UnsafeMemorizer

UnsafeMemoizer.java

package concurrentcache.cache;

import java.util.HashMap;
import java.util.Map;

import concurrentcache.computable.Computable;

/**
 * A basic memoization implementation that caches computed results.
 * This implementation is not thread-safe and should not be used in concurrent environments.
*/
public class UnsafeMemoizer<A,V> implements Computable<A,V> {
    private final Map<A,V> cache = new HashMap<>();
    private final Computable<A,V> computable;

    public UnsafeMemoizer(Computable<A,V> computable) {
        this.computable = computable;
    }

    @Override
    public V compute(A arg) throws InterruptedException {
        V result = cache.get(arg);
        if (result == null) {
            result = computable.compute(arg);
            cache.put(arg, result);
        }
        return result;
    }
}