ParentChildIndexFieldData.java 文件源码

public ParentChildIndexFieldData(Index index, Settings indexSettings, MappedFieldType.Names fieldNames,
                                 FieldDataType fieldDataType, IndexFieldDataCache cache, MapperService mapperService,
                                 CircuitBreakerService breakerService) {
    super(index, indexSettings, fieldNames, fieldDataType, cache);
    this.breakerService = breakerService;
    if (Version.indexCreated(indexSettings).before(Version.V_2_0_0_beta1)) {
        parentTypes = new TreeSet<>();
        for (DocumentMapper documentMapper : mapperService.docMappers(false)) {
            beforeCreate(documentMapper);
        }
        mapperService.addTypeListener(this);
    } else {
        ImmutableSortedSet.Builder<String> builder = ImmutableSortedSet.naturalOrder();
        for (DocumentMapper mapper : mapperService.docMappers(false)) {
            ParentFieldMapper parentFieldMapper = mapper.parentFieldMapper();
            if (parentFieldMapper.active()) {
                builder.add(parentFieldMapper.type());
            }
        }
        parentTypes = builder.build();
    }
}