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Barcode4J is a flexible generator for barcodes written in Java inclusive
extensions to support Apache FOP 0.20.5.
The newest version!
/*
* Copyright 2005 Dietmar B?rkle.
*
* 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 org.krysalis.barcode4j.impl.code128;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.Properties;
import java.util.ResourceBundle;
import java.util.StringTokenizer;
/**
* This class keeps Informations about EAN 128 Application Identifiers (AIs).
*
* @author Dietmar B?rkle
*/
public class EAN128AI {
public final static byte CONSTLenMax = 48; // Max according to EAN128 specification.
public final static byte TYPEAlphaNum = 0;
public final static byte TYPENum = 1;
public final static byte TYPEAlpha = 2; //Unused at the moment, but mentioned by
//the EAN128 specification.
public final static byte TYPENumDate = 3;
public final static byte TYPEError = 4;
public final static byte TYPECD = 5; //Check digit
private final static String[] typeToString = {"an", "n", "a", "d", "e", "cd"};
// public final static byte TYPEAlphaNum421 = 7;
String id;
byte lenID, lenMinAll, lenMaxAll;
byte minLenAfterVariableLen;
byte[] lenMin, lenMax, type, checkDigitStart;
boolean fixed = false, canDoChecksumADD = false;
private static String[] fixedLenTable = new String[]{
"00", "01", "02", "03", "04",
"11", "12", "13", "14", "15", "16", "17", "18", "19",
"20",
"31", "32", "33", "34", "35", "36",
"41"};
private static byte[] fixedLenValueTable = new byte[]{
20, 16, 16, 16, 18,
8, 8, 8, 8, 8, 8, 8, 8, 8,
4,
10, 10, 10, 10, 10, 10,
16};
private static EAN128AI dft = parseSpecPrivate("xx", "an1-48");
private static Object[] aiTable = new Object[]
{dft, dft, dft, dft, dft, dft, dft, dft, dft, dft};
private static boolean propertiesLoaded = false;
private static class AIProperties extends Properties {
public synchronized Object put(Object arg0, Object arg1) {
EAN128AI ai = parseSpecPrivate((String)arg0, (String)arg1);
try {
setAI((String)arg0, ai);
} catch (Exception e) {
System.err.println(e);
}
return super.put(arg0, arg1);
}
}
private static void initFixedLen(String aiName, byte aiLen) {
byte lenID = (byte)aiName.length();
EAN128AI ai = new EAN128AI(aiName, "an" + aiLen, lenID, TYPEAlphaNum, aiLen);
try {
setAI(aiName, ai);
} catch (Exception e) {
System.err.println(e);
}
}
static {
for (int i = 0; i <= 9; i++) {
initFixedLen("23" + i, (byte)(1 + 9 * i));
}
for (int i = fixedLenValueTable.length - 1; i >= 0; i--) {
initFixedLen(fixedLenTable[i], (byte)(fixedLenValueTable[i] - 2));
}
// loadProperties();
}
public static synchronized void loadProperties() throws Exception {
if (propertiesLoaded) return;
final String bundlename = "EAN128AIs";
final String filename = bundlename + ".properties";
Properties p = new AIProperties();
try {
InputStream is = EAN128AI.class.getResourceAsStream(filename);
if (is == null) {
// System.err.println(filename + " could not be loaded with class.getResourceAsStream()");
is = EAN128AI.class.getClassLoader().getResourceAsStream(filename);
}
if (is != null) {
try {
p.load(is);
} finally {
is.close();
}
} else {
// System.err.println(filename + " could not be loaded with getClassLoader().getResourceAsStream()");
// The getResourceAsStream variants do not work if an applet is loading
// several jars from different directories (as in examples\demo-applet\html\index.html)!
// ResourceBundle does this job. It seems to have more privileges.
// It is not the best choice (as we never want to translate EAN128AIs.properties),
// but it works.
String rbName = EAN128AI.class.getPackage().getName() + "." + bundlename;
ResourceBundle rb = ResourceBundle.getBundle(rbName);
Enumeration keys = rb.getKeys();
while (keys.hasMoreElements()){
String key = (String) keys.nextElement();
p.put(key, rb.getObject(key));
}
}
} catch (Exception e) {
System.err.println(filename + " could not be loaded!");
e.printStackTrace();
// Not loading EAN128AIs.properties is a severe error.
// But the code is still usable, if you use templates or do not rely on checkdigits.
// Maybe it would be better to throw this exception and find out how this cold happen.
}
propertiesLoaded = true;
}
private EAN128AI(String id, byte lenID, byte[] type, byte[] lenMin, byte[] lenMax, byte[] checkDigitStart){
this.id = id;
this.lenID = lenID;
this.type = type;
this.lenMin = lenMin;
this.lenMax = lenMax;
this.checkDigitStart = checkDigitStart;
lenMinAll = lenMaxAll = minLenAfterVariableLen = 0;
int idxVarLen = type.length;
int idxFirstChecksum = -1;
// canDoChecksumADD = true;
for (int i = 0; i < type.length; i++) {
lenMinAll += lenMin[i];
lenMaxAll += lenMax[i];
if (i > idxVarLen)
minLenAfterVariableLen += lenMin[i];
if (lenMin[i] != lenMax[i]) {
if (idxVarLen < type.length)
throw new IllegalArgumentException("Only one Part with var len!"); //TODO
idxVarLen = i;
}
if (idxFirstChecksum == -1 && type[i] == TYPECD)
idxFirstChecksum = i;
}
canDoChecksumADD = (idxFirstChecksum == type.length - 1 && lenMinAll == lenMaxAll);
}
private EAN128AI(String id, String spec, byte lenID, byte type, byte len) {
this(id, lenID,
new byte[] {type}, new byte[] {len}, new byte[] {len},
new byte[] {CheckDigit.CDNone});
fixed = true;
}
// public boolean isCheckDigit(int i) {
// return (type[i] == TYPECDWight31 || type[i] == TYPECDWight1);
// }
private static void checkFixed(EAN128AI aiNew, EAN128AI aiOld) {
if (aiOld.fixed && !aiNew.fixed) {
if (aiNew.lenMaxAll != aiNew.lenMinAll
|| aiNew.lenID + aiNew.lenMinAll != aiOld.lenID + aiOld.lenMinAll) {
throw new IllegalArgumentException("AI \"" + aiNew.toString()
+ "\" must have fixed len: " + aiOld.lenID + "+" + aiOld.lenMinAll);
}
aiNew.fixed = true;
}
}
private static void SetAIHere(EAN128AI ai, Object[] aitParent) {
for (int idx = 0; idx <= 9; idx++) {
SetAIHere(ai, aitParent, idx);
}
}
private static void SetAIHere(EAN128AI aiNew, Object[] aitParent, int idx) {
Object tmp = aitParent[idx];
if (tmp instanceof EAN128AI) {
EAN128AI aiOld = (EAN128AI)tmp;
if (aiNew.type[0] == TYPEError) {
aiOld.type[0] = TYPEError;
} else {
checkFixed(aiNew, aiOld);
aitParent[idx] = aiNew;
}
} else { //tmp instanceof Object[]
SetAIHere(aiNew, (Object[])tmp);
}
}
private static void setAI(String aiName, EAN128AI ai) {
Object[] aitParent = aiTable;
int aiLastRelevantIdx = aiName.length() - 1;
while (aiLastRelevantIdx >= 0
&& !Character.isDigit(aiName.charAt(aiLastRelevantIdx))) {
aiLastRelevantIdx--;
}
Object tmp;
for (int i = 0; i <= aiLastRelevantIdx; i++) {
int idx = aiName.charAt(i) - '0';
if (i == aiLastRelevantIdx) {
SetAIHere(ai, aitParent, idx);
} else {
tmp = aitParent[idx];
if (tmp instanceof EAN128AI) {
tmp = new Object[] {tmp, tmp, tmp, tmp, tmp, tmp, tmp, tmp, tmp, tmp};
aitParent[idx] = tmp;
}
aitParent = (Object[])tmp;
}
}
}
public static EAN128AI parseSpec(String ai, String spec) {
EAN128AI ret = parseSpecPrivate(ai, spec);
checkAI(ret);
return ret;
}
private static void parseSpecPrivate(int i, String spec,
byte[] type, byte[] lenMin, byte[] lenMax, byte[] checkDigitStart) {
int startLen = 0;
checkDigitStart[i] = 1;
lenMin[i] = lenMax[i] = -1;
if (spec.startsWith("an")) {
type[i] = TYPEAlphaNum;
startLen = 2;
} else if (spec.startsWith("a")) {
type[i] = TYPEAlpha;
startLen = 1;
} else if (spec.startsWith("cd")) {
type[i] = TYPECD;
if (spec.length() > 2) {
checkDigitStart[i] = Byte.parseByte(spec.substring(2));
}
lenMin[i] = lenMax[i] = 1;
return;
} else if (spec.startsWith("n")) {
type[i] = TYPENum;
startLen = 1;
} else if (spec.startsWith("d")) {
type[i] = TYPENumDate;
lenMin[i] = lenMax[i] = 6;
startLen = 1;
} else if (spec.startsWith("e")) {
type[i] = TYPEError;
lenMin[i] = lenMax[i] = 0;
return;
} else {
throw new IllegalArgumentException("Unknown type!");
}
int hyphenIdx = spec.indexOf('-', startLen);
if (hyphenIdx < 0) {
lenMin[i] = lenMax[i] = parseByte(spec.substring(startLen), lenMin[i], spec);
} else if (hyphenIdx == startLen) {
lenMin[i] = 1;
lenMax[i] = parseByte(spec.substring(startLen + 1), lenMax[i], spec);
} else { // hyphenIdx > startLen
lenMin[i] = parseByte(spec.substring(startLen, hyphenIdx), lenMin[i], spec);
lenMax[i] = parseByte(spec.substring(hyphenIdx + 1), lenMax[i], spec);
}
if (type[i] == TYPENumDate) {
if (lenMin[i] != 6 || lenMax[i] != 6) {
throw new IllegalArgumentException("Date field (" + spec + ") must have length 6!");
}
}
}
private static byte parseByte(String val, byte dft, String spec) {
try {
return Byte.parseByte(val);
} catch (Exception e) {
if (dft == -1) {
throw new IllegalArgumentException("Can't read field length from \"" + spec + "\"");
}
return dft;
}
}
private static EAN128AI parseSpecPrivate(String ai, String spec) {
try {
byte lenID = (byte) ai.trim().length();
spec = spec.trim();
StringTokenizer st = new StringTokenizer(spec, "+", false);
int count = st.countTokens();
byte[] type = new byte[count];
byte[] checkDigitStart = new byte[count];
byte[] lenMin = new byte[count];
byte[] lenMax = new byte[count];
for (int i = 0; i < count; i++) {
parseSpecPrivate(i, st.nextToken(), type, lenMin, lenMax, checkDigitStart);
}
return new EAN128AI(ai, lenID, type, lenMin, lenMax, checkDigitStart);
} catch (IllegalArgumentException iae) {
throw iae;
} catch (Exception e) {
throw new IllegalArgumentException(
"Cannot Parse AI: \"" + ai + "\" spec: \"" + spec + "\" ");
}
}
public static boolean checkAI(EAN128AI ai) {
EAN128AI aiCompare = getAIPrivate(ai.id + "0000", 0);
checkFixed(ai, aiCompare);
return true;
}
public static EAN128AI getAI(String msg, int msgStart) throws Exception {
loadProperties();
return getAIPrivate(msg, msgStart);
}
private static EAN128AI getAIPrivate(String msg, int msgStart) {
EAN128AI ret = dft;
Object o = aiTable;
int c;
for (int i = 0; i < msg.length() - msgStart; i++) {
c = getIDChar(msg, msgStart + i) - '0';
o = ((Object[])o)[c];
if (o == null) {
return dft;
}
if (o instanceof EAN128AI) {
ret = (EAN128AI)o;
break;
}
}
return ret;
}
private static char getIDChar(String msg, int msgStart) {
char ret;
try {
ret = msg.charAt(msgStart);
} catch (Exception e) {
throw new IllegalArgumentException("Unable to read AI: Message too short!");
}
if (!Character.isDigit(ret)) {
throw new IllegalArgumentException("Unable to read AI: Characters must be numerical!");
}
return ret;
}
public static final boolean isCheckDigitType(byte type) {
return (type == TYPECD);
}
public final boolean isCheckDigit(byte idx) {
return isCheckDigitType(type[idx]);
}
public static final String getType(byte type) {
String ret = "?";
try {
ret = typeToString[type];
} catch (Exception e) {
//ignore
}
return ret;
}
/** {@inheritDoc} */
public String toString() {
StringBuffer ret = new StringBuffer();
ret.append('(').append(id).append(")");
for (int i = 0; i < lenMin.length; i++) {
if (i != 0) {
ret.append('+');
}
ret.append(getType(type[i]));
// if (checkDigit[i] == CheckDigit.CD11)
// ret.append("w1");
if (type[i] < TYPEError) {
ret.append(lenMin[i]);
if (lenMin[i] != lenMax[i]) {
ret.append('-').append(lenMax[i]);
}
}
}
ret.append((fixed) ? " (fixed)" : "");
return ret.toString();
}
}
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