content: /*******************************************************************************
   * Copyright 2011-2013 Sergey Tarasevich
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *******************************************************************************/
  package com.nostra13.universalimageloader.utils;
  
  import com.nostra13.universalimageloader.cache.disc.DiskCache;
  
  import java.io.File;
  
  /**
   * Utility for convenient work with disk cache.<br />
   * <b>NOTE:</b> This utility works with file system so avoid using it on application main thread.
   *
   * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
   * @since 1.8.0
   */
  public final class DiskCacheUtils {
  
  	private DiskCacheUtils() {
  	}
  
  	/** Returns {@link File} of cached image or <b>null</b> if image was not cached in disk cache */
  	public static File findInCache(String imageUri, DiskCache diskCache) {
  		File image = diskCache.get(imageUri);
  		return image != null && image.exists() ? image : null;
  	}
  
  	/**
  	 * Removed cached image file from disk cache (if image was cached in disk cache before)
  	 *
  	 * @return <b>true</b> - if cached image file existed and was deleted; <b>false</b> - otherwise.
  	 */
  	public static boolean removeFromCache(String imageUri, DiskCache diskCache) {
  		File image = diskCache.get(imageUri);
  		return image != null && image.exists() && image.delete();
  	}
  }
  