Android Open Source - AUIL-for-volley Base Disc Cache

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License

The source code is released under:

Apache License

Java Source Code

/*******************************************************************************
 * Copyright 2011-2013 Sergey Tarasevich
 *//from  w w w .  j a  va  2 s  .  c  o  m
 * 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.cache.disc;

import com.nostra13.universalimageloader.cache.disc.naming.FileNameGenerator;
import com.nostra13.universalimageloader.core.DefaultConfigurationFactory;

import java.io.File;

/**
 * Base disc cache. Implements common functionality for disc cache.
 *
 * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
 * @see DiscCacheAware
 * @see FileNameGenerator
 * @since 1.0.0
 */
public abstract class BaseDiscCache implements DiscCacheAware {

  private static final String ERROR_ARG_NULL = "\"%s\" argument must be not null";

  protected File cacheDir;

  private FileNameGenerator fileNameGenerator;

  public BaseDiscCache(File cacheDir) {
    this(cacheDir, DefaultConfigurationFactory.createFileNameGenerator());
  }

  public BaseDiscCache(File cacheDir, FileNameGenerator fileNameGenerator) {
    if (cacheDir == null) {
      throw new IllegalArgumentException(String.format(ERROR_ARG_NULL, "cacheDir"));
    }
    if (fileNameGenerator == null) {
      throw new IllegalArgumentException(String.format(ERROR_ARG_NULL, "fileNameGenerator"));
    }

    this.cacheDir = cacheDir;
    this.fileNameGenerator = fileNameGenerator;
  }

  @Override
  public File get(String key) {
    String fileName = fileNameGenerator.generate(key);
    return new File(cacheDir, fileName);
  }

  @Override
  public void clear() {
    File[] files = cacheDir.listFiles();
    if (files != null) {
      for (File f : files) {
        f.delete();
      }
    }
  }
}

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