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 com.google.common.annotations.GwtCompatible;
020import com.google.common.collect.testing.SampleElements.Enums;
021import java.util.Collections;
022import java.util.List;
023import java.util.Set;
024
025/**
026 * An abstract TestSetGenerator for generating sets containing enum values.
027 *
028 * @author Kevin Bourrillion
029 */
030@GwtCompatible
031@ElementTypesAreNonnullByDefault
032public abstract class TestEnumSetGenerator implements TestSetGenerator<AnEnum> {
033  @Override
034  public SampleElements<AnEnum> samples() {
035    return new Enums();
036  }
037
038  @Override
039  public Set<AnEnum> create(Object... elements) {
040    AnEnum[] array = new AnEnum[elements.length];
041    int i = 0;
042    for (Object e : elements) {
043      array[i++] = (AnEnum) e;
044    }
045    return create(array);
046  }
047
048  protected abstract Set<AnEnum> create(AnEnum[] elements);
049
050  @Override
051  public AnEnum[] createArray(int length) {
052    return new AnEnum[length];
053  }
054
055  /** Sorts the enums according to their natural ordering. */
056  @Override
057  public List<AnEnum> order(List<AnEnum> insertionOrder) {
058    Collections.sort(insertionOrder);
059    return insertionOrder;
060  }
061}