package generell;

import java.io.IOException;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;

/**
 * CacheDeleter - beinhaltet alle Funktione zum Cachen eines Suchbegriffs und
 * seiner Results
 * 
 * @author Sebastian Enger
 * @see Serialization
 * @since 1.1
 * @version 1.1 / 2011-08-21
 * @typ Class
 * 
 */
public class CacheDeleter implements Serializable {

	private static final long                           serialVersionUID = 1L;
	 
	HashMap<String, ArrayList<ResultContainer>> cache = new HashMap<String, ArrayList<ResultContainer>>();

	  /** Cache Writer/Reader*/
    private Serialization                               ser;
    
	public CacheDeleter(HashMap<String, ArrayList<ResultContainer>> cache) throws IOException {
		this.cache = cache;
		ser = new Serialization( Constant.CACHEFILE );
	}

	public synchronized void cleanCache( HashMap<String, ArrayList<ResultContainer>> cache ) {

		ArrayList<ResultContainer> value = new ArrayList<ResultContainer>();
		long epoch = System.currentTimeMillis() / 1000;
		int count = 0;

		for (String key : cache.keySet()) {
			value = this.cache.get(key);
			ResultContainer it = value.get(count);
			long storetime = it.getLastChecked();
			if (storetime + Constant.CACHE_VALID_TIME > epoch) { 
				value.remove(count);
			}  			 
			count++;
		} 
		
		ser.writeCache(cache);

	}  
} // static class CacheDeleter extends Thread {