EctsComparabilityPercentages.java

/**
 * Copyright © 2002 Instituto Superior Técnico
 *
 * This file is part of FenixEdu Academic.
 *
 * FenixEdu Academic is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * FenixEdu Academic 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with FenixEdu Academic.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.fenixedu.academic.domain.degreeStructure;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang.StringUtils;
import org.fenixedu.academic.domain.exceptions.DomainException;

public class EctsComparabilityPercentages implements Serializable {
    private static final long serialVersionUID = 7682260143153322085L;

    private final double[] percentages;

    EctsComparabilityPercentages(double[] percentages) {
        this.percentages = percentages;
    }

    EctsComparabilityPercentages(String[] percentages) {
        this.percentages = extractPercentages(percentages);
    }

    private double[] extractPercentages(String[] percentages) {
        try {
            double[] perc = new double[11];
            for (int i = 0; i < perc.length; i++) {
                perc[i] = Double.parseDouble(percentages[i]);
            }
            return perc;
        } catch (NumberFormatException e) {
            throw new DomainException("error.ects.invalidTable", StringUtils.join(percentages, "<tab>"));
        }
    }

    public double getPercentage(int grade) {
        if (grade < 10 || grade > 20) {
            throw new DomainException("error.degreeStructure.converting.grade.not.in.approval.range");
        }
        return percentages[grade - 10];
    }

    public String getPrintableFormat() {
        return toString();
    }

    @Override
    public String toString() {
        List<String> percents = new ArrayList<String>();
        for (double percentage : percentages) {
            percents.add(Double.toString(percentage));
        }
        return StringUtils.join(percents, ":");
    }

    public static EctsComparabilityPercentages fromString(String serialized) {
        return new EctsComparabilityPercentages(serialized.split(":"));
    }

    public static EctsComparabilityPercentages fromStringArray(String[] percentages) {
        if (isEmpty(percentages)) {
            return null;
        }
        return new EctsComparabilityPercentages(percentages);
    }

    private static boolean isEmpty(String[] table) {
        for (String part : table) {
            if (!StringUtils.isEmpty(part)) {
                return false;
            }
        }
        return true;
    }
}