Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
LRUCache |
|
| 0.0;0 |
1 | /** |
|
2 | * |
|
3 | * Licensed to the Apache Software Foundation (ASF) under one or more |
|
4 | * contributor license agreements. See the NOTICE file distributed with |
|
5 | * this work for additional information regarding copyright ownership. |
|
6 | * The ASF licenses this file to You under the Apache License, Version 2.0 |
|
7 | * (the "License"); you may not use this file except in compliance with |
|
8 | * the License. You may obtain a copy of the License at |
|
9 | * |
|
10 | * http://www.apache.org/licenses/LICENSE-2.0 |
|
11 | * |
|
12 | * Unless required by applicable law or agreed to in writing, software |
|
13 | * distributed under the License is distributed on an "AS IS" BASIS, |
|
14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
|
15 | * See the License for the specific language governing permissions and |
|
16 | * limitations under the License. |
|
17 | */ |
|
18 | package org.apache.camel.util; |
|
19 | ||
20 | import java.util.LinkedHashMap; |
|
21 | import java.util.Map; |
|
22 | ||
23 | /** |
|
24 | * A Least Recently Used Cache |
|
25 | * |
|
26 | * @version $Revision: 1.1 $ |
|
27 | */ |
|
28 | public class LRUCache<K, V> extends LinkedHashMap<K, V> { |
|
29 | private static final long serialVersionUID = -342098639681884413L; |
|
30 | 2 | private int maxCacheSize = 10000; |
31 | ||
32 | public LRUCache(int maximumCacheSize) { |
|
33 | 2 | this(maximumCacheSize, maximumCacheSize, 0.75f, true); |
34 | 2 | } |
35 | ||
36 | /** |
|
37 | * Constructs an empty <tt>LRUCache</tt> instance with the |
|
38 | * specified initial capacity, maximumCacheSize,load factor and ordering mode. |
|
39 | * |
|
40 | * @param initialCapacity the initial capacity. |
|
41 | * @param maximumCacheSize |
|
42 | * @param loadFactor the load factor. |
|
43 | * @param accessOrder the ordering mode - <tt>true</tt> for |
|
44 | * access-order, <tt>false</tt> for insertion-order. |
|
45 | * @throws IllegalArgumentException if the initial capacity is negative |
|
46 | * or the load factor is nonpositive. |
|
47 | */ |
|
48 | public LRUCache(int initialCapacity, int maximumCacheSize, float loadFactor, boolean accessOrder) { |
|
49 | 2 | super(initialCapacity, loadFactor, accessOrder); |
50 | 2 | this.maxCacheSize = maximumCacheSize; |
51 | 2 | } |
52 | ||
53 | /** |
|
54 | * @return Returns the maxCacheSize. |
|
55 | */ |
|
56 | public int getMaxCacheSize() { |
|
57 | 0 | return maxCacheSize; |
58 | } |
|
59 | ||
60 | protected boolean removeEldestEntry(Map.Entry entry) { |
|
61 | 3 | return size() > maxCacheSize; |
62 | } |
|
63 | } |