초간단 LRU 맵 구현

SimpleLRUMap.java

package kr.iolo.common.collection;

import java.util.LinkedHashMap;
import java.util.Map;

/**
 * LRU 정책에 근거하여 맵의 항목을 유지하는 초간단 LRU 맵 구현.
 *
 * @author iolo
 */
public class SimpleLRUMap<K, V> extends LinkedHashMap<K, V> {
    private static final int DEF_MAX_SIZE = 100;

    private final int maxSize;

    public SimpleLRUMap() {
        this(DEF_MAX_SIZE);
    }

    public SimpleLRUMap(int maxSize) {
        this.maxSize = maxSize;
    }

    @Override
    protected boolean removeEldestEntry(Map.Entry<K, V> eldest) {
        return size() > maxSize;
    }
}