code: /**
   * boilerpipe
   *
   * Copyright (c) 2009, 2014 Christian Kohlschütter
   *
   * The author 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 com.kohlschutter.boilerpipe.extractors;
  
  import com.kohlschutter.boilerpipe.BoilerpipeProcessingException;
  import com.kohlschutter.boilerpipe.document.TextDocument;
  import com.kohlschutter.boilerpipe.filters.english.IgnoreBlocksAfterContentFilter;
  import com.kohlschutter.boilerpipe.filters.english.NumWordsRulesClassifier;
  import com.kohlschutter.boilerpipe.filters.english.TerminatingBlocksFinder;
  import com.kohlschutter.boilerpipe.filters.heuristics.BlockProximityFusion;
  import com.kohlschutter.boilerpipe.filters.heuristics.DocumentTitleMatchClassifier;
  import com.kohlschutter.boilerpipe.filters.heuristics.ExpandTitleToContentFilter;
  import com.kohlschutter.boilerpipe.filters.heuristics.KeepLargestBlockFilter;
  import com.kohlschutter.boilerpipe.filters.heuristics.LargeBlockSameTagLevelToContentFilter;
  import com.kohlschutter.boilerpipe.filters.heuristics.ListAtEndFilter;
  import com.kohlschutter.boilerpipe.filters.heuristics.TrailingHeadlineToBoilerplateFilter;
  import com.kohlschutter.boilerpipe.filters.simple.BoilerplateBlockFilter;
  
  /**
   * A full-text extractor which is tuned towards news articles. In this scenario it achieves higher
   * accuracy than {@link DefaultExtractor}.
   */
  public final class ArticleExtractor extends ExtractorBase {
    public static final ArticleExtractor INSTANCE = new ArticleExtractor();
  
    /**
     * Returns the singleton instance for {@link ArticleExtractor}.
     */
    public static ArticleExtractor getInstance() {
      return INSTANCE;
    }
  
    public boolean process(TextDocument doc) throws BoilerpipeProcessingException {
      return
  
      TerminatingBlocksFinder.INSTANCE.process(doc)
          | new DocumentTitleMatchClassifier(doc.getTitle()).process(doc)
          | NumWordsRulesClassifier.INSTANCE.process(doc)
          | IgnoreBlocksAfterContentFilter.DEFAULT_INSTANCE.process(doc)
          | TrailingHeadlineToBoilerplateFilter.INSTANCE.process(doc)
          | BlockProximityFusion.MAX_DISTANCE_1.process(doc)
          | BoilerplateBlockFilter.INSTANCE_KEEP_TITLE.process(doc)
          | BlockProximityFusion.MAX_DISTANCE_1_CONTENT_ONLY_SAME_TAGLEVEL.process(doc)
          | KeepLargestBlockFilter.INSTANCE_EXPAND_TO_SAME_TAGLEVEL_MIN_WORDS.process(doc)
          | ExpandTitleToContentFilter.INSTANCE.process(doc)
          | LargeBlockSameTagLevelToContentFilter.INSTANCE.process(doc)
          | ListAtEndFilter.INSTANCE.process(doc);
    }
  }
  