code: /* LanguageTool, a natural language style checker 
   * Copyright (C) 2008 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 org.jetbrains.annotations.NotNull;
  
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.List;
  
  /**
   * A text, typically a sentence, that contains an error.
   * @since 0.9.2
   */
  public final class IncorrectExample extends ExampleSentence {
    
    private final Object corrections;
  
    public IncorrectExample(String example) {
      this(example, Collections.emptyList());
    }
  
    /**
     * @since 2.9
     */
    public IncorrectExample(String example, List<String> corrections) {
      super(example);
      this.corrections = corrections.isEmpty() ? null :
                         corrections.size() == 1 ? corrections.get(0) :
                         corrections.toArray(new String[0]);
    }
  
    /**
     * Return the possible corrections.
     */
    @NotNull
    public List<String> getCorrections() {
      return corrections == null ? Collections.emptyList() :
             corrections instanceof String ? Collections.singletonList((String) corrections) :
             Collections.unmodifiableList(Arrays.asList((String[])corrections));
    }
    
    @Override
    public String toString() {
      return example + " " + getCorrections();
    }
  
  }
  