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

Introduction

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

Prototype

public NGramDistance() 

Source Link

Document

Creates an N-Gram distance measure using n-grams of size 2.

Usage

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

License:Apache License

@Test
public void test() throws Exception {
    ConjunctionSolrSpellChecker cssc = new ConjunctionSolrSpellChecker();
    MockSolrSpellChecker levenstein1 = new MockSolrSpellChecker(new LevensteinDistance());
    MockSolrSpellChecker levenstein2 = new MockSolrSpellChecker(new LevensteinDistance());
    MockSolrSpellChecker ngram = new MockSolrSpellChecker(new NGramDistance());

    cssc.addChecker(levenstein1);//from w w w .  j av  a 2s .c  o  m
    cssc.addChecker(levenstein2);
    try {
        cssc.addChecker(ngram);
        fail("ConjunctionSolrSpellChecker should have thrown an exception about non-identical StringDistances.");
    } catch (IllegalArgumentException iae) {
        // correct behavior
    }
}

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From source file:org.elasticsearch.search.suggest.phrase.DirectCandidateGeneratorBuilder.java

License:Apache License

private static StringDistance resolveDistance(String distanceVal) {
    distanceVal = distanceVal.toLowerCase(Locale.US);
    if ("internal".equals(distanceVal)) {
        return DirectSpellChecker.INTERNAL_LEVENSHTEIN;
    } else if ("damerau_levenshtein".equals(distanceVal) || "damerauLevenshtein".equals(distanceVal)) {
        return new LuceneLevenshteinDistance();
    } else if ("levenstein".equals(distanceVal)) {
        return new LevensteinDistance();
        // TODO Jaro and Winkler are 2 people - so apply same naming logic
        // as damerau_levenshtein
    } else if ("jarowinkler".equals(distanceVal)) {
        return new JaroWinklerDistance();
    } else if ("ngram".equals(distanceVal)) {
        return new NGramDistance();
    } else {/*from w  w  w .  j  av a  2  s  .c o  m*/
        throw new IllegalArgumentException("Illegal distance option " + distanceVal);
    }
}

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From source file:org.elasticsearch.search.suggest.SuggestUtils.java

License:Apache License

public static StringDistance resolveDistance(String distanceVal) {
    if ("internal".equals(distanceVal)) {
        return DirectSpellChecker.INTERNAL_LEVENSHTEIN;
    } else if ("damerau_levenshtein".equals(distanceVal) || "damerauLevenshtein".equals(distanceVal)) {
        return new LuceneLevenshteinDistance();
    } else if ("levenstein".equals(distanceVal)) {
        return new LevensteinDistance();
        //TODO Jaro and Winkler are 2 people - so apply same naming logic as damerau_levenshtein  
    } else if ("jarowinkler".equals(distanceVal)) {
        return new JaroWinklerDistance();
    } else if ("ngram".equals(distanceVal)) {
        return new NGramDistance();
    } else {//from w  w w .j ava2 s.  com
        throw new ElasticsearchIllegalArgumentException("Illegal distance option " + distanceVal);
    }
}

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