code: /* LanguageTool, a natural language style checker
   * Copyright (C) 2016 Marcin Miłkowski (http://www.languagetool.org)
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
   * USA
   */
  
  package org.languagetool.rules.en;
  
  import com.hankcs.algorithm.AhoCorasickDoubleArrayTrie;
  import org.languagetool.rules.AbstractDashRule;
  import org.languagetool.rules.Example;
  import org.languagetool.tools.Tools;
  
  import java.util.ResourceBundle;
  
  /**
   * Check for compounds written with dashes instead of hyphens.
   * @since 3.8
   */
  public class EnglishDashRule extends AbstractDashRule {
  
    private static volatile AhoCorasickDoubleArrayTrie<String> trie;
  
    public EnglishDashRule(ResourceBundle messages) {
      super(messages);
      addExamplePair(Example.wrong("I'll buy a new <marker>T—shirt</marker>."),
                     Example.fixed("I'll buy a new <marker>T-shirt</marker>."));
      setUrl(Tools.getUrl("https://languagetool.org/insights/post/hyphen/"));
    }
  
    @Override
    public String getId() {
      return "EN_DASH_RULE";
    }
  
    @Override
    public String getDescription() {
      return "Checks if hyphenated words were spelled with dashes (e.g., 'T — shirt' instead 'T-shirt').";
    }
  
    @Override
    public String getMessage() {
      return "A dash was used instead of a hyphen.";
    }
  
    @Override
    protected AhoCorasickDoubleArrayTrie<String> getCompoundsData() {
      AhoCorasickDoubleArrayTrie<String> data = trie;
      if (data == null) {
        synchronized (EnglishDashRule.class) {
          data = trie;
          if (data == null) {
            trie = data = loadCompoundFile("/en/compounds.txt");
          }
        }
      }
  
      return data;
    }
  }
  