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/*
* Copyright 2017 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.zxing.web;
import java.util.LinkedHashMap;
import java.util.Map;
/**
* Map with maximum size that removes least-recently-accessed entries when full.
*
* @param <K> map key type
* @param <V> map value type
*/
final class LRUMap<K,V> extends LinkedHashMap<K,V> {
private final int maxSize;
LRUMap(int maxSize) {
super(100, 0.75f, true);
this.maxSize = maxSize;
}
@Override
protected boolean removeEldestEntry(Map.Entry<K,V> eldest) {
return size() > maxSize;
}
}
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