46 lines
1.6 KiB
Java
46 lines
1.6 KiB
Java
/*
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* Copyright (c) 2012 The Broad Institute
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
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* THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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package org.broadinstitute.sting.utils;
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import java.util.LinkedHashMap;
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import java.util.Map;
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/**
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* An LRU cache implemented as an extension to LinkedHashMap
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*/
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public class LRUCache<K,V> extends LinkedHashMap<K,V> {
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private int capacity; // Maximum number of items in the cache.
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public LRUCache(int capacity) {
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super(capacity+1, 1.0f, true); // Pass 'true' for accessOrder.
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this.capacity = capacity;
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}
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protected boolean removeEldestEntry(final Map.Entry entry) {
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return (size() > this.capacity);
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}
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}
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