Supplier.java revision 1d580d0f6ee4f21eb309ba7b509d2c6d671c4044 
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
17package com.google.common.base;
18
19import 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
30public 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}
39