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package net.librec.util;

public class RatingContext implements Comparable {

    /**
     * rating time stamp
     */
    private long timestamp;

    /**
     * user index
     */
    private int user;

    /**
     * item index
     */
    private int item;

    /**
     * Create a new object with the given rating time stamp, user index
     * and item index.
     *
     * @param user      user index
     * @param item      item index
     * @param timestamp rating time stamp
     */
    public RatingContext(int user, int item, long timestamp) {
        this.user = user;
        this.item = item;
        this.timestamp = timestamp;
    }

    @Override
    public int compareTo(RatingContext o) {
        // TODO Auto-generated method stub

        double res = this.timestamp - o.timestamp;
        if (res > 0)
            return 1;
        else if (res < 0)
            return -1;
        return 0;
    }

    /**
     * Get the user index of the context.
     *
     * @return the user index of the context
     */
    public int getUser() {
        return user;
    }

    /**
     * Get the item index of the context.
     *
     * @return the item index of the context
     */
    public int getItem() {
        return item;
    }

}