001/*
002 * Copyright (C) 2007 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.google.common.collect.testing;
018
019import static java.util.Collections.sort;
020
021import com.google.common.annotations.GwtCompatible;
022import com.google.common.collect.testing.SampleElements.Enums;
023import java.util.List;
024import java.util.Set;
025
026/**
027 * An abstract TestSetGenerator for generating sets containing enum values.
028 *
029 * @author Kevin Bourrillion
030 */
031@GwtCompatible
032@ElementTypesAreNonnullByDefault
033public abstract class TestEnumSetGenerator implements TestSetGenerator<AnEnum> {
034  @Override
035  public SampleElements<AnEnum> samples() {
036    return new Enums();
037  }
038
039  @Override
040  public Set<AnEnum> create(Object... elements) {
041    AnEnum[] array = new AnEnum[elements.length];
042    int i = 0;
043    for (Object e : elements) {
044      array[i++] = (AnEnum) e;
045    }
046    return create(array);
047  }
048
049  protected abstract Set<AnEnum> create(AnEnum[] elements);
050
051  @Override
052  public AnEnum[] createArray(int length) {
053    return new AnEnum[length];
054  }
055
056  /** Sorts the enums according to their natural ordering. */
057  @Override
058  public List<AnEnum> order(List<AnEnum> insertionOrder) {
059    sort(insertionOrder);
060    return insertionOrder;
061  }
062}