code: /* LanguageTool, a natural language style checker
   * Copyright (C) 2015 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.de;
  
  import gnu.trove.THashSet;
  import org.apache.commons.lang3.StringUtils;
  import org.languagetool.JLanguageTool;
  import org.languagetool.rules.patterns.StringMatcher;
  
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Set;
  
  /**
   * @since 3.0
   */
  final class CaseRuleExceptions {
  
    private static final Set<String> exceptions = loadExceptions(
      "/de/eigennamen_gross.txt",  // Premium
      "/de/case_rule_exceptions.txt"
    );
  
    private CaseRuleExceptions() {
    }
  
    public static Set<String> getExceptions() {
      return exceptions;
    }
  
    public static Set<StringMatcher[]> getExceptionPatterns() {
      THashSet<StringMatcher[]> exceptionPatterns = new THashSet<>(250);
      for (String phrase : exceptions) {
        String[] parts = StringUtils.split(phrase, ' ');
        StringMatcher[] patterns = new StringMatcher[parts.length];
        for (int j = 0; j < parts.length; j++) {
          patterns[j] = StringMatcher.regexp(parts[j]);
        }
        exceptionPatterns.add(patterns);
      }
      exceptionPatterns.trimToSize();
      return Collections.unmodifiableSet(exceptionPatterns);
    }
  
    private static Set<String> loadExceptions(String... paths) {
      Set<String> result = new HashSet<>();
      for (String path : paths) {
        List<String> lines = JLanguageTool.getDataBroker().getFromResourceDirAsLines(path);
        for (String line : lines) {
          if (line.isEmpty() || line.startsWith("#")) {
            continue;
          }
          if (Character.isWhitespace(line.charAt(0)) || Character.isWhitespace(line.charAt(line.length()-1))) {
            throw new IllegalArgumentException("Invalid line in " + path + ", starts or ends with whitespace: '" + line + "'");
          }
          result.add(line);
        }
      }
      return Collections.unmodifiableSet(result);
    }
  
  }
  