package cn.trinea.android.common.service.impl;
import cn.trinea.android.common.entity.CacheObject;
import cn.trinea.android.common.service.CacheFullRemoveType;
import cn.trinea.android.common.util.FileUtils;
/**
* Remove type when cache is full, data type of cache is string, and it represents the path of a file.<br/>
* <ul>
* <li>if file is smaller, remove it first</li>
* <li>if file is equal to each other, remove the one which is used less</li>
* <li>if file is equal to each other and used count is equal, remove the one which is first in</li>
* </ul>
*
* @author <a href="http://www.trinea.cn" target="_blank">Trinea</a> 2011-12-26
*/
public class RemoveTypeFileSmall implements CacheFullRemoveType<String> {
private static final long serialVersionUID = 1L;
@Override
public int compare(CacheObject<String> obj1, CacheObject<String> obj2) {
long sizeOfFile1 = (obj1 == null ? -1 : FileUtils.getFileSize(obj1.getData()));
long sizeOfFile2 = (obj2 == null ? -1 : FileUtils.getFileSize(obj2.getData()));
if (sizeOfFile1 == sizeOfFile2) {
if (obj1.getUsedCount() == obj2.getUsedCount()) {
return (obj1.getEnterTime() > obj2.getEnterTime()) ? 1
: ((obj1.getEnterTime() == obj2.getEnterTime()) ? 0 : -1);
}
return (obj1.getUsedCount() > obj2.getUsedCount() ? 1 : -1);
}
return (sizeOfFile1 > sizeOfFile2 ? 1 : -1);
}
}