Pharmazentralnummer.java

/*
 * Copyright 2015 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;

/**
 * PZN8 is a Code 39 based symbology used by the pharmaceutical industry in 
 * Germany. PZN8 encodes a 7 digit number and includes a modulo-10 check digit.
 *
 * @author <a href="mailto:rstuart114@gmail.com">Robin Stuart</a>
 */
public class Pharmazentralnummer extends Symbol {

    /* Pharmazentral Nummer is a Code 3 of 9 symbol with an extra
     * check digit. Now generates PZN-8.
     */

    @Override
    public boolean encode() {
        int l = content.length();
        String localstr;
        int zeroes, count = 0, check_digit;
        Code3Of9 c = new Code3Of9();

        if (l > 7) {
            error_msg = "Input data too long";
            return false;
        }

        if (!(content.matches("[0-9]+"))) {
            error_msg = "Invalid characters in input";
            return false;
        }

        localstr = "-";
        zeroes = 7 - l + 1;
        for (int i = 1; i < zeroes; i++)
            localstr += '0';

        localstr += content;

        for (int i = 1; i < 8; i++) {
            count += i * Character.getNumericValue(localstr.charAt(i));
        }

        check_digit = count % 11;
        if (check_digit == 11) {
            check_digit = 0;
        }
        if (check_digit == 10) {
            error_msg = "Not a valid PZN identifier";
            return false;
        }

        encodeInfo += "Check Digit: " + check_digit + "\n";

        localstr += (char)(check_digit + '0');
        
        try {
            c.setContent(localstr);
        } catch (OkapiException e) {
            error_msg = e.getMessage();
            return false;
        }

        readable = "PZN" + localstr;
        pattern = new String[1];
        pattern[0] = c.pattern[0];
        row_count = 1;
        row_height = new int[1];
        row_height[0] = -1;
        plotSymbol();
        return true;
    }
}