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