https://github.com/FasterXML/jackson-dataformats-text: Support for reading and writing CSV-encoded data via Jackson abstractions. (FasterXML)
  • Tatu Saloranta 
package com.fasterxml.jackson.dataformat.csv.impl;

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


Helper for simple bounded LRU maps used for reusing lookup values.

/**
 * Helper for simple bounded LRU maps used for reusing lookup values.
 */
@SuppressWarnings("serial")
public class LRUMap<K,V> extends LinkedHashMap<K,V>
{
    protected final int _maxEntries;
    
    public LRUMap(int initialEntries, int maxEntries)
    {
        super(initialEntries, 0.8f, true);
        _maxEntries = maxEntries;
    }

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