private static void Main(string[] args)
{
var ramDirectory = new RAMDirectory();
var spellChecker = new SpellChecker.Net.Search.Spell.SpellChecker(ramDirectory);
var ms = new MemoryStream();
var sw = new StreamWriter(ms);
sw.WriteLine("Book");
sw.WriteLine("Bath");
sw.WriteLine("Bed");
sw.WriteLine("Make");
sw.WriteLine("Model");
sw.WriteLine("Vacum");
sw.WriteLine("Wending machine");
sw.Flush();
ms.Position = 0;
spellChecker.setStringDistance(new JaroWinklerDistance());
spellChecker.SetAccuracy(0.3f);
spellChecker.IndexDictionary(new PlainTextDictionary(ms), CancellationToken.None);
var indexReader = IndexReader.Open(ramDirectory, true);
var termEnum = indexReader.Terms();
while (termEnum.Next())
{
Console.WriteLine(termEnum.Term);
}
var suggestSimilar = spellChecker.SuggestSimilar("both", 10);
foreach (var s in suggestSimilar)
{
Console.WriteLine(s);
}
}
public string[] GetSuggestedWords(string spellIndex, string term, int maxCount)
{
FSDirectory dir = FSDirectory.Open(spellIndex);
var spell = new SpellChecker.Net.Search.Spell.SpellChecker(dir);
spell.SetAccuracy(0.6f);
spell.setStringDistance(new LevenshteinDistance());
return(spell.SuggestSimilar(term, maxCount));
}
public SuggestionQueryResult ExecuteSuggestionQuery(string indexName, SuggestionQuery suggestionQuery)
{
if (suggestionQuery == null) throw new ArgumentNullException("suggestionQuery");
if (string.IsNullOrWhiteSpace(suggestionQuery.Term)) throw new ArgumentNullException("suggestionQuery.Term");
if (string.IsNullOrWhiteSpace(indexName)) throw new ArgumentNullException("indexName");
if (string.IsNullOrWhiteSpace(suggestionQuery.Field)) throw new ArgumentNullException("suggestionQuery.Field");
if (suggestionQuery.MaxSuggestions <= 0) suggestionQuery.MaxSuggestions = 10;
if (suggestionQuery.Accuracy <= 0 || suggestionQuery.Accuracy > 1) suggestionQuery.Accuracy = 0.5f;
suggestionQuery.MaxSuggestions = Math.Min(suggestionQuery.MaxSuggestions,
_database.Configuration.MaxPageSize);
var currentSearcher = _database.IndexStorage.GetCurrentIndexSearcher(indexName);
IndexSearcher searcher;
using(currentSearcher.Use(out searcher))
{
var indexReader = searcher.GetIndexReader();
var spellChecker = new SpellChecker.Net.Search.Spell.SpellChecker(new RAMDirectory(), GetStringDistance(suggestionQuery));
try
{
spellChecker.IndexDictionary(new LuceneDictionary(indexReader, suggestionQuery.Field));
spellChecker.SetAccuracy(suggestionQuery.Accuracy);
var suggestions = spellChecker.SuggestSimilar(suggestionQuery.Term,
suggestionQuery.MaxSuggestions,
indexReader,
suggestionQuery.Field,
true);
return new SuggestionQueryResult
{
Suggestions = suggestions
};
}
finally
{
spellChecker.Close();
// this is really stupid, but it doesn't handle this in its close method!
GC.SuppressFinalize(spellChecker);
}
}
}
public SuggestionQueryIndexExtension(Index indexInstance, WorkContext workContext, string key,
StringDistance distanceType, bool isRunInMemory, string field, float accuracy)
{
_indexInstance = indexInstance;
this.workContext = workContext;
this.field = field;
if (isRunInMemory)
{
directory = new RAMDirectory();
}
else
{
directory = FSDirectory.Open(new DirectoryInfo(key));
}
spellChecker = new SpellChecker.Net.Search.Spell.SpellChecker(directory, null);
spellChecker.SetAccuracy(accuracy);
spellChecker.setStringDistance(distanceType);
_operationText = "Suggestions for " + field + " " + distanceType + " (" + accuracy + ")";
}
public SuggestionQueryIndexExtension(Index indexInstance, WorkContext workContext, string key,
StringDistance distanceType, bool isRunInMemory, string field, float accuracy)
{
_indexInstance = indexInstance;
this.workContext = workContext;
this.field = field;
if (isRunInMemory)
{
directory = new RAMDirectory();
}
else
{
directory = FSDirectory.Open(new DirectoryInfo(key));
}
spellChecker = new SpellChecker.Net.Search.Spell.SpellChecker(directory, null);
spellChecker.SetAccuracy(accuracy);
spellChecker.setStringDistance(distanceType);
_operationText = "Suggestions for " + field + " " + distanceType + " (" + accuracy + ")";
}
public SuggestionQueryResult Query(SuggestionQuery suggestionQuery, IndexReader indexReader)
{
if (suggestionQuery.Accuracy.HasValue == false)
{
throw new InvalidOperationException("SuggestionQuery.Accuracy must be specified.");
}
if (suggestionQuery.Distance.HasValue == false)
{
throw new InvalidOperationException("SuggestionQuery.Distance must be specified.");
}
spellChecker.setStringDistance(SuggestionQueryRunner.GetStringDistance(suggestionQuery.Distance.Value));
spellChecker.SetAccuracy(suggestionQuery.Accuracy.Value);
if (suggestionQuery.Term.StartsWith("<<") && suggestionQuery.Term.EndsWith(">>"))
{
return(QueryOverMultipleWords(suggestionQuery, indexReader,
suggestionQuery.Term.Substring(2, suggestionQuery.Term.Length - 4)));
}
if (suggestionQuery.Term.StartsWith("(") && suggestionQuery.Term.EndsWith(")"))
{
return(QueryOverMultipleWords(suggestionQuery, indexReader,
suggestionQuery.Term.Substring(1, suggestionQuery.Term.Length - 2)));
}
string[] suggestions = spellChecker.SuggestSimilar(suggestionQuery.Term,
suggestionQuery.MaxSuggestions,
indexReader,
suggestionQuery.Field,
true);
return(new SuggestionQueryResult
{
Suggestions = suggestions
});
}
