emotionhero/app/src/main/java/com/rubenvandeven/emotionhero/ScoreList.java

package com.rubenvandeven.emotionhero;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;

/**
 * Created by ruben on 19/08/16.
 */

public class ScoreList extends ArrayList<Score>{

    public boolean add(Score score) {
        boolean ret = super.add(score);
        int id = super.indexOf(score);
        score.id = id;
        return ret;
    }

    /**
     * Check if given highscore is highest hit in this set.
     * @param score
     * @return
     */
    public boolean isHighest(Score score) {
        for(Score s: this) {
            if(s == score) // to allow comparison of items that are already in the set
                continue; // skip if it wants to compare with self.

            if(s.score > score.score) {
                return false;
            }
        }
        return true;
    }

    /**
     * Get the n highest hits
     */
    public ScoreList getTopN(int n) {
        Collections.sort(this, new Comparator<Score>() {
            @Override
            public int compare(Score score1, Score score2)
            {
                // return highest first
                return score1.score > score2.score ? -1 : score1.score == score2.score ? 0 : 1;
            }
        });

        if(n > this.size())
            n = this.size();

        ScoreList scores = new ScoreList();
        for (int i = 0; i < n; i++) {
            scores.add(this.get(i));
        }
        return scores;
    }

    /**
     * Get the n highest hits
     * @todo only for current level!!
     */
    public ScoreList getLast(Integer n) {
        Collections.sort(this, new Comparator<Score>() {
            @Override
            public int compare(Score score1, Score score2)
            {
                // return newest first
                return score1.time.before(score2.time) ? -1 : score1.time == score2.time ? 0 : 1;
            }
        });

        if(n == null) { // no limit
            return this;
        }

        if(n > this.size())
            n = this.size();

        ScoreList scores = new ScoreList();
        for (int i = 0; i < n; i++) {
            scores.add(this.get(i));
        }
        return scores;
    }


}