ScoreTerm.java

/*
 * ELW : e-learning workspace
 * Copyright (C) 2010  Anton Kraievoy
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package elw.vo;

import org.codehaus.jackson.annotate.JsonIgnore;

/**
 * ReST respesentation of single-{@link Criteria}
 * {@link Score} component.
 */
public class ScoreTerm extends ScoreTermInput {
    private final FileSlot slot;
    private final Criteria criteria;

    public ScoreTerm(String id, double ratio, int pow, final FileSlot slot, final Criteria criteria) {
        super(ratio, id, pow);
        this.slot = slot;
        this.criteria = criteria;
    }

    public String getNiceRatio() {
        return getNiceRatio(ratio);
    }

    private static String getNiceRatio(final double ratio) {
        if (Math.abs(ratio - 1) < 1e-2) {
            return "";
        }

        final double percentage = Math.round(ratio * 1000) / 10.0;

        if (percentage < 100) {
            return "-" + org.akraievoy.base.Format.format2(100 - percentage) + "%";
        }

        return "+" + org.akraievoy.base.Format.format2(percentage - 100) + "%";
    }

    @JsonIgnore
    public boolean isIdentity() {
        return Math.abs(ratio - 1) < 1e-2;
    }

    public boolean isPositive() {
        return ratio > 1;
    }

    public Criteria getCriteria() {
        return criteria;
    }

    @JsonIgnore
    public FileSlot getSlot() {
        return slot;
    }
}