SnowballAnalyzerBuilder.java 文件源码

/**
 * Builds a new {@link SnowballAnalyzerBuilder} for the specified language and stopwords.
 *
 * @param language  The language. The supported languages are English, French, Spanish, Portuguese, Italian,
 *                  Romanian, German, Dutch, Swedish, Norwegian, Danish, Russian, Finnish, Irish, Hungarian,
 *                  Turkish, Armenian, Basque and Catalan.
 * @param stopwords The comma separated stopwords {@code String}.
 */
@JsonCreator
public SnowballAnalyzerBuilder(@JsonProperty("language") final String language,
                               @JsonProperty("stopwords") String stopwords) {

    // Check language
    if (language == null || language.trim().isEmpty()) {
        throw new IllegalArgumentException("Language must be specified");
    }

    // Setup stopwords
    CharArraySet stops = stopwords == null ? getDefaultStopwords(language) : getStopwords(stopwords);

    // Setup analyzer
    this.analyzer = buildAnalyzer(language, stops);

    // Force analysis validation
    AnalysisUtils.analyzeAsText("test", analyzer);
}