/*
 * 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;


/**
 * Implements Codabar barcode symbology
 * According to BS EN 798:1996
 * <p>
 * Also known as NW-7, Monarch, ABC Codabar, USD-4, Ames Code and Code 27.
 * Codabar can encode any length string starting and ending with the letters
 * A-D and containing between these letters the numbers 0-9, dash (-), dollar
 * ($), colon (:), slash (/), full stop (.) or plus (+). No check digit is
 * generated.
 *
 * @author <a href="mailto:jakel2006@me.com">Robert Elliott</a>
 */
public class Codabar extends Symbol {

    private String[] codabarTable = {"11111221", "11112211", "11121121", "22111111", "11211211", "21111211",
        "12111121", "12112111", "12211111", "21121111", "11122111", "11221111", "21112121", "21211121",
        "21212111", "11212121", "11221211", "12121121", "11121221", "11122211"};

    private char[] characterSet = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
        '-', '$', ':', '/', '.', '+', 'A', 'B', 'C', 'D'};

    @Override
    public boolean encode() {
        if (!(content.matches("[A-D]{1}[0-9:/\\$\\.\\+\u002D]+[A-D]{1}"))) {
            error_msg = "Invalid characters in input";
            return false;
        }

        String horizontalSpacing = "";

        int l = content.length();
        for (int i = 0; i < l; i++) {
             horizontalSpacing += codabarTable[positionOf(content.charAt(i), characterSet)];
        }

        readable = content;
        pattern = new String[] { horizontalSpacing };
        row_count = 1;
        row_height = new int[] { -1 };
        plotSymbol();
        return true;
    }

    /** {@inheritDoc} */
    @Override
    protected int[] getCodewords() {
        return getPatternAsCodewords(8);
    }
}

@@ -1154,33 +1154,56 @@
 ate 
-String%5B%5D codabarTable = %7B
+static final String%5B%5D CODABAR_TABLE = %7B%0A        
 %22111
@@ -1253,24 +1253,32 @@
  %2211211211%22,
+%0A       
  %2221111211%22,
@@ -1277,24 +1277,16 @@
 111211%22,
-%0A       
  %22121111
@@ -1321,24 +1321,32 @@
  %2221121111%22,
+%0A       
  %2211122111%22,
@@ -1381,24 +1381,16 @@
 211121%22,
-%0A       
  %22212121
@@ -1389,24 +1389,32 @@
  %2221212111%22,
+%0A       
  %2211212121%22,
@@ -1460,16 +1460,21 @@
 1122211%22
+%0A    
 %7D;%0A%0A    
@@ -1485,31 +1485,54 @@
 ate 
-char%5B%5D characterSet = %7B
+static final char%5B%5D CHARACTER_SET = %7B%0A        
 '0',
@@ -1551,16 +1551,24 @@
 3', '4',
+%0A       
  '5', '6
@@ -1617,16 +1617,24 @@
 /', '.',
+%0A       
  '+', 'A
@@ -1649,16 +1649,21 @@
 'C', 'D'
+%0A    
 %7D;%0A%0A    
@@ -2021,20 +2021,21 @@
  += 
-codabarTable
+CODABAR_TABLE
 %5Bpos
@@ -2065,20 +2065,21 @@
 i), 
-characterSet
+CHARACTER_SET
 )%5D;%0A

make constants static and final