Examples with AnalyzerComponents org.opensearch.index.analysis.AnalyzerComponents used on opensource projects

Example 1 with AnalyzerComponents

use of org.opensearch.index.analysis.AnalyzerComponents in project OpenSearch by opensearch-project.

the class TransportAnalyzeAction method detailAnalyze.

private static AnalyzeAction.DetailAnalyzeResponse detailAnalyze(AnalyzeAction.Request request, Analyzer analyzer, int maxTokenCount) {
    AnalyzeAction.DetailAnalyzeResponse detailResponse;
    final Set<String> includeAttributes = new HashSet<>();
    if (request.attributes() != null) {
        for (String attribute : request.attributes()) {
            includeAttributes.add(attribute.toLowerCase(Locale.ROOT));
        }
    }
    // maybe unwrap analyzer from NamedAnalyzer
    Analyzer potentialCustomAnalyzer = analyzer;
    if (analyzer instanceof NamedAnalyzer) {
        potentialCustomAnalyzer = ((NamedAnalyzer) analyzer).analyzer();
    }
    if (potentialCustomAnalyzer instanceof AnalyzerComponentsProvider) {
        AnalyzerComponentsProvider customAnalyzer = (AnalyzerComponentsProvider) potentialCustomAnalyzer;
        // note: this is not field-name dependent in our cases so we can leave out the argument
        int positionIncrementGap = potentialCustomAnalyzer.getPositionIncrementGap("");
        int offsetGap = potentialCustomAnalyzer.getOffsetGap("");
        AnalyzerComponents components = customAnalyzer.getComponents();
        // divide charfilter, tokenizer tokenfilters
        CharFilterFactory[] charFilterFactories = components.getCharFilters();
        TokenizerFactory tokenizerFactory = components.getTokenizerFactory();
        TokenFilterFactory[] tokenFilterFactories = components.getTokenFilters();
        String[][] charFiltersTexts = new String[charFilterFactories != null ? charFilterFactories.length : 0][request.text().length];
        TokenListCreator[] tokenFiltersTokenListCreator = new TokenListCreator[tokenFilterFactories != null ? tokenFilterFactories.length : 0];
        TokenListCreator tokenizerTokenListCreator = new TokenListCreator(maxTokenCount);
        for (int textIndex = 0; textIndex < request.text().length; textIndex++) {
            String charFilteredSource = request.text()[textIndex];
            Reader reader = new StringReader(charFilteredSource);
            if (charFilterFactories != null) {
                for (int charFilterIndex = 0; charFilterIndex < charFilterFactories.length; charFilterIndex++) {
                    reader = charFilterFactories[charFilterIndex].create(reader);
                    Reader readerForWriteOut = new StringReader(charFilteredSource);
                    readerForWriteOut = charFilterFactories[charFilterIndex].create(readerForWriteOut);
                    charFilteredSource = writeCharStream(readerForWriteOut);
                    charFiltersTexts[charFilterIndex][textIndex] = charFilteredSource;
                }
            }
            // analyzing only tokenizer
            Tokenizer tokenizer = tokenizerFactory.create();
            tokenizer.setReader(reader);
            tokenizerTokenListCreator.analyze(tokenizer, includeAttributes, positionIncrementGap, offsetGap);
            // analyzing each tokenfilter
            if (tokenFilterFactories != null) {
                for (int tokenFilterIndex = 0; tokenFilterIndex < tokenFilterFactories.length; tokenFilterIndex++) {
                    if (tokenFiltersTokenListCreator[tokenFilterIndex] == null) {
                        tokenFiltersTokenListCreator[tokenFilterIndex] = new TokenListCreator(maxTokenCount);
                    }
                    TokenStream stream = createStackedTokenStream(request.text()[textIndex], charFilterFactories, tokenizerFactory, tokenFilterFactories, tokenFilterIndex + 1);
                    tokenFiltersTokenListCreator[tokenFilterIndex].analyze(stream, includeAttributes, positionIncrementGap, offsetGap);
                }
            }
        }
        AnalyzeAction.CharFilteredText[] charFilteredLists = new AnalyzeAction.CharFilteredText[charFiltersTexts.length];
        if (charFilterFactories != null) {
            for (int charFilterIndex = 0; charFilterIndex < charFiltersTexts.length; charFilterIndex++) {
                charFilteredLists[charFilterIndex] = new AnalyzeAction.CharFilteredText(charFilterFactories[charFilterIndex].name(), charFiltersTexts[charFilterIndex]);
            }
        }
        AnalyzeAction.AnalyzeTokenList[] tokenFilterLists = new AnalyzeAction.AnalyzeTokenList[tokenFiltersTokenListCreator.length];
        if (tokenFilterFactories != null) {
            for (int tokenFilterIndex = 0; tokenFilterIndex < tokenFiltersTokenListCreator.length; tokenFilterIndex++) {
                tokenFilterLists[tokenFilterIndex] = new AnalyzeAction.AnalyzeTokenList(tokenFilterFactories[tokenFilterIndex].name(), tokenFiltersTokenListCreator[tokenFilterIndex].getArrayTokens());
            }
        }
        detailResponse = new AnalyzeAction.DetailAnalyzeResponse(charFilteredLists, new AnalyzeAction.AnalyzeTokenList(tokenizerFactory.name(), tokenizerTokenListCreator.getArrayTokens()), tokenFilterLists);
    } else {
        String name;
        if (analyzer instanceof NamedAnalyzer) {
            name = ((NamedAnalyzer) analyzer).name();
        } else {
            name = analyzer.getClass().getName();
        }
        TokenListCreator tokenListCreator = new TokenListCreator(maxTokenCount);
        for (String text : request.text()) {
            tokenListCreator.analyze(analyzer.tokenStream("", text), includeAttributes, analyzer.getPositionIncrementGap(""), analyzer.getOffsetGap(""));
        }
        detailResponse = new AnalyzeAction.DetailAnalyzeResponse(new AnalyzeAction.AnalyzeTokenList(name, tokenListCreator.getArrayTokens()));
    }
    return detailResponse;
}