Normalises token text to lower case, handling t-prothesis and n-eclipsis (i.e., that 'nAthair' should become 'n-athair')
Наследование: TokenFilter
Пример #1
0
        public virtual void TestIrishLowerCaseFilter_()
        {
            TokenStream          stream = new MockTokenizer(new StringReader("nAthair tUISCE hARD"), MockTokenizer.WHITESPACE, false);
            IrishLowerCaseFilter filter = new IrishLowerCaseFilter(stream);

            AssertTokenStreamContents(filter, new string[] { "n-athair", "t-uisce", "hard" });
        }
Пример #2
0
        /// <summary>
        /// Creates a
        /// <seealso cref="org.apache.lucene.analysis.Analyzer.TokenStreamComponents"/>
        /// which tokenizes all the text in the provided <seealso cref="Reader"/>.
        /// </summary>
        /// <returns> A
        ///         <seealso cref="org.apache.lucene.analysis.Analyzer.TokenStreamComponents"/>
        ///         built from an <seealso cref="StandardTokenizer"/> filtered with
        ///         <seealso cref="StandardFilter"/>, <seealso cref="IrishLowerCaseFilter"/>, <seealso cref="StopFilter"/>
        ///         , <seealso cref="SetKeywordMarkerFilter"/> if a stem exclusion set is
        ///         provided and <seealso cref="SnowballFilter"/>. </returns>
        public override TokenStreamComponents CreateComponents(string fieldName, TextReader reader)
        {
            Tokenizer   source = new StandardTokenizer(matchVersion, reader);
            TokenStream result = new StandardFilter(matchVersion, source);
            StopFilter  s      = new StopFilter(matchVersion, result, HYPHENATIONS);

            if (!matchVersion.OnOrAfter(LuceneVersion.LUCENE_44))
            {
                s.EnablePositionIncrements = false;
            }
            result = s;
            result = new ElisionFilter(result, DEFAULT_ARTICLES);
            result = new IrishLowerCaseFilter(result);
            result = new StopFilter(matchVersion, result, stopwords);
            if (stemExclusionSet.Count > 0)
            {
                result = new SetKeywordMarkerFilter(result, stemExclusionSet);
            }
            result = new SnowballFilter(result, new IrishStemmer());
            return(new TokenStreamComponents(source, result));
        }
Пример #3
0
 /// <summary>
 /// Creates a
 /// <seealso cref="org.apache.lucene.analysis.Analyzer.TokenStreamComponents"/>
 /// which tokenizes all the text in the provided <seealso cref="Reader"/>.
 /// </summary>
 /// <returns> A
 ///         <seealso cref="org.apache.lucene.analysis.Analyzer.TokenStreamComponents"/>
 ///         built from an <seealso cref="StandardTokenizer"/> filtered with
 ///         <seealso cref="StandardFilter"/>, <seealso cref="IrishLowerCaseFilter"/>, <seealso cref="StopFilter"/>
 ///         , <seealso cref="SetKeywordMarkerFilter"/> if a stem exclusion set is
 ///         provided and <seealso cref="SnowballFilter"/>. </returns>
 public override TokenStreamComponents CreateComponents(string fieldName, TextReader reader)
 {
     Tokenizer source = new StandardTokenizer(matchVersion, reader);
     TokenStream result = new StandardFilter(matchVersion, source);
     StopFilter s = new StopFilter(matchVersion, result, HYPHENATIONS);
     #pragma warning disable 612, 618
     if (!matchVersion.OnOrAfter(LuceneVersion.LUCENE_44))
     #pragma warning restore 612, 618
     {
         s.EnablePositionIncrements = false;
     }
     result = s;
     result = new ElisionFilter(result, DEFAULT_ARTICLES);
     result = new IrishLowerCaseFilter(result);
     result = new StopFilter(matchVersion, result, stopwords);
     if (stemExclusionSet.Count > 0)
     {
         result = new SetKeywordMarkerFilter(result, stemExclusionSet);
     }
     result = new SnowballFilter(result, new IrishStemmer());
     return new TokenStreamComponents(source, result);
 }
 public virtual void TestIrishLowerCaseFilter_()
 {
     TokenStream stream = new MockTokenizer(new StringReader("nAthair tUISCE hARD"), MockTokenizer.WHITESPACE, false);
     IrishLowerCaseFilter filter = new IrishLowerCaseFilter(stream);
     AssertTokenStreamContents(filter, new string[] { "n-athair", "t-uisce", "hard" });
 }