code: /* LanguageTool, a natural language style checker
   * Copyright (C) 2014 Daniel Naber (http://www.danielnaber.de)
   *
   * 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;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.ResourceBundle;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  import org.languagetool.AnalyzedSentence;
  import org.languagetool.AnalyzedTokenReadings;
  import org.languagetool.Language;
  
  /**
   * An abstract rule that checks if there is a missing space before some conjunctions.
   *
   * @since 2.7
   */
  public abstract class AbstractSpaceBeforeRule extends Rule {
  
    protected abstract Pattern getConjunctions();
  
    public AbstractSpaceBeforeRule(ResourceBundle messages, Language language) {
      super.setCategory(Categories.MISC.getCategory(messages));
    }
  
    @Override
    public String getId() {
      return "SPACE_BEFORE_CONJUNCTION";
    }
  
    @Override
    public String getDescription() {
      return "Checks for missing space before some conjunctions";
    }
  
    protected String getShort() {
      return "Missing white space";
    }
  
    protected String getSuggestion() {
      return "Missing white space before conjunction";
    }
  
    @Override
    public final RuleMatch[] match(AnalyzedSentence sentence) {
      List<RuleMatch> ruleMatches = new ArrayList<>();
      AnalyzedTokenReadings[] tokens = sentence.getTokens();
  
      for (int i = 1; i < tokens.length; i++) {
        String token = tokens[i].getToken();
        Matcher matcher = getConjunctions().matcher(token);
        if (matcher.matches()) {
          String previousToken = tokens[i - 1].getToken();
          if (!(previousToken.equals(" ") || previousToken.equals("("))) {
            String replacement = " " + token;
            String msg = getSuggestion();
            int pos = tokens[i].getStartPos();
            RuleMatch potentialRuleMatch = new RuleMatch(this, sentence, pos, pos
                + token.length(), msg, getShort());
            potentialRuleMatch.setSuggestedReplacement(replacement);
            ruleMatches.add(potentialRuleMatch);
          }
        }
      }
      return toRuleMatchArray(ruleMatches);
    }
  
  }
  