com.soulgalore.velocity.PopularListTool Maven / Gradle / Ivy

Go to download
package com.soulgalore.velocity;

import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

public class PopularListTool {

	/**
	 * Hold all the assets
	 */
	private Map urlAndData = new HashMap();


	// TODO sync
	public void push(String url) {
		UrlRequests data = urlAndData.get(url);
		if (data == null)
			urlAndData.put(url, new UrlRequests(url, 1));
		else {
			urlAndData.put(url, new UrlRequests(url, data.getNrOfTimes() + 1));
		}
	}

	public Collection getMostPopularUrls(int maxUrls) {

		List list = new LinkedList(
				urlAndData.values());
		Collections.sort(list, new UrlRequestsComparator());
		return list.subList(0, maxUrls > list.size() ? list.size() : maxUrls);
	}

	private class UrlRequestsComparator implements Comparator {

		@Override
		public int compare(UrlRequests o1, UrlRequests o2) {
			if (o1.getNrOfTimes() < o2.getNrOfTimes())
				return 1;
			else if (o1.getNrOfTimes() > o2.getNrOfTimes())
				return -1;
			else
				return 0;
		}

	}
}