Example usage for org.apache.lucene.search.spell SpellChecker SpellChecker

Introduction

In this page you can find the example usage for org.apache.lucene.search.spell SpellChecker SpellChecker.

Prototype

public SpellChecker(Directory spellIndex, StringDistance sd, Comparator<SuggestWord> comparator)
        throws IOException 

Source Link

Document

Use the given directory as a spell checker index with the given org.apache.lucene.search.spell.StringDistance measure and the given java.util.Comparator for sorting the results.

Usage

From source file:org.apache.solr.spelling.AbstractLuceneSpellChecker.java

License:Apache License

@Override
public String init(NamedList config, SolrCore core) {
    super.init(config, core);
    indexDir = (String) config.get(INDEX_DIR);
    String accuracy = (String) config.get(ACCURACY);
    //If indexDir is relative then create index inside core.getDataDir()
    if (indexDir != null) {
        if (!new File(indexDir).isAbsolute()) {
            indexDir = core.getDataDir() + File.separator + indexDir;
        }/*  www .  ja v a2s .  c  o  m*/
    }
    sourceLocation = (String) config.get(LOCATION);
    String compClass = (String) config.get(COMPARATOR_CLASS);
    Comparator<SuggestWord> comp = null;
    if (compClass != null) {
        if (compClass.equalsIgnoreCase(SCORE_COMP)) {
            comp = SuggestWordQueue.DEFAULT_COMPARATOR;
        } else if (compClass.equalsIgnoreCase(FREQ_COMP)) {
            comp = new SuggestWordFrequencyComparator();
        } else {//must be a FQCN
            comp = (Comparator<SuggestWord>) core.getResourceLoader().newInstance(compClass, Comparator.class);
        }
    } else {
        comp = SuggestWordQueue.DEFAULT_COMPARATOR;
    }
    String strDistanceName = (String) config.get(STRING_DISTANCE);
    if (strDistanceName != null) {
        sd = core.getResourceLoader().newInstance(strDistanceName, StringDistance.class);
        //TODO: Figure out how to configure options.  Where's Spring when you need it?  Or at least BeanUtils...
    } else {
        sd = new LevensteinDistance();
    }
    try {
        initIndex();
        spellChecker = new SpellChecker(index, sd, comp);
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
    if (accuracy != null) {
        try {
            this.accuracy = Float.parseFloat(accuracy);
            spellChecker.setAccuracy(this.accuracy);
        } catch (NumberFormatException e) {
            throw new RuntimeException("Unparseable accuracy given for dictionary: " + name, e);
        }
    }
    return name;
}

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