package com.bumptech.glide.load;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;

/**
 * A very generic interface that must implement {@link #equals(Object)} and {@link #hashCode()} to include a set of
 * uniquely identifying information for the object(s) represented by this key. Keys are used as cache keys so they must
 * be unique within a given dataset.
 *
 */
public interface Key {

    /**
     * Adds all uniquely identifying information to the given digest.
     */
    public void updateDiskCacheKey(MessageDigest messageDigest) throws UnsupportedEncodingException;

}