Example usage for org.apache.lucene.search.suggest.analyzing AnalyzingInfixSuggester commit

Introduction

In this page you can find the example usage for org.apache.lucene.search.suggest.analyzing AnalyzingInfixSuggester commit.

Prototype

public void commit() throws IOException 

Source Link

Document

Commits all pending changes made to this suggester to disk.

Usage

From source file:org.lukhnos.lucenestudy.Suggester.java

License:MIT License

/**
 * Rebuild a suggestion index from the document index.
 *
 * This method iterates through the entire document index and makes sure that only unique titles
 * are indexed.//from   ww  w.  ja  v  a2s .  c  o  m
 *
 * @param indexRoot The parent directory inside which both the document index and the suggestion
 *                  index lives.
 * @throws IOException
 */
public static void rebuild(String indexRoot) throws IOException {
    Path indexRootPath = Paths.get(indexRoot);
    Path suggestionPath = getSuggestionIndexPath(indexRootPath);

    // Delete the suggestion index if it exists.
    if (Files.exists(suggestionPath)) {
        Util.deletePath(suggestionPath);
    }

    // Create the suggestion index.
    Analyzer analyzer = Indexer.getAnalyzer();
    Directory suggestionDir = FSDirectory.open(getSuggestionIndexPath(indexRootPath));
    AnalyzingInfixSuggester suggester = new AnalyzingInfixSuggester(suggestionDir, analyzer);

    // Open the document index.
    Directory indexDir = FSDirectory.open(Indexer.getMainIndexPath(indexRootPath));
    IndexReader reader = DirectoryReader.open(indexDir);

    // Get a document iterator.
    DocumentDictionary docDict = new DocumentDictionary(reader, Indexer.TITLE_FIELD_NAME, null);
    InputIterator iterator = docDict.getEntryIterator();
    Set<BytesRef> titleSet = new HashSet<>();
    BytesRef next;
    while ((next = iterator.next()) != null) {
        if (titleSet.contains(next)) {
            continue;
        }

        titleSet.add(next);
        suggester.add(next, null, 0, null);
    }

    reader.close();

    suggester.commit();
    suggester.close();
}

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