equals(parser.currentName())) { throw new IllegalArgumentException( "Expected [meta-data] as a field name but got " + currentFieldName); } if (token != XContentParser.Token.START_OBJECT) { throw new IllegalArgumentException("Expected a START_OBJECT but got " + token); } while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) { if (token == XContentParser.Token.FIELD_NAME) { currentFieldName = parser.currentName(); } else if (token == XContentParser.Token.START_OBJECT) { if ("settings".equals(currentFieldName)) { builder.persistentSettings( Settings.settingsBuilder() .put(SettingsLoader.Helper.loadNestedFromMap(parser.mapOrdered())) .build()); } else if ("indices".equals(currentFieldName)) { while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) { builder.put(IndexMetaData.Builder.fromXContent(parser), false); } } else if ("templates".equals(currentFieldName)) { while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) { builder.put(IndexTemplateMetaData.Builder.fromXContent(parser, parser.currentName())); } } else { // check if its a custom index metadata Custom proto = lookupPrototype(currentFieldName); if (proto == null) { // TODO warn parser.skipChildren(); } else { Custom custom = proto.fromXContent(parser); builder.putCustom(custom.type(), custom); } } } else if (token.isValue()) { if ("version".equals(currentFieldName)) { builder.version = parser.longValue(); } else if ("cluster_uuid".equals(currentFieldName) || "uuid".equals(currentFieldName)) { builder.clusterUUID = parser.text(); } else { throw new IllegalArgumentException("Unexpected field [" + currentFieldName + "]"); } } else { throw new IllegalArgumentException("Unexpected token " + token); } } return builder.build(); }