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.base;
18  
19  import com.google.common.annotations.GwtCompatible;
20  
21  /**
22   * A class that can supply objects of a single type.  Semantically, this could
23   * be a factory, generator, builder, closure, or something else entirely. No
24   * guarantees are implied by this interface.
25   *
26   * @author Harry Heymann
27   * @since 2.0 (imported from Google Collections Library)
28   */
29  @GwtCompatible
30  public interface Supplier<T> {
31    /**
32     * Retrieves an instance of the appropriate type. The returned object may or
33     * may not be a new instance, depending on the implementation.
34     *
35     * @return an instance of the appropriate type
36     */
37    T get();
38  }