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Telepen.java
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Telepen.java
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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;
/**
* <p>Implements Telepen (also known as Telepen Alpha).
*
* <p>Telepen can encode ASCII text input and includes a modulo-127 check digit.
* Telepen Numeric allows compression of numeric data into a Telepen symbol. Data
* can consist of pairs of numbers or pairs consisting of a numerical digit followed
* by an X character. Telepen Numeric also includes a modulo-127 check digit.
*
* @author <a href="mailto:rstuart114@gmail.com">Robin Stuart</a>
*/
public class Telepen extends Symbol {
/** The different Telepen barcode variants available to encode. */
public enum Mode {
/** Normal Telepen */
NORMAL,
/** Numeric Telepen */
NUMERIC
}
private static final String[] TELE_TABLE = {
"1111111111111111", "1131313111", "33313111", "1111313131",
"3111313111", "11333131", "13133131", "111111313111", "31333111",
"1131113131", "33113131", "1111333111", "3111113131", "1113133111",
"1311133111", "111111113131", "3131113111", "11313331", "333331",
"111131113111", "31113331", "1133113111", "1313113111", "1111113331",
"31131331", "113111113111", "3311113111", "1111131331", "311111113111",
"1113111331", "1311111331", "11111111113111", "31313311", "1131311131",
"33311131", "1111313311", "3111311131", "11333311", "13133311",
"111111311131", "31331131", "1131113311", "33113311", "1111331131",
"3111113311", "1113131131", "1311131131", "111111113311", "3131111131",
"1131131311", "33131311", "111131111131", "3111131311", "1133111131",
"1313111131", "111111131311", "3113111311", "113111111131",
"3311111131", "111113111311", "311111111131", "111311111311",
"131111111311", "11111111111131", "3131311111", "11313133", "333133",
"111131311111", "31113133", "1133311111", "1313311111", "1111113133",
"313333", "113111311111", "3311311111", "11113333", "311111311111",
"11131333", "13111333", "11111111311111", "31311133", "1131331111",
"33331111", "1111311133", "3111331111", "11331133", "13131133",
"111111331111", "3113131111", "1131111133", "33111133", "111113131111",
"3111111133", "111311131111", "131111131111", "111111111133",
"31311313", "113131111111", "3331111111", "1111311313", "311131111111",
"11331313", "13131313", "11111131111111", "3133111111", "1131111313",
"33111313", "111133111111", "3111111313", "111313111111",
"131113111111", "111111111313", "313111111111", "1131131113",
"33131113", "11113111111111", "3111131113", "113311111111",
"131311111111", "111111131113", "3113111113", "11311111111111",
"331111111111", "111113111113", "31111111111111", "111311111113",
"131111111113"
};
private Mode mode;
/**
* Creates a new instance, using mode {@link Mode#NORMAL}.
*/
public Telepen() {
this(Mode.NORMAL);
}
/**
* Creates a new instance, using the specified mode.
*
* @param mode the Telepen mode
*/
public Telepen(Mode mode) {
this.mode = mode;
}
/**
* Sets the Telepen mode.
*
* @param mode the Telepen mode
*/
public void setMode(Mode mode) {
this.mode = mode;
}
/**
* Returns the Telepen mode.
*
* @return the Telepen mode
*/
public Mode getMode() {
return mode;
}
@Override
protected void encode() {
if (mode == Mode.NORMAL) {
normalMode();
} else {
numericMode();
}
}
private void normalMode() {
if (!content.matches("[\u0000-\u007F]*")) {
throw OkapiInputException.invalidCharactersInInput();
}
int count = 0;
StringBuilder dest = new StringBuilder();
dest.append(TELE_TABLE['_']); // Start
for (int i = 0; i < content.length(); i++) {
int asciicode = content.charAt(i);
dest.append(TELE_TABLE[asciicode]);
count += asciicode;
}
int check_digit = 127 - (count % 127);
if (check_digit == 127) {
check_digit = 0;
}
infoLine("Check Digit: " + check_digit);
dest.append(TELE_TABLE[check_digit]);
dest.append(TELE_TABLE['z']); // Stop
readable = content;
pattern = new String[] { dest.toString() };
row_count = 1;
row_height = new int[] { -1 };
}
private void numericMode() {
if (!content.matches("[0-9X]*")) {
throw OkapiInputException.invalidCharactersInInput();
}
/* If input is an odd length, add a leading zero */
String t;
if ((content.length() & 1) == 1) {
t = "0" + content;
} else {
t = content;
}
int count = 0;
StringBuilder dest = new StringBuilder();
dest.append(TELE_TABLE['_']); // Start
for (int i = 0; i < t.length(); i += 2) {
char c1 = t.charAt(i);
char c2 = t.charAt(i + 1);
/* Input nX is allowed, but Xn is not */
if (c1 == 'X') {
throw new OkapiInputException("Invalid position of X in data");
}
int glyph;
if (c2 == 'X') {
glyph = (c1 - '0') + 17;
} else {
glyph = ((10 * (c1 - '0')) + (c2 - '0')) + 27;
}
count += glyph;
dest.append(TELE_TABLE[glyph]);
}
int check_digit = 127 - (count % 127);
if (check_digit == 127) {
check_digit = 0;
}
infoLine("Check Digit: " + check_digit);
dest.append(TELE_TABLE[check_digit]);
dest.append(TELE_TABLE['z']); // Stop
readable = content;
pattern = new String[] { dest.toString() };
row_count = 1;
row_height = new int[] { -1 };
}
}