*/
    protected Metadata readMetadata(File mappingFile) throws RepositoryMetadataReadException {

        try (InputStream in = Files.newInputStream(mappingFile.toPath())) {
            return new Metadata(new MetadataStaxReader().read(in, false));
        } catch (FileNotFoundException e) {
            throw new RepositoryMetadataReadException("Cannot read metadata from '" + mappingFile + "'", e);

        try (MappingUpdater updater = new MappingUpdater(null)) {
            reload(updater, in);
        }
    }

    @Override
    public String toString() {
        return "MappingFile [path=" + path + ", mappingItemList=" + mappingItemList + ", id=" + id + "]";
    }

    protected class MappingUpdater implements Closeable {

        protected boolean isCommit = false;

        if (indexMappings == null || !indexMappings.containsKey("properties")) {
            String source = null;
            final String mappingFile = getResourcePath(indexConfigPath, fessConfig.getFesenType(), "/" + index + "/" + docType + ".json");
            try {
                source = FileUtil.readUTF8(mappingFile);
                if (DOC_INDEX.equals(index)) {
                    for (final UnaryOperator<String> rule : docMappingRewriteRuleList) {