/// <summary>
/// Processes an artifacts collection using the Snowball stemming algorithm.
/// </summary>
/// <param name="artifacts">Artifacts collection</param>
/// <param name="langauge">Stemmer language</param>
/// <returns>Stemmed artifacts</returns>
public static TLArtifactsCollection ProcessArtifacts(TLArtifactsCollection artifacts, SnowballStemmerEnum langauge)
{
TLArtifactsCollection processed = new TLArtifactsCollection();
foreach (TLArtifact artifact in artifacts.Values)
{
TLArtifact processedArtifact = new TLArtifact(artifact.Id, String.Empty);
processedArtifact.Text = ProcessText(artifact.Text, langauge);
processed.Add(processedArtifact);
}
return processed;
}
/// <summary>
/// Returns a stemmer object that implements the Snowball stemmer algorithm in the given language.
/// </summary>
/// <param name="language">Language</param>
/// <returns>Snowball stemmer</returns>
public static ISnowballStemmer GetStemmer(SnowballStemmerEnum language)
{
switch (language)
{
case SnowballStemmerEnum.Czech:
return new CzechStemmer();
case SnowballStemmerEnum.Danish:
return new DanishStemmer();
case SnowballStemmerEnum.Dutch:
return new DutchStemmer();
case SnowballStemmerEnum.Finnish:
return new FinnishStemmer();
case SnowballStemmerEnum.French:
return new FrenchStemmer();
case SnowballStemmerEnum.German:
return new GermanStemmer();
case SnowballStemmerEnum.Hungarian:
return new HungarianStemmer();
case SnowballStemmerEnum.Italian:
return new ItalianStemmer();
case SnowballStemmerEnum.Norwegian:
return new NorwegianStemmer();
case SnowballStemmerEnum.Portuguese:
return new PortugalStemmer();
case SnowballStemmerEnum.Romanian:
return new RomanianStemmer();
case SnowballStemmerEnum.Russian:
return new RussianStemmer();
case SnowballStemmerEnum.Spanish:
return new SpanishStemmer();
case SnowballStemmerEnum.English:
case SnowballStemmerEnum.Default:
default:
return new EnglishStemmer();
}
}
/// <summary>
/// Returns a stemmer object that implements the Snowball stemmer algorithm in the given language.
/// </summary>
/// <param name="language">Language</param>
/// <returns>Snowball stemmer</returns>
public static ISnowballStemmer GetStemmer(SnowballStemmerEnum language)
{
switch (language)
{
case SnowballStemmerEnum.Czech:
return(new CzechStemmer());
case SnowballStemmerEnum.Danish:
return(new DanishStemmer());
case SnowballStemmerEnum.Dutch:
return(new DutchStemmer());
case SnowballStemmerEnum.Finnish:
return(new FinnishStemmer());
case SnowballStemmerEnum.French:
return(new FrenchStemmer());
case SnowballStemmerEnum.German:
return(new GermanStemmer());
case SnowballStemmerEnum.Hungarian:
return(new HungarianStemmer());
case SnowballStemmerEnum.Italian:
return(new ItalianStemmer());
case SnowballStemmerEnum.Norwegian:
return(new NorwegianStemmer());
case SnowballStemmerEnum.Portuguese:
return(new PortugalStemmer());
case SnowballStemmerEnum.Romanian:
return(new RomanianStemmer());
case SnowballStemmerEnum.Russian:
return(new RussianStemmer());
case SnowballStemmerEnum.Spanish:
return(new SpanishStemmer());
case SnowballStemmerEnum.English:
case SnowballStemmerEnum.Default:
default:
return(new EnglishStemmer());
}
}
/// <summary>
/// Processes a string of terms using the Snowball stemming algorithm.
/// </summary>
/// <param name="text">Input string</param>
/// <param name="language">Stemmer language</param>
/// <returns>Stemmed terms</returns>
public static string ProcessText(string text, SnowballStemmerEnum language)
{
StringBuilder builder = new StringBuilder();
string result = string.Empty;
string stemmedWord;
char[] delimiterChars = { ' ' };
string[] tokens = text.Split(delimiterChars);
ISnowballStemmer stemmer = SnowballStemmerUtils.GetStemmer(language);
foreach (string token in tokens)
{
stemmedWord = stemmer.Stem(token);
builder.AppendFormat("{0} ", stemmedWord);
}
result = builder.ToString().Trim();
return result;
}
/// <summary>
/// Processes a string of terms using the Snowball stemming algorithm.
/// </summary>
/// <param name="text">Input string</param>
/// <param name="language">Stemmer language</param>
/// <returns>Stemmed terms</returns>
public static string ProcessText(string text, SnowballStemmerEnum language)
{
StringBuilder builder = new StringBuilder();
string result = string.Empty;
string stemmedWord;
char[] delimiterChars = { ' ' };
string[] tokens = text.Split(delimiterChars);
ISnowballStemmer stemmer = SnowballStemmerUtils.GetStemmer(language);
foreach (string token in tokens)
{
stemmedWord = stemmer.Stem(token);
builder.AppendFormat("{0} ", stemmedWord);
}
result = builder.ToString().Trim();
return(result);
}
/// <summary>
/// Processes an artifacts collection using the Snowball stemming algorithm.
/// </summary>
/// <param name="artifacts">Artifacts collection</param>
/// <param name="langauge">Stemmer language</param>
/// <returns>Stemmed artifacts</returns>
public static TLArtifactsCollection ProcessArtifacts(TLArtifactsCollection artifacts, SnowballStemmerEnum langauge)
{
TLArtifactsCollection processed = new TLArtifactsCollection();
foreach (TLArtifact artifact in artifacts.Values)
{
TLArtifact processedArtifact = new TLArtifact(artifact.Id, String.Empty);
processedArtifact.Text = ProcessText(artifact.Text, langauge);
processed.Add(processedArtifact);
}
return(processed);
}
