/// <summary>
/// Return a tokenizer which might be suitable for tokenizing text that will be used with this
/// Treebank/Language pair, without tokenizing carriage returns (i.e., treating them as white
/// space).
/// </summary>
/// <remarks>
/// Return a tokenizer which might be suitable for tokenizing text that will be used with this
/// Treebank/Language pair, without tokenizing carriage returns (i.e., treating them as white
/// space). The implementation in AbstractTreebankLanguagePack returns a factory for
/// <see cref="Edu.Stanford.Nlp.Process.WhitespaceTokenizer{T}"/>
/// .
/// </remarks>
/// <returns>A tokenizer</returns>
public override ITokenizerFactory <IHasWord> GetTokenizerFactory()
{
return(SpanishTokenizer.Factory(new CoreLabelTokenFactory(), "invertible,ptb3Escaping=true,splitAll=true"));
}
/// <summary>
/// initFactory returns the right type of TokenizerFactory based on the options in the properties file
/// and the type.
/// </summary>
/// <remarks>
/// initFactory returns the right type of TokenizerFactory based on the options in the properties file
/// and the type. When adding a new Tokenizer, modify TokenizerType.getTokenizerType() to retrieve
/// your tokenizer from the properties file, and then add a class is the switch structure here to
/// instantiate the new Tokenizer type.
/// </remarks>
/// <param name="type">the TokenizerType</param>
/// <param name="props">the properties file</param>
/// <param name="extraOptions">extra things that should be passed into the tokenizer constructor</param>
/// <exception cref="System.ArgumentException"/>
private static ITokenizerFactory <CoreLabel> InitFactory(TokenizerAnnotator.TokenizerType type, Properties props, string extraOptions)
{
ITokenizerFactory <CoreLabel> factory;
string options = props.GetProperty("tokenize.options", null);
// set it to the equivalent of both extraOptions and options
// TODO: maybe we should always have getDefaultOptions() and
// expect the user to turn off default options. That would
// require all options to have negated options, but
// currently there are some which don't have that
if (options == null)
{
options = type.GetDefaultOptions();
}
if (extraOptions != null)
{
if (extraOptions.EndsWith(","))
{
options = extraOptions + options;
}
else
{
options = extraOptions + ',' + options;
}
}
switch (type)
{
case TokenizerAnnotator.TokenizerType.Arabic:
case TokenizerAnnotator.TokenizerType.Chinese:
{
factory = null;
break;
}
case TokenizerAnnotator.TokenizerType.Spanish:
{
factory = SpanishTokenizer.Factory(new CoreLabelTokenFactory(), options);
break;
}
case TokenizerAnnotator.TokenizerType.French:
{
factory = FrenchTokenizer.Factory(new CoreLabelTokenFactory(), options);
break;
}
case TokenizerAnnotator.TokenizerType.Whitespace:
{
bool eolIsSignificant = bool.ValueOf(props.GetProperty(EolProperty, "false"));
eolIsSignificant = eolIsSignificant || bool.ValueOf(props.GetProperty(StanfordCoreNLP.NewlineSplitterProperty, "false"));
factory = new WhitespaceTokenizer.WhitespaceTokenizerFactory <CoreLabel>(new CoreLabelTokenFactory(), eolIsSignificant);
break;
}
case TokenizerAnnotator.TokenizerType.English:
case TokenizerAnnotator.TokenizerType.German:
{
factory = PTBTokenizer.Factory(new CoreLabelTokenFactory(), options);
break;
}
case TokenizerAnnotator.TokenizerType.Unspecified:
{
log.Info("No tokenizer type provided. Defaulting to PTBTokenizer.");
factory = PTBTokenizer.Factory(new CoreLabelTokenFactory(), options);
break;
}
default:
{
throw new ArgumentException("No valid tokenizer type provided.\n" + "Use -tokenize.language, -tokenize.class, or -tokenize.whitespace \n" + "to specify a tokenizer.");
}
}
return(factory);
}
