1 /*
2 * Copyright 2012-2013 smartics, Kronseder & Reiner GmbH
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 package de.smartics.properties.spi.config.cache;
17
18 import java.util.Set;
19
20 /**
21 * The cache interface for all caches for smartics properties. It adds the
22 * awareness for its size and its keys.
23 *
24 * @param <K> the type variable for the key.
25 * @param <V> the type variablefor the value.
26 */
27 public interface Cache<K, V> extends UnawareCache<K, V>
28 {
29
30 // ********************************* Fields *********************************
31
32 // --- constants ------------------------------------------------------------
33
34 // ****************************** Initializer *******************************
35
36 // ****************************** Inner Classes *****************************
37
38 // ********************************* Methods ********************************
39
40 /**
41 * Fetch the size of the cache.
42 *
43 * @return the number of elements in the cache.
44 */
45 long size();
46
47 /**
48 * Returns a set of all keys in the cache.
49 *
50 * @return the set of all keys.
51 */
52 Set<K> keySet();
53
54 // --- get&set --------------------------------------------------------------
55
56 // --- business -------------------------------------------------------------
57
58 // --- object basics --------------------------------------------------------
59 }