package org.apache.lucene.analysis.ja;

/*
 * 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.
 */

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.TokenStream;
import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.analysis.core.KeywordTokenizer;
import org.apache.lucene.analysis.miscellaneous.SetKeywordMarkerFilter;
import org.apache.lucene.analysis.util.CharArraySet;

public class TestJapaneseBaseFormFilter extends BaseTokenStreamTestCase {
  private Analyzer analyzer = new Analyzer() {
    @Override
    protected TokenStreamComponents createComponents(String fieldName, Reader reader) {
      Tokenizer tokenizer = new JapaneseTokenizer(reader, null, true, JapaneseTokenizer.DEFAULT_MODE);
      return new TokenStreamComponents(tokenizer, new JapaneseBaseFormFilter(tokenizer));
    }
  };
  
  public void testBasics() throws IOException {
    assertAnalyzesTo(analyzer, "それはまだ実験段階にあります",
        new String[] { "それ", "は", "まだ", "実験", "段階", "に", "ある", "ます"  }
    );
  }
  
  public void testKeyword() throws IOException {
    final CharArraySet exclusionSet = new CharArraySet(TEST_VERSION_CURRENT, asSet("あり"), false);
    Analyzer a = new Analyzer() {
      @Override
      protected TokenStreamComponents createComponents(String fieldName, Reader reader) {
        Tokenizer source = new JapaneseTokenizer(reader, null, true, JapaneseTokenizer.DEFAULT_MODE);
        TokenStream sink = new SetKeywordMarkerFilter(source, exclusionSet);
        return new TokenStreamComponents(source, new JapaneseBaseFormFilter(sink));
      }
    };
    assertAnalyzesTo(a, "それはまだ実験段階にあります",
        new String[] { "それ", "は", "まだ", "実験", "段階", "に", "あり", "ます"  }
    );
  }
  
  public void testEnglish() throws IOException {
    assertAnalyzesTo(analyzer, "this atest",
        new String[] { "this", "atest" });
  }
  
  public void testRandomStrings() throws IOException {
    checkRandomData(random(), analyzer, atLeast(1000));
  }
  
  public void testEmptyTerm() throws IOException {
    Analyzer a = new Analyzer() {
      @Override
      protected TokenStreamComponents createComponents(String fieldName, Reader reader) {
        Tokenizer tokenizer = new KeywordTokenizer(reader);
        return new TokenStreamComponents(tokenizer, new JapaneseBaseFormFilter(tokenizer));
      }
    };
    checkOneTerm(a, "", "");
  }
}
