1 /*
2 * This file is part of the Heritrix web crawler (crawler.archive.org).
3 *
4 * Licensed to the Internet Archive (IA) by one or more individual
5 * contributors.
6 *
7 * The IA licenses this file to You under the Apache License, Version 2.0
8 * (the "License"); you may not use this file except in compliance with
9 * the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 */
19 package org.archive.util;
20
21 /***
22 * Class for optionally providing one instance of the parameterized
23 * type. The one instance may be provided at construction, or by
24 * overriding get() in subclasses, may be created on demand.
25 *
26 * @param <V>
27 */
28 public class Supplier<V> {
29 V instance;
30
31 public Supplier() {
32 super();
33 }
34
35 public Supplier(V instance) {
36 super();
37 this.instance = instance;
38 }
39
40 public V get() {
41 return instance;
42 }
43 }