funnycats.RankingController.java Source code

Introduction

Here is the source code for funnycats.RankingController.java

Source

/*
 * The MIT License
 *
 * Copyright (c) <2011> <Bruno P. Kinoshita>
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package funnycats;

import java.util.Collections;
import java.util.Comparator;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

/**
 * @author Bruno P. Kinoshita - http://www.kinoshita.eti.br
 * @since 0.1
 */
@Controller
@RequestMapping(value = "/ranking")
public class RankingController {

    @RequestMapping(method = RequestMethod.GET)
    public String getRanking(Model model) {
        Map sortedMap = this.sortByRating(CatController.cats);
        model.addAttribute("cats", sortedMap);
        return "ranking";
    }

    @RequestMapping(value = "{catId}/{value}", method = RequestMethod.GET)
    public String vote(@PathVariable(value = "catId") Long catId, @PathVariable(value = "value") Integer value,
            Model model) {
        FunnyCat cat = CatController.cats.get(catId);
        cat.addVote(value);
        return "redirect:/cats/" + catId;
    }

    private Map sortByRating(Map<?, ?> unsortedMap) {
        List list = new LinkedList(unsortedMap.entrySet());

        // sort list based on comparator
        Collections.sort(list, new Comparator() {
            public int compare(Object o1, Object o2) {
                return ((Comparable) ((Map.Entry) (o1)).getValue()).compareTo(((Map.Entry) (o2)).getValue());
            }
        });
        Collections.reverse(list);

        // put sorted list into map again
        Map sortedMap = new LinkedHashMap();
        for (Iterator it = list.iterator(); it.hasNext();) {
            Map.Entry entry = (Map.Entry) it.next();
            sortedMap.put(entry.getKey(), entry.getValue());
        }
        return sortedMap;
    }

}