Android Open Source - AUIL-for-volley F I F O Limited Memory Cache

• Back to Image/loader  ↑

From Project

Back to project page AUIL-for-volley.

License

The source code is released under:

Apache License

Java Source Code

/*******************************************************************************
 * Copyright 2011-2013 Sergey Tarasevich
 *//from  w  ww.j a  v  a 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.memory.impl;

import android.graphics.Bitmap;
import com.nostra13.universalimageloader.cache.memory.LimitedMemoryCache;

import java.lang.ref.Reference;
import java.lang.ref.WeakReference;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;

/**
 * Limited {@link Bitmap bitmap} cache. Provides {@link Bitmap bitmaps} storing. Size of all stored bitmaps will not to
 * exceed size limit. When cache reaches limit size then cache clearing is processed by FIFO principle.<br />
 * <br />
 * <b>NOTE:</b> This cache uses strong and weak references for stored Bitmaps. Strong references - for limited count of
 * Bitmaps (depends on cache size), weak references - for all other cached Bitmaps.
 *
 * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
 * @since 1.0.0
 */
public class FIFOLimitedMemoryCache extends LimitedMemoryCache<String, Bitmap> {

  private final List<Bitmap> queue = Collections.synchronizedList(new LinkedList<Bitmap>());

  public FIFOLimitedMemoryCache(int sizeLimit) {
    super(sizeLimit);
  }

  @Override
  public boolean put(String key, Bitmap value) {
    if (super.put(key, value)) {
      queue.add(value);
      return true;
    } else {
      return false;
    }
  }

  @Override
  public void remove(String key) {
    Bitmap value = super.get(key);
    if (value != null) {
      queue.remove(value);
    }
    super.remove(key);
  }

  @Override
  public void clear() {
    queue.clear();
    super.clear();
  }

  @Override
  protected int getSize(Bitmap value) {
    return value.getRowBytes() * value.getHeight();
  }

  @Override
  protected Bitmap removeNext() {
    return queue.remove(0);
  }

  @Override
  protected Reference<Bitmap> createReference(Bitmap value) {
    return new WeakReference<Bitmap>(value);
  }
}

Java Source Code List

• Back to Image/loader  ↑