private ValueFieldConfig getValueFieldConfig(PrestoTopic valueTopic, String valueFieldId) {
String valueTypeId = valueTopic.getTypeId();
ValueFieldConfig valueFieldConfig = valueFieldConfigCache.get(valueTypeId);
if (valueFieldConfig == null) {
PrestoDataProvider dataProvider = presto.getDataProvider();
PrestoSchemaProvider schemaProvider = presto.getSchemaProvider();
PrestoType valueType = schemaProvider.getTypeById(valueTypeId);
PrestoField valueField = valueType.getFieldById(valueFieldId);
Comparator<Object> valueComparator = null;
ObjectNode extra = ExtraUtils.getFieldExtraNode(valueField);
if (extra != null) {
JsonNode handlerNode = extra.path("valueComparator");
if (handlerNode.isObject()) {
FieldValueComparator handler =
AbstractHandler.getHandler(
dataProvider,
schemaProvider,
FieldValueComparator.class,
(ObjectNode) handlerNode);
if (handler != null) {
handler.setPresto(presto);
}
valueComparator = handler;
}
}
if (valueComparator == null) {
valueComparator = new FieldComparator(valueField, false);
}
valueFieldConfig = new ValueFieldConfig(presto, rules, field, valueField, valueComparator);
valueFieldConfigCache.put(valueTypeId, valueFieldConfig);
}
return valueFieldConfig;
}
