lucene/analysis/common/src/test/org/apache/lucene/analysis/cjk/TestCJKAnalyzer.java - lucene-solr - Git at Google

 /*
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.
  * The ASF licenses this file to You under the Apache License, Version 2.0
  * (the "License"); you may not use this file except in compliance with
  * the License.  You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 package org.apache.lucene.analysis.cjk;


 import java.io.IOException;
 import java.io.Reader;

 import org.apache.lucene.analysis.Analyzer;
 import org.apache.lucene.analysis.BaseTokenStreamTestCase;
 import org.apache.lucene.analysis.CharArraySet;
 import org.apache.lucene.analysis.MockTokenizer;
 import org.apache.lucene.analysis.StopFilter;
 import org.apache.lucene.analysis.TokenFilter;
 import org.apache.lucene.analysis.TokenStream;
 import org.apache.lucene.analysis.Tokenizer;
 import org.apache.lucene.analysis.charfilter.MappingCharFilter;
 import org.apache.lucene.analysis.charfilter.NormalizeCharMap;
 import org.apache.lucene.analysis.core.KeywordTokenizer;
 import org.apache.lucene.analysis.standard.StandardTokenizer;
 import org.apache.lucene.analysis.tokenattributes.TypeAttribute;

 /**
  * Most tests adopted from TestCJKTokenizer
  */
 public class TestCJKAnalyzer extends BaseTokenStreamTestCase {
   private Analyzer analyzer;

   @Override
   public void setUp() throws Exception {
     super.setUp();
     analyzer = new CJKAnalyzer();
   }

   @Override
   public void tearDown() throws Exception {
     analyzer.close();
     super.tearDown();
   }

   public void testJa1() throws IOException {
     assertAnalyzesTo(analyzer, "一二三四五六七八九十",
       new String[] { "一二", "二三", "三四", "四五", "五六", "六七", "七八", "八九", "九十" },
       new int[] { 0, 1, 2, 3, 4, 5, 6, 7,  8 },
       new int[] { 2, 3, 4, 5, 6, 7, 8, 9, 10 },
       new String[] { "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>" },
       new int[] { 1, 1, 1, 1, 1, 1, 1, 1,  1 });
   }

   public void testJa2() throws IOException {
     assertAnalyzesTo(analyzer, "一 二三四 五六七八九 十",
       new String[] { "一", "二三", "三四", "五六", "六七", "七八", "八九", "十" },
       new int[] { 0, 2, 3, 6, 7,  8,  9, 12 },
       new int[] { 1, 4, 5, 8, 9, 10, 11, 13 },
       new String[] { "<SINGLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<SINGLE>" },
       new int[] { 1, 1, 1, 1, 1,  1,  1,  1 });
   }

   public void testC() throws IOException {
     assertAnalyzesTo(analyzer, "abc defgh ijklmn opqrstu vwxy z",
       new String[] { "abc", "defgh", "ijklmn", "opqrstu", "vwxy", "z" },
       new int[] { 0, 4, 10, 17, 25, 30 },
       new int[] { 3, 9, 16, 24, 29, 31 },
       new String[] { "<ALPHANUM>", "<ALPHANUM>", "<ALPHANUM>", "<ALPHANUM>", "<ALPHANUM>", "<ALPHANUM>" },
       new int[] { 1, 1,  1,  1,  1,  1 });
   }

   /**
    * LUCENE-2207: wrong offset calculated by end()
    */
   public void testFinalOffset() throws IOException {
     assertAnalyzesTo(analyzer, "あい",
       new String[] { "あい" },
       new int[] { 0 },
       new int[] { 2 },
       new String[] { "<DOUBLE>" },
       new int[] { 1 });

     assertAnalyzesTo(analyzer, "あい   ",
       new String[] { "あい" },
       new int[] { 0 },
       new int[] { 2 },
       new String[] { "<DOUBLE>" },
       new int[] { 1 });

     assertAnalyzesTo(analyzer, "test",
       new String[] { "test" },
       new int[] { 0 },
       new int[] { 4 },
       new String[] { "<ALPHANUM>" },
       new int[] { 1 });

     assertAnalyzesTo(analyzer, "test   ",
       new String[] { "test" },
       new int[] { 0 },
       new int[] { 4 },
       new String[] { "<ALPHANUM>" },
       new int[] { 1 });

     assertAnalyzesTo(analyzer, "あいtest",
       new String[] { "あい", "test" },
       new int[] { 0, 2 },
       new int[] { 2, 6 },
       new String[] { "<DOUBLE>", "<ALPHANUM>" },
       new int[] { 1, 1 });

     assertAnalyzesTo(analyzer, "testあい    ",
       new String[] { "test", "あい" },
       new int[] { 0, 4 },
       new int[] { 4, 6 },
       new String[] { "<ALPHANUM>", "<DOUBLE>" },
       new int[] { 1, 1 });
   }

   public void testMix() throws IOException {
     assertAnalyzesTo(analyzer, "あいうえおabcかきくけこ",
       new String[] { "あい", "いう", "うえ", "えお", "abc", "かき", "きく", "くけ", "けこ" },
       new int[] { 0, 1, 2, 3, 5,  8,  9, 10, 11 },
       new int[] { 2, 3, 4, 5, 8, 10, 11, 12, 13 },
       new String[] { "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<ALPHANUM>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>" },
       new int[] { 1, 1, 1, 1, 1,  1,  1,  1,  1});
   }

   public void testMix2() throws IOException {
     assertAnalyzesTo(analyzer, "あいうえおabんcかきくけ こ",
       new String[] { "あい", "いう", "うえ", "えお", "ab", "ん", "c", "かき", "きく", "くけ", "こ" },
       new int[] { 0, 1, 2, 3, 5, 7, 8,  9, 10, 11, 14 },
       new int[] { 2, 3, 4, 5, 7, 8, 9, 11, 12, 13, 15 },
       new String[] { "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<ALPHANUM>", "<SINGLE>", "<ALPHANUM>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<SINGLE>" },
       new int[] { 1, 1, 1, 1, 1, 1, 1,  1,  1,  1,  1 });
   }

   /**
    * Non-english text (outside of CJK) is treated normally, according to unicode rules
    */
   public void testNonIdeographic() throws IOException {
     assertAnalyzesTo(analyzer, "一 روبرت موير",
       new String[] { "一", "روبرت", "موير" },
       new int[] { 0, 2, 8 },
       new int[] { 1, 7, 12 },
       new String[] { "<SINGLE>", "<ALPHANUM>", "<ALPHANUM>" },
       new int[] { 1, 1, 1 });
   }

   /**
    * Same as the above, except with a nonspacing mark to show correctness.
    */
   public void testNonIdeographicNonLetter() throws IOException {
     assertAnalyzesTo(analyzer, "一 رُوبرت موير",
       new String[] { "一", "رُوبرت", "موير" },
       new int[] { 0, 2, 9 },
       new int[] { 1, 8, 13 },
       new String[] { "<SINGLE>", "<ALPHANUM>", "<ALPHANUM>" },
       new int[] { 1, 1, 1 });
   }

   public void testSurrogates() throws IOException {
     assertAnalyzesTo(analyzer, "𩬅艱鍟䇹愯瀛",
       new String[] { "𩬅艱", "艱鍟", "鍟䇹", "䇹愯", "愯瀛" },
       new int[] { 0, 2, 3, 4, 5 },
       new int[] { 3, 4, 5, 6, 7 },
       new String[] { "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>" },
       new int[] { 1, 1, 1, 1, 1 });
   }

   public void testReusableTokenStream() throws IOException {
     assertAnalyzesTo(analyzer, "あいうえおabcかきくけこ",
         new String[] { "あい", "いう", "うえ", "えお", "abc", "かき", "きく", "くけ", "けこ" },
         new int[] { 0, 1, 2, 3, 5,  8,  9, 10, 11 },
         new int[] { 2, 3, 4, 5, 8, 10, 11, 12, 13 },
         new String[] { "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<ALPHANUM>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>" },
         new int[] { 1, 1, 1, 1, 1,  1,  1,  1,  1});

     assertAnalyzesTo(analyzer, "あいうえおabんcかきくけ こ",
         new String[] { "あい", "いう", "うえ", "えお", "ab", "ん", "c", "かき", "きく", "くけ", "こ" },
         new int[] { 0, 1, 2, 3, 5, 7, 8,  9, 10, 11, 14 },
         new int[] { 2, 3, 4, 5, 7, 8, 9, 11, 12, 13, 15 },
         new String[] { "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<ALPHANUM>", "<SINGLE>", "<ALPHANUM>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<SINGLE>" },
         new int[] { 1, 1, 1, 1, 1, 1, 1,  1,  1,  1,  1 });
   }

   public void testSingleChar() throws IOException {
     assertAnalyzesTo(analyzer, "一",
       new String[] { "一" },
       new int[] { 0 },
       new int[] { 1 },
       new String[] { "<SINGLE>" },
       new int[] { 1 });
   }

   public void testTokenStream() throws IOException {
     assertAnalyzesTo(analyzer, "一丁丂",
       new String[] { "一丁", "丁丂"},
       new int[] { 0, 1 },
       new int[] { 2, 3 },
       new String[] { "<DOUBLE>", "<DOUBLE>" },
       new int[] { 1, 1 });
   }

   /** test that offsets are correct when mappingcharfilter is previously applied */
   public void testChangedOffsets() throws IOException {
     final NormalizeCharMap.Builder builder = new NormalizeCharMap.Builder();
     builder.add("a", "一二");
     builder.add("b", "二三");
     final NormalizeCharMap norm = builder.build();
     Analyzer analyzer = new Analyzer() {
       @Override
       protected TokenStreamComponents createComponents(String fieldName) {
         Tokenizer tokenizer = new StandardTokenizer();
         return new TokenStreamComponents(tokenizer, new CJKBigramFilter(tokenizer));
       }

       @Override
       protected Reader initReader(String fieldName, Reader reader) {
         return new MappingCharFilter(norm, reader);
       }
     };

     assertAnalyzesTo(analyzer, "ab",
         new String[] { "一二", "二二", "二三" },
         new int[] { 0, 0, 1 },
         new int[] { 1, 1, 2 });

     // note: offsets are strange since this is how the charfilter maps them...
     // before bigramming, the 4 tokens look like:
     //   { 0, 0, 1, 1 },
     //   { 0, 1, 1, 2 }

     analyzer.close();
   }

   private static class FakeStandardTokenizer extends TokenFilter {
     final TypeAttribute typeAtt = addAttribute(TypeAttribute.class);

     public FakeStandardTokenizer(TokenStream input) {
       super(input);
     }

     @Override
     public boolean incrementToken() throws IOException {
       if (input.incrementToken()) {
         typeAtt.setType(StandardTokenizer.TOKEN_TYPES[StandardTokenizer.IDEOGRAPHIC]);
         return true;
       } else {
         return false;
       }
     }
   }

   public void testSingleChar2() throws Exception {
     Analyzer analyzer = new Analyzer() {

       @Override
       protected TokenStreamComponents createComponents(String fieldName) {
         Tokenizer tokenizer = new MockTokenizer(MockTokenizer.WHITESPACE, false);
         TokenFilter filter = new FakeStandardTokenizer(tokenizer);
         filter = new StopFilter(filter, CharArraySet.EMPTY_SET);
         filter = new CJKBigramFilter(filter);
         return new TokenStreamComponents(tokenizer, filter);
       }
     };

     assertAnalyzesTo(analyzer, "一",
         new String[] { "一" },
         new int[] { 0 },
         new int[] { 1 },
         new String[] { "<SINGLE>" },
         new int[] { 1 });
     analyzer.close();
   }

   /** blast some random strings through the analyzer */
   public void testRandomStrings() throws Exception {
     Analyzer a = new CJKAnalyzer();
     checkRandomData(random(), a, 200 * RANDOM_MULTIPLIER);
     a.close();
   }

   /** blast some random strings through the analyzer */
   public void testRandomHugeStrings() throws Exception {
     Analyzer a = new CJKAnalyzer();
     checkRandomData(random(), a, 10 * RANDOM_MULTIPLIER, 8192);
     a.close();
   }

   public void testEmptyTerm() throws IOException {
     Analyzer a = new Analyzer() {
       @Override
       protected TokenStreamComponents createComponents(String fieldName) {
         Tokenizer tokenizer = new KeywordTokenizer();
         return new TokenStreamComponents(tokenizer, new CJKBigramFilter(tokenizer));
       }
     };
     checkOneTerm(a, "", "");
     a.close();
   }
 }
	/*
	* Licensed to the Apache Software Foundation (ASF) under one or more
	* contributor license agreements. See the NOTICE file distributed with
	* this work for additional information regarding copyright ownership.
	* The ASF licenses this file to You under the Apache License, Version 2.0
	* (the "License"); you may not use this file except in compliance with
	* the License. You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/
	package org.apache.lucene.analysis.cjk;


	import java.io.IOException;
	import java.io.Reader;

	import org.apache.lucene.analysis.Analyzer;
	import org.apache.lucene.analysis.BaseTokenStreamTestCase;
	import org.apache.lucene.analysis.CharArraySet;
	import org.apache.lucene.analysis.MockTokenizer;
	import org.apache.lucene.analysis.StopFilter;
	import org.apache.lucene.analysis.TokenFilter;
	import org.apache.lucene.analysis.TokenStream;
	import org.apache.lucene.analysis.Tokenizer;
	import org.apache.lucene.analysis.charfilter.MappingCharFilter;
	import org.apache.lucene.analysis.charfilter.NormalizeCharMap;
	import org.apache.lucene.analysis.core.KeywordTokenizer;
	import org.apache.lucene.analysis.standard.StandardTokenizer;
	import org.apache.lucene.analysis.tokenattributes.TypeAttribute;

	/**
	* Most tests adopted from TestCJKTokenizer
	*/
	public class TestCJKAnalyzer extends BaseTokenStreamTestCase {
	private Analyzer analyzer;

	@Override
	public void setUp() throws Exception {
	super.setUp();
	analyzer = new CJKAnalyzer();
	}

	@Override
	public void tearDown() throws Exception {
	analyzer.close();
	super.tearDown();
	}

	public void testJa1() throws IOException {
	assertAnalyzesTo(analyzer, "一二三四五六七八九十",
	new String[] { "一二", "二三", "三四", "四五", "五六", "六七", "七八", "八九", "九十" },
	new int[] { 0, 1, 2, 3, 4, 5, 6, 7, 8 },
	new int[] { 2, 3, 4, 5, 6, 7, 8, 9, 10 },
	new String[] { "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>" },
	new int[] { 1, 1, 1, 1, 1, 1, 1, 1, 1 });
	}

	public void testJa2() throws IOException {
	assertAnalyzesTo(analyzer, "一二三四五六七八九十",
	new String[] { "一", "二三", "三四", "五六", "六七", "七八", "八九", "十" },
	new int[] { 0, 2, 3, 6, 7, 8, 9, 12 },
	new int[] { 1, 4, 5, 8, 9, 10, 11, 13 },
	new String[] { "<SINGLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<SINGLE>" },
	new int[] { 1, 1, 1, 1, 1, 1, 1, 1 });
	}

	public void testC() throws IOException {
	assertAnalyzesTo(analyzer, "abc defgh ijklmn opqrstu vwxy z",
	new String[] { "abc", "defgh", "ijklmn", "opqrstu", "vwxy", "z" },
	new int[] { 0, 4, 10, 17, 25, 30 },
	new int[] { 3, 9, 16, 24, 29, 31 },
	new String[] { "<ALPHANUM>", "<ALPHANUM>", "<ALPHANUM>", "<ALPHANUM>", "<ALPHANUM>", "<ALPHANUM>" },
	new int[] { 1, 1, 1, 1, 1, 1 });
	}

	/**
	* LUCENE-2207: wrong offset calculated by end()
	*/
	public void testFinalOffset() throws IOException {
	assertAnalyzesTo(analyzer, "あい",
	new String[] { "あい" },
	new int[] { 0 },
	new int[] { 2 },
	new String[] { "<DOUBLE>" },
	new int[] { 1 });

	assertAnalyzesTo(analyzer, "あい ",
	new String[] { "あい" },
	new int[] { 0 },
	new int[] { 2 },
	new String[] { "<DOUBLE>" },
	new int[] { 1 });

	assertAnalyzesTo(analyzer, "test",
	new String[] { "test" },
	new int[] { 0 },
	new int[] { 4 },
	new String[] { "<ALPHANUM>" },
	new int[] { 1 });

	assertAnalyzesTo(analyzer, "test ",
	new String[] { "test" },
	new int[] { 0 },
	new int[] { 4 },
	new String[] { "<ALPHANUM>" },
	new int[] { 1 });

	assertAnalyzesTo(analyzer, "あいtest",
	new String[] { "あい", "test" },
	new int[] { 0, 2 },
	new int[] { 2, 6 },
	new String[] { "<DOUBLE>", "<ALPHANUM>" },
	new int[] { 1, 1 });

	assertAnalyzesTo(analyzer, "testあい ",
	new String[] { "test", "あい" },
	new int[] { 0, 4 },
	new int[] { 4, 6 },
	new String[] { "<ALPHANUM>", "<DOUBLE>" },
	new int[] { 1, 1 });
	}

	public void testMix() throws IOException {
	assertAnalyzesTo(analyzer, "あいうえおabcかきくけこ",
	new String[] { "あい", "いう", "うえ", "えお", "abc", "かき", "きく", "くけ", "けこ" },
	new int[] { 0, 1, 2, 3, 5, 8, 9, 10, 11 },
	new int[] { 2, 3, 4, 5, 8, 10, 11, 12, 13 },
	new String[] { "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<ALPHANUM>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>" },
	new int[] { 1, 1, 1, 1, 1, 1, 1, 1, 1});
	}

	public void testMix2() throws IOException {
	assertAnalyzesTo(analyzer, "あいうえおabんcかきくけこ",
	new String[] { "あい", "いう", "うえ", "えお", "ab", "ん", "c", "かき", "きく", "くけ", "こ" },
	new int[] { 0, 1, 2, 3, 5, 7, 8, 9, 10, 11, 14 },
	new int[] { 2, 3, 4, 5, 7, 8, 9, 11, 12, 13, 15 },
	new String[] { "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<ALPHANUM>", "<SINGLE>", "<ALPHANUM>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<SINGLE>" },
	new int[] { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 });
	}

	/**
	* Non-english text (outside of CJK) is treated normally, according to unicode rules
	*/
	public void testNonIdeographic() throws IOException {
	assertAnalyzesTo(analyzer, "一 روبرت موير",
	new String[] { "一", "روبرت", "موير" },
	new int[] { 0, 2, 8 },
	new int[] { 1, 7, 12 },
	new String[] { "<SINGLE>", "<ALPHANUM>", "<ALPHANUM>" },
	new int[] { 1, 1, 1 });
	}

	/**
	* Same as the above, except with a nonspacing mark to show correctness.
	*/
	public void testNonIdeographicNonLetter() throws IOException {
	assertAnalyzesTo(analyzer, "一 رُوبرت موير",
	new String[] { "一", "رُوبرت", "موير" },
	new int[] { 0, 2, 9 },
	new int[] { 1, 8, 13 },
	new String[] { "<SINGLE>", "<ALPHANUM>", "<ALPHANUM>" },
	new int[] { 1, 1, 1 });
	}

	public void testSurrogates() throws IOException {
	assertAnalyzesTo(analyzer, "𩬅艱鍟䇹愯瀛",
	new String[] { "𩬅艱", "艱鍟", "鍟䇹", "䇹愯", "愯瀛" },
	new int[] { 0, 2, 3, 4, 5 },
	new int[] { 3, 4, 5, 6, 7 },
	new String[] { "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>" },
	new int[] { 1, 1, 1, 1, 1 });
	}

	public void testReusableTokenStream() throws IOException {
	assertAnalyzesTo(analyzer, "あいうえおabcかきくけこ",
	new String[] { "あい", "いう", "うえ", "えお", "abc", "かき", "きく", "くけ", "けこ" },
	new int[] { 0, 1, 2, 3, 5, 8, 9, 10, 11 },
	new int[] { 2, 3, 4, 5, 8, 10, 11, 12, 13 },
	new String[] { "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<ALPHANUM>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>" },
	new int[] { 1, 1, 1, 1, 1, 1, 1, 1, 1});

	assertAnalyzesTo(analyzer, "あいうえおabんcかきくけこ",
	new String[] { "あい", "いう", "うえ", "えお", "ab", "ん", "c", "かき", "きく", "くけ", "こ" },
	new int[] { 0, 1, 2, 3, 5, 7, 8, 9, 10, 11, 14 },
	new int[] { 2, 3, 4, 5, 7, 8, 9, 11, 12, 13, 15 },
	new String[] { "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<ALPHANUM>", "<SINGLE>", "<ALPHANUM>", "<DOUBLE>", "<DOUBLE>", "<DOUBLE>", "<SINGLE>" },
	new int[] { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 });
	}

	public void testSingleChar() throws IOException {
	assertAnalyzesTo(analyzer, "一",
	new String[] { "一" },
	new int[] { 0 },
	new int[] { 1 },
	new String[] { "<SINGLE>" },
	new int[] { 1 });
	}

	public void testTokenStream() throws IOException {
	assertAnalyzesTo(analyzer, "一丁丂",
	new String[] { "一丁", "丁丂"},
	new int[] { 0, 1 },
	new int[] { 2, 3 },
	new String[] { "<DOUBLE>", "<DOUBLE>" },
	new int[] { 1, 1 });
	}

	/** test that offsets are correct when mappingcharfilter is previously applied */
	public void testChangedOffsets() throws IOException {
	final NormalizeCharMap.Builder builder = new NormalizeCharMap.Builder();
	builder.add("a", "一二");
	builder.add("b", "二三");
	final NormalizeCharMap norm = builder.build();
	Analyzer analyzer = new Analyzer() {
	@Override
	protected TokenStreamComponents createComponents(String fieldName) {
	Tokenizer tokenizer = new StandardTokenizer();
	return new TokenStreamComponents(tokenizer, new CJKBigramFilter(tokenizer));
	}

	@Override
	protected Reader initReader(String fieldName, Reader reader) {
	return new MappingCharFilter(norm, reader);
	}
	};

	assertAnalyzesTo(analyzer, "ab",
	new String[] { "一二", "二二", "二三" },
	new int[] { 0, 0, 1 },
	new int[] { 1, 1, 2 });

	// note: offsets are strange since this is how the charfilter maps them...
	// before bigramming, the 4 tokens look like:
	// { 0, 0, 1, 1 },
	// { 0, 1, 1, 2 }

	analyzer.close();
	}

	private static class FakeStandardTokenizer extends TokenFilter {
	final TypeAttribute typeAtt = addAttribute(TypeAttribute.class);

	public FakeStandardTokenizer(TokenStream input) {
	super(input);
	}

	@Override
	public boolean incrementToken() throws IOException {
	if (input.incrementToken()) {
	typeAtt.setType(StandardTokenizer.TOKEN_TYPES[StandardTokenizer.IDEOGRAPHIC]);
	return true;
	} else {
	return false;
	}
	}
	}

	public void testSingleChar2() throws Exception {
	Analyzer analyzer = new Analyzer() {

	@Override
	protected TokenStreamComponents createComponents(String fieldName) {
	Tokenizer tokenizer = new MockTokenizer(MockTokenizer.WHITESPACE, false);
	TokenFilter filter = new FakeStandardTokenizer(tokenizer);
	filter = new StopFilter(filter, CharArraySet.EMPTY_SET);
	filter = new CJKBigramFilter(filter);
	return new TokenStreamComponents(tokenizer, filter);
	}
	};

	assertAnalyzesTo(analyzer, "一",
	new String[] { "一" },
	new int[] { 0 },
	new int[] { 1 },
	new String[] { "<SINGLE>" },
	new int[] { 1 });
	analyzer.close();
	}

	/** blast some random strings through the analyzer */
	public void testRandomStrings() throws Exception {
	Analyzer a = new CJKAnalyzer();
	checkRandomData(random(), a, 200 * RANDOM_MULTIPLIER);
	a.close();
	}

	/** blast some random strings through the analyzer */
	public void testRandomHugeStrings() throws Exception {
	Analyzer a = new CJKAnalyzer();
	checkRandomData(random(), a, 10 * RANDOM_MULTIPLIER, 8192);
	a.close();
	}

	public void testEmptyTerm() throws IOException {
	Analyzer a = new Analyzer() {
	@Override
	protected TokenStreamComponents createComponents(String fieldName) {
	Tokenizer tokenizer = new KeywordTokenizer();
	return new TokenStreamComponents(tokenizer, new CJKBigramFilter(tokenizer));
	}
	};
	checkOneTerm(a, "", "");
	a.close();
	}
	}