net.sourceforge.fenixedu.domain.inquiries.QuestionScale.java Source code

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Here is the source code for net.sourceforge.fenixedu.domain.inquiries.QuestionScale.java

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/**
 * Copyright  2002 Instituto Superior Tcnico
 *
 * This file is part of FenixEdu Core.
 *
 * FenixEdu Core 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 Core 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 Core.  If not, see <http://www.gnu.org/licenses/>.
 */
package net.sourceforge.fenixedu.domain.inquiries;

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

import net.sourceforge.fenixedu.domain.exceptions.DomainException;

import org.apache.commons.lang.StringUtils;

import pt.utl.ist.fenix.tools.util.i18n.MultiLanguageString;

public class QuestionScale implements Serializable {

    private MultiLanguageString[] scale;
    private String[] scaleValues;
    private final static String SCALE_KEY = "qs$";
    private final static String SCALE_VALUE_SEPARATOR = "_#_";

    private static final long serialVersionUID = 1L;

    public QuestionScale(MultiLanguageString[] scale, String[] values) {
        if (scale.length != values.length) {
            throw new DomainException("error.questionChoice.scaleDontMatchValues");
        }
        setScale(scale);
        setScaleValues(values);
    }

    public int getScaleLength() {
        return getScale() != null ? getScale().length : 0;
    }

    public String exportAsString() {
        final StringBuilder result = new StringBuilder();
        for (int iter = 0; iter < getScale().length; iter++) {
            final String scaleItem = getScale()[iter].exportAsString();
            final String scaleValue = getScaleValues()[iter];
            result.append(SCALE_KEY);
            result.append(scaleItem.length() + scaleValue.length() + SCALE_VALUE_SEPARATOR.length());
            result.append(':');
            result.append(scaleValue);
            result.append(SCALE_VALUE_SEPARATOR);
            result.append(scaleItem);
        }
        return result.toString();
    }

    public static QuestionScale importFromString(String string) {
        if (string == null) {
            return null;
        }

        List<MultiLanguageString> scalePortions = new ArrayList<MultiLanguageString>();
        List<String> valuePortions = new ArrayList<String>();
        for (int iter = 0; iter < string.length();) {
            int length = 0;
            int collonPosition = string.indexOf(':', iter + 3);

            if (StringUtils.isNumeric(string.substring(iter + 3, collonPosition))) {
                length = Integer.parseInt(string.substring(iter + 3, collonPosition));
                String scalePortion = string.substring(collonPosition + 1, collonPosition + 1 + length);
                int index = scalePortion.indexOf(SCALE_VALUE_SEPARATOR);
                String value = scalePortion.substring(0, index);
                String scale = scalePortion.substring(index + 3);
                valuePortions.add(valuePortions.size(), value);
                scalePortions.add(scalePortions.size(), MultiLanguageString.importFromString(scale));
            }
            iter = collonPosition + 1 + length;
        }

        return new QuestionScale(scalePortions.toArray(new MultiLanguageString[] {}),
                valuePortions.toArray(new String[] {}));
    }

    @Override
    public String toString() {
        StringBuilder string = new StringBuilder();
        for (int iter = 0; iter < getScaleLength(); iter++) {
            string.append(getScale()[iter].toString());
            string.append(" -#- ");
        }
        return string.toString();
    }

    public MultiLanguageString[] getScale() {
        return scale;
    }

    public void setScale(MultiLanguageString[] scale) {
        this.scale = scale;
    }

    public void setScaleValues(String[] scaleValues) {
        this.scaleValues = scaleValues;
    }

    public String[] getScaleValues() {
        return scaleValues;
    }

    public String getLabelByValue(String scaleValue) {
        for (int iter = 0; iter < getScaleValues().length; iter++) {
            if (scaleValue.equals(getScaleValues()[iter])) {
                return getScale()[iter].toString();
            }
        }
        return null;
    }
}