com.nostra13.universalimageloader.cache.disc.DiscCacheAware Maven / Gradle / Ivy

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package com.nostra13.universalimageloader.cache.disc;

import java.io.File;

/**
 * Interface for disc cache
 * 
 * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
 */
public interface DiscCacheAware {

	/**
	 * This method must not to save file on file system in fact. It is called after image was cached in cache directory
	 * and it was decoded to bitmap in memory. Such order is required to prevent possible deletion of file after it was
	 * cached on disc and before it was tried to decode to bitmap.
	 */
	void put(String key, File file);

	/**
	 * Returns {@linkplain File file object} appropriate incoming key.

	 * NOTE: Must not to return a null. Method must return specific {@linkplain File file object} for
	 * incoming key whether file exists or not.
	 */
	File get(String key);

	/** Clears cache directory */
	void clear();
}