/*
    * Copyright (C) 2007 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 com.google.common.collect.testing.SampleElements.Enums;
  
  import java.util.Collections;
  import java.util.List;
  import java.util.Set;
  
  /**
   * An abstract TestSetGenerator for generating sets containing enum values.
   *
   * @author Kevin Bourrillion
   */
  @GwtCompatible
  public abstract class TestEnumSetGenerator implements TestSetGenerator<AnEnum> {
    @Override
    public SampleElements<AnEnum> samples() {
      return new Enums();
    }
  
    @Override
    public Set<AnEnum> create(Object... elements) {
      AnEnum[] array = new AnEnum[elements.length];
      int i = 0;
      for (Object e : elements) {
        array[i++] = (AnEnum) e;
      }
      return create(array);
    }
  
    protected abstract Set<AnEnum> create(AnEnum[] elements);
  
    @Override
    public AnEnum[] createArray(int length) {
      return new AnEnum[length];
    }
  
    /**
     * Sorts the enums according to their natural ordering.
     */
    @Override
    public List<AnEnum> order(List<AnEnum> insertionOrder) {
      Collections.sort(insertionOrder);
      return insertionOrder;
    }
  }