Java TokenizerFactory.create方法代碼示例

import org.elasticsearch.index.analysis.TokenizerFactory; //導入方法依賴的package包/類
private static TokenStream createStackedTokenStream(String source, CharFilterFactory[] charFilterFactories, TokenizerFactory tokenizerFactory, TokenFilterFactory[] tokenFilterFactories, int current) {
    Reader reader = new FastStringReader(source);
    for (CharFilterFactory charFilterFactory : charFilterFactories) {
        reader = charFilterFactory.create(reader);
    }
    Tokenizer tokenizer = tokenizerFactory.create();
    tokenizer.setReader(reader);
    TokenStream tokenStream = tokenizer;
    for (int i = 0; i < current; i++) {
        tokenStream = tokenFilterFactories[i].create(tokenStream);
    }
    return tokenStream;
}
 

import org.elasticsearch.index.analysis.TokenizerFactory; //導入方法依賴的package包/類
public DynamicSynonymTokenFilterFactory(IndexSettings indexSettings, Environment env, AnalysisRegistry analysisRegistry,
                                        String name, Settings settings) throws IOException {

    //加載配置
    super(indexSettings, name, settings);
    this.indexName = indexSettings.getIndex().getName();
    this.interval = settings.getAsInt("interval", 60);
    this.ignoreCase = settings.getAsBoolean("ignore_case", false);
    this.expand = settings.getAsBoolean("expand", true);
    this.format = settings.get("format", "");
    this.location = settings.get("synonyms_path");

    logger.info("indexName:{} synonyms_path:{} interval:{} ignore_case:{} expand:{} format:{}",
            indexName, location, interval, ignoreCase, expand, format);

    //屬性檢查
    if (this.location == null) {
        throw new IllegalArgumentException(
                "dynamic synonym requires `synonyms_path` to be configured");
    }

    String tokenizerName = settings.get("tokenizer", "whitespace");
    AnalysisModule.AnalysisProvider<TokenizerFactory> tokenizerFactoryFactory =
            analysisRegistry.getTokenizerProvider(tokenizerName, indexSettings);
    if (tokenizerFactoryFactory == null) {
        throw new IllegalArgumentException("failed to find tokenizer [" + tokenizerName + "] for synonym token filter");
    }
    final TokenizerFactory tokenizerFactory = tokenizerFactoryFactory.get(indexSettings, env, tokenizerName,
            AnalysisRegistry.getSettingsFromIndexSettings(indexSettings, AnalysisRegistry.INDEX_ANALYSIS_TOKENIZER + "." + tokenizerName));
    Analyzer analyzer = new Analyzer() {
        @Override
        protected TokenStreamComponents createComponents(String fieldName) {
            Tokenizer tokenizer = tokenizerFactory == null ? new WhitespaceTokenizer() : tokenizerFactory.create();
            TokenStream stream = ignoreCase ? new LowerCaseFilter(tokenizer) : tokenizer;
            return new TokenStreamComponents(tokenizer, stream);
        }
    };


    //根據location前綴初始化同義詞更新策略
    SynonymFile synonymFile;
    if (location.startsWith("http://")) {
        synonymFile = new RemoteSynonymFile(env, analyzer, expand, format, location);
    } else {
        synonymFile = new LocalSynonymFile(env, analyzer, expand, format, location);
    }
    synonymMap = synonymFile.reloadSynonymMap();

    //加入監控隊列，定時load
    scheduledFutures.putIfAbsent(this.indexName, new CopyOnWriteArrayList<ScheduledFuture>());
    scheduledFutures.get(this.indexName)
            .add(monitorPool.scheduleAtFixedRate(new Monitor(synonymFile), interval, interval, TimeUnit.SECONDS));
}
 

import org.elasticsearch.index.analysis.TokenizerFactory; //導入方法依賴的package包/類
public SynonymTokenFilterFactory(final IndexSettings indexSettings, final Environment environment, final String name, final Settings settings,
        final AnalysisRegistry analysisRegistry) throws IOException {
    super(indexSettings, name, settings);

    this.ignoreCase = settings.getAsBoolean("ignore_case", false);
    final boolean expand = settings.getAsBoolean("expand", true);

    final String tokenizerName = settings.get("tokenizer", "whitespace");

    AnalysisModule.AnalysisProvider<TokenizerFactory> tokenizerFactoryFactory = null;
    if (analysisRegistry != null) {
        tokenizerFactoryFactory = analysisRegistry.getTokenizerProvider(tokenizerName, indexSettings);
        if (tokenizerFactoryFactory == null) {
            throw new IllegalArgumentException("failed to find tokenizer [" + tokenizerName + "] for synonym token filter");
        }
    }

    final TokenizerFactory tokenizerFactory = tokenizerFactoryFactory == null ? null
            : tokenizerFactoryFactory.get(indexSettings, environment, tokenizerName, AnalysisRegistry
                    .getSettingsFromIndexSettings(indexSettings, AnalysisRegistry.INDEX_ANALYSIS_TOKENIZER + "." + tokenizerName));

    final Analyzer analyzer = new Analyzer() {
        @Override
        protected TokenStreamComponents createComponents(final String fieldName) {
            final Tokenizer tokenizer = tokenizerFactory == null ? new WhitespaceTokenizer() : tokenizerFactory.create();
            final TokenStream stream = ignoreCase ? new LowerCaseFilter(tokenizer) : tokenizer;
            return new TokenStreamComponents(tokenizer, stream);
        }
    };

    synonymLoader = new SynonymLoader(environment, settings, expand, analyzer);
    if (synonymLoader.getSynonymMap() == null) {
        if (settings.getAsList("synonyms", null) != null) {
            logger.warn("synonyms values are empty.");
        } else if (settings.get("synonyms_path") != null) {
            logger.warn("synonyms_path[{}] is empty.", settings.get("synonyms_path"));
        } else {
            throw new IllegalArgumentException("synonym requires either `synonyms` or `synonyms_path` to be configured");
        }
    }
}