1   /*
2    * Copyright (C) 2007 The Guava Authors
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    * http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package com.google.common.collect.testing;
18  
19  import com.google.common.annotations.GwtCompatible;
20  import com.google.common.collect.testing.SampleElements.Ints;
21  
22  import java.util.List;
23  import java.util.Set;
24  
25  /**
26   * Create integer sets for collection tests.
27   *
28   * @author Gregory Kick
29   */
30  @GwtCompatible
31  public abstract class TestIntegerSetGenerator implements TestSetGenerator<Integer> {
32    @Override public SampleElements<Integer> samples() {
33      return new Ints();
34    }
35  
36    @Override public Set<Integer> create(Object... elements) {
37      Integer[] array = new Integer[elements.length];
38      int i = 0;
39      for (Object e : elements) {
40        array[i++] = (Integer) e;
41      }
42      return create(array);
43    }
44  
45    protected abstract Set<Integer> create(Integer[] elements);
46  
47    @Override public Integer[] createArray(int length) {
48      return new Integer[length];
49    }
50  
51    /**
52     * {@inheritDoc}
53     *
54     * <p>By default, returns the supplied elements in their given order; however,
55     * generators for containers with a known order other than insertion order
56     * must override this method.
57     *
58     * <p>Note: This default implementation is overkill (but valid) for an
59     * unordered container. An equally valid implementation for an unordered
60     * container is to throw an exception. The chosen implementation, however, has
61     * the advantage of working for insertion-ordered containers, as well.
62     */
63    @Override public List<Integer> order(List<Integer> insertionOrder) {
64      return insertionOrder;
65    }
66  }