OpenConcerto

Dépôt officiel du code source de l'ERP OpenConcerto
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svn://code.openconcerto.org/openconcerto

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/*
 * Copyright 2014 Robin Stuart
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package uk.org.okapibarcode.backend;

import static uk.org.okapibarcode.util.Arrays.positionOf;

/**
 * Implements the LOGMARS (Logistics Applications of Automated Marking and Reading Symbols) standard
 * used by the US Department of Defense. Input data can be of any length and supports the characters
 * 0-9, A-Z, dash (-), full stop (.), space, dollar ($), slash (/), plus (+) and percent (%). A
 * Modulo-43 check digit is calculated and added, and should not form part of the input data.
 *
 * @author <a href="mailto:rstuart114@gmail.com">Robin Stuart</a>
 */
public class Logmars extends Symbol {

    private static final String[] CODE39LM = { "1113313111", "3113111131", "1133111131", "3133111111", "1113311131", "3113311111", "1133311111", "1113113131", "3113113111", "1133113111", "3111131131",
            "1131131131", "3131131111", "1111331131", "3111331111", "1131331111", "1111133131", "3111133111", "1131133111", "1111333111", "3111111331", "1131111331", "3131111311", "1111311331",
            "3111311311", "1131311311", "1111113331", "3111113311", "1131113311", "1111313311", "3311111131", "1331111131", "3331111111", "1311311131", "3311311111", "1331311111", "1311113131",
            "3311113111", "1331113111", "1313131111", "1313111311", "1311131311", "1113131311" };

    private static final char[] LOOKUP = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U',
            'V', 'W', 'X', 'Y', 'Z', '-', '.', ' ', '$', '/', '+', '%' };

    /** Ratio of wide bar width to narrow bar width. */
    private double moduleWidthRatio = 3;

    /**
     * Sets the ratio of wide bar width to narrow bar width. Valid values are usually between
     * {@code 2} and {@code 3}. The default value is {@code 3}.
     *
     * @param moduleWidthRatio the ratio of wide bar width to narrow bar width
     */
    public void setModuleWidthRatio(final double moduleWidthRatio) {
        this.moduleWidthRatio = moduleWidthRatio;
    }

    /**
     * Returns the ratio of wide bar width to narrow bar width.
     *
     * @return the ratio of wide bar width to narrow bar width
     */
    public double getModuleWidthRatio() {
        return this.moduleWidthRatio;
    }

    /** {@inheritDoc} */
    @Override
    protected double getModuleWidth(final int originalWidth) {
        if (originalWidth == 1) {
            return 1;
        } else {
            return this.moduleWidthRatio;
        }
    }

    /** {@inheritDoc} */
    @Override
    protected void encode() {

        if (!this.content.matches("[0-9A-Z\\. \\-$/+%]*")) {
            throw new OkapiException("Invalid characters in input");
        }

        String p = "";
        final int l = this.content.length();
        int charval, counter = 0;
        char thischar;
        char checkDigit;
        for (int i = 0; i < l; i++) {
            thischar = this.content.charAt(i);
            charval = positionOf(thischar, LOOKUP);
            counter += charval;
            p += CODE39LM[charval];
        }

        counter = counter % 43;
        checkDigit = LOOKUP[counter];
        infoLine("Check Digit: " + checkDigit);
        p += CODE39LM[counter];

        this.readable = this.content + checkDigit;
        this.pattern = new String[] { "1311313111" + p + "131131311" };
        this.row_count = 1;
        this.row_height = new int[] { -1 };
    }
}