Android Open Source - androidata Lru Cache

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License

The source code is released under:

Apache License

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Java Source Code

package com.stanidesis.androidata;
// w w  w.j  a  va  2  s.co m
import java.util.LinkedHashMap;
import java.util.Map;

/**
 * Created by Stanley Idesis on 11/1/14.
 */
public class LruCache<A, B> extends LinkedHashMap<A, B> {
    private static final int DEFAULT_CACHE_SIZE = 100;

    private final int maxEntries;

    public LruCache(){
        this(DEFAULT_CACHE_SIZE);
    }

    public LruCache(final int maxEntries){
        super(maxEntries + 1, 1.0f, true);
        this.maxEntries = maxEntries;
    }

    /**
     * Returns <tt>true</tt> if this <code>LruCache</code> has more entries than the maximum specified when it was
     * created.
     *
     * <p>
     * This method <em>does not</em> modify the underlying <code>Map</code>; it relies on the implementation of
     * <code>LinkedHashMap</code> to do that, but that behavior is documented in the JavaDoc for
     * <code>LinkedHashMap</code>.
     * </p>
     *
     * @param eldest
     *            the <code>Entry</code> in question; this implementation doesn't care what it is, since the
     *            implementation is only dependent on the size of the cache
     * @return <tt>true</tt> if the oldest
     * @see java.util.LinkedHashMap#removeEldestEntry(Map.Entry)
     */
    @Override
    protected boolean removeEldestEntry(final Map.Entry<A, B>eldest){
        return super.size() > maxEntries;
    }
}

Java Source Code List