/// <summary>
/// Construct the named stemming filter.
///
/// Available stemmers are listed in <seealso cref="org.tartarus.snowball.ext"/>.
/// The name of a stemmer is the part of the class name before "Stemmer",
/// e.g., the stemmer in <seealso cref="org.tartarus.snowball.ext.EnglishStemmer"/> is named "English".
/// </summary>
/// <param name="in"> the input tokens to stem </param>
/// <param name="name"> the name of a stemmer </param>
public SnowballFilter(TokenStream @in, string name)
: base(@in)
{
//Class.forName is frowned upon in place of the ResourceLoader but in this case,
// the factory will use the other constructor so that the program is already loaded.
try
{
Type stemClass = Type.GetType("org.tartarus.snowball.ext." + name + "Stemmer").asSubclass(typeof(SnowballProgram));
stemmer = stemClass.newInstance();
}
catch (Exception e)
{
throw new System.ArgumentException("Invalid stemmer class specified: " + name, e);
}
}
public SnowballPorterFilter(TokenStream source, SnowballProgram stemmer, CharArraySet protWords) : base(source)
{
this.protWords = protWords;
this.stemmer = stemmer;
this.termAtt = (TermAttribute)addAttribute(typeof(TermAttribute));
}
public SnowballFilter(TokenStream input, SnowballProgram stemmer)
: base(input)
{
this.stemmer = stemmer;
}
