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();
}
