/*
    * Copyright (C) 2008 The Guava Authors
    *
    * Licensed 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.google.common.collect.testing;
  
  import com.google.common.annotations.GwtCompatible;
  
  import java.util.Collections;
  import java.util.List;
  import java.util.SortedSet;
  
  /**
   * Create string sets for testing collections that are sorted by natural
   * ordering.
   *
   * @author Jared Levy
   */
  @GwtCompatible
  public abstract class TestStringSortedSetGenerator
      extends TestStringSetGenerator implements TestSortedSetGenerator<String> {
  
    @Override
    public SortedSet<String> create(Object... elements) {
      return (SortedSet<String>) super.create(elements);
    }
  
    @Override protected abstract SortedSet<String> create(String[] elements);
  
    /** Sorts the elements by their natural ordering. */
    @Override public List<String> order(List<String> insertionOrder) {
      Collections.sort(insertionOrder);
      return insertionOrder;
    }
    
    @Override
    public String belowSamplesLesser() {
      return "!! a";
    }
  
    @Override
    public String belowSamplesGreater() {
      return "!! b";
    }
  
    @Override
    public String aboveSamplesLesser() {
      return "~~ a";
    }
  
    @Override
    public String aboveSamplesGreater() {
      return "~~ b";
    }
  }