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1   /*
2    * Copyright (C) 2012 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  
21  /**
22   * A generator that relies on a preexisting generator for most of its work. For example, a derived
23   * iterator generator may delegate the work of creating the underlying collection to an inner
24   * collection generator.
25   *
26   * <p>{@code GwtTestSuiteGenerator} expects every {@code DerivedIterator} implementation to provide
27   * a one-arg constructor accepting its inner generator as an argument). This requirement enables it
28   * to generate source code (since GWT cannot use reflection to generate the suites).
29   *
30   * @author Chris Povirk
31   */
32  @GwtCompatible
33  public interface DerivedGenerator {
34    TestSubjectGenerator<?> getInnerGenerator();
35  }